INSTRUCTION MANUAL

COMMUNICATIONS RECEIVER

iC- r8500
 IMPORTANT EXPLICIT DEFINITIONS
READ THIS INSTRUCTION MANUAL WORD DEFINITION
CAREFULLY before attempting to operate the Personal injury, fire hazard or electric
receiver. RWARNING! shock may occur.

CAUTION Equipment damage may occur.

SAVE THIS INSTRUCTION MANUAL. This
instruction manual contains important safety and If disregarded, inconvenience only. No risk
NOTE
operating instructions for the IC-R8500. of personal injury, fire or electric shock.

Versions of the IC-R8500 which display the “CE”

symbol on the serial number label, comply with
the essential requirements of the European
Radio and Telecommunication Terminal Directive 1999/5/
EC, and that any applicable Essential Test Suite measure-
ments have been performed.

PRECAUTIONS
RWARNING! NEVER connect the receiver to an INDOOR USE ONLY! NEVER expose the
AC outlet directly. This may pose a fire hazard or IC-R8500 or AC adapter to rain, snow or any liquids.
result in an electric shock. Always use an optional AC
adapter or connect to a 13.8 V DC power source. DO NOT use or place the receiver in areas with
temperatures below –10°C (+14°F) or above +50°C
RWARNING! NEVER connect to an AC outlet that (+122°F).
exceeds the suggested voltage for each AC adapter
version. This could cause a fire or ruin the AC adapt- DO NOT place the receiver in excessively dusty
er and/or receiver. environments or in direct sunlight.

RWARNING! NEVER connect the receiver to a DO NOT place the receiver against walls or putting
power source of more than 16 V DC or use reverse po-
anything on top of the receiver. This will obstruct heat
larity.������������������������������������������������
This could cause a fire or damage the receiver.
dissipation.

RWARNING! NEVER use non-rated fuses. Non- RESPECT other people’s privacy. Information over-
rated fuses could cause a fire or ruin the receiver. heard but not intended for you cannot lawfully be
used in any way.
RWARNING! NEVER let metal, wire or other
objects touch any internal part or connectors on the
rear panel of the receiver. This will cause electric
shock.

UNPACKING
Accessories included with the IC-R8500:
q w e Qty.
q DC power cable ................................................... 1
w Mini plug (2-conductor, 3.5d) ............................... 1
e Phono (RCA) plugs .............................................. 2
r Fuse (FGMB 125 V 3 A; internal use) .................. 1
t Fuses (FGB 3 A; for DC cable) ............................ 2
r t y u i y Screws (M4 × 12 for optional MB-23) .................. 2
u Screws (C0 3 × 8 for optional MB-23 feet) ........... 4
i Allen bolts (M5 × 8 for optional MB-12) . .............. 4

i
TABLE OF CONTENTS
IMPORTANT . ........................................................... i 8 SET MODE ......................................................... 30
EXPLICIT DEFINITIONS . ........................................ i ■ General ..................................................................... 30
PRECAUTIONS . ...................................................... i ■ Quick set mode items ............................................... 31
UNPACKING . ........................................................... i ■ Initial set mode items ................................................ 31
TABLE OF CONTENTS . .......................................... ii
9 CONNECTOR INFORMATION ..................... 33– 34
1 PANEL DESCRIPTION ..................................... 1–6
■ Front panel .................................................................. 1 10 CONTROL COMMANDS ............................ 35– 36
■ Rear panel .................................................................. 5 ■ Command table . ....................................................... 35
■ Function display .......................................................... 6 ■ Data format ............................................................... 35

2 CONNECTIONS .............................................. 7–10 11 MAINTENANCE . .............................................. 37

■ Mounting installation ................................................... 7 ■ Disassembly . ............................................................ 37
■ Required connections .................................................. 8 ■ Fuse replacement ..................................................... 37
■ Antenna connection ..................................................... 9 ■ Level adjustments ..................................................... 37
■ Grounding ................................................................... 9 ■ Memory backup ........................................................ 37
■ Tape recorder connections ........................................ 10 ■ CPU resetting . .......................................................... 37
■ Transceive function ................................................... 10 ■ Cleaning .................................................................... 37
■ Connecting to a PC .................................................. 10
12 OPTIONAL INSTALLATIONS...................... 38– 39
■ Data demodulation terminal ...................................... 10
■ UT-102 voice synthesizer unit ............................... 38
3 FREQUENCY SETTING ............................... 11–12 ■ FL-52A cw narrow filter ....................................... 38
■ Read me first ............................................................ 11 ■ CR-293 high stability crystal unit ........................ 39
■ Using the keypad ...................................................... 11
13 TROUBLESHOOTING . ............................... 40–41
■ Using the main dial ................................................... 12
■ Lock function . ............................................................ 12 14 SPECIFICATIONS ............................................. 42
4 RECEIVE FUNCTIONS ................................. 13–16 15 OPTIONS .......................................................... 43
■ Initial settings ............................................................. 13
■ Mode selection . ........................................................ 13 16 DOC .................................................................. 44
■ Squelch function ....................................................... 14
■ Functions for FM ....................................................... 14
■ Functions for SSB/CW ............................................... 14
■ Data communications ................................................ 16

5 MEMORY CHANNELS .................................. 17–22

■ General ..................................................................... 17
■ Bank selection .......................................................... 17
■ Channel selection ..................................................... 18
■ Programming ............................................................ 19
■ Copy and paste (memory editing) ............................. 19
■ Clearing .................................................................... 19
■ Channel/bank names ................................................ 20
■ Assigning channels numbers . .................................. 21

6 SCANS . ........................................................ 23–28

■ Operation .................................................................. 23
■ Mode select function . ............................................... 25
■ Specifying skip channel and frequency .................... 25
■ Automatic bank limit/skip functions . ......................... 26
■ Voice scan control function ....................................... 26
■ Programming scan edge frequencies ....................... 27
■ Scan speed/delay functions ...................................... 27

7 SLEEP TIMER ..................................................... 29

ii
 1 PANEL DESCRIPTION

■ Front panel @0

S 1 3 5 7 9 +20dB +60dB FM
q POWER SLEEP
LOCK
SIGNAL

NB AFC AGC-F APF-N BANK SEL-CH

SLEEP/ SET iC-r8500 RECV 10-ATT-20 ICOM IC-R
COMMUNICATION RECEIVER
w
REC
REMOTE MODE

e WFM FM AM SSB/CW TS

REC OUT
NB/AFC AGC 10dB 20dB TS
r
AF GAIN SQUELCH APF IF SHIFT
SPCH
LOCK
PHONES

t APF

yu i o !0 !1 !2 !3 !4

q POWER SWITCH [POWER] u NOISE BLANKER/AFC SWITCH [NB]/[AFC]

Turns power ON and OFF. Activates the noise blanker function or automatic
frequency control function.
w SLEEP/SET SWITCH [SLEEP/SET] • The noise blanker is used for removing pulse-type noise
➥ Push momentarily to set the sleep timer (p. 29). when SSB, CW or AM mode is selected (p. 15).
• Selectable times are 30, 60, 90, 120 min. or OFF. • The automatic frequency control tunes the displayed fre-
• “ ” appears in the function display when the quency automatically when an off-center frequency is re-
sleep timer is set. ceived. It activates when FM or WFM is selected (p. 14).
➥ Push for 1 sec. to enter quick set mode (p. 30).
• Use the [M-CH] selector and main dial to select items i AUDIO FREQUENCY GAIN CONTROL
and contents, respectively. [AF GAIN] (p. 13)
Rotate clockwise to increase the audio output; rotate
e RECORDER REMOTE JACK [REC REMOTE] (p. 10) counterclockwise to decrease the audio output.
Controls the running of a tape recorder for record-
ing. Connects to the REMOTE jack on a tape re- o AUTOMATIC GAIN CONTROL [AGC] (p. 15)
corder. Toggles the time constant of the AGC circuit be-
tween “slow” and “fast.”
r RECORDER JACK [REC OUT] (p. 10) • When “fast” is selected, “AGC-F” appears.
Outputs an audio signal. Connect to the AUX or • Cannot be used in FM or WFM modes.
LINE IN jack on a tape recorder.
!0 SQUELCH CONTROL [SQUELCH] (p. 14)
t HEADPHONE JACK [PHONES] Varies the squelch threshold level (to mute noise
Accepts headphones with 4–16 Ω impedance. when receiving no signal).
• W hen headphones are connected, no receive audio S-meter squelch
comes from the speaker. threshold
• Stereo headphones can be connected, however, output • Signals below the
is monaural. Noise squelch
S-meter level
threshold (not
are muted.
y MODE SWITCHES [WFM]/[FM]/[AM]/[SSB/CW] available in SSB,
(p. 13) CW, WFM and
AM narrow modes)
➥ Push to select an operating mode.
• The following keys toggle between several modes:
[FM] ................. FM, FM narrow
[AM] . ............... AM, AM narrow, AM wide !1 IF SHIFT CONTROL [IF SHIFT] (p. 14)
[SSB/CW] ........ USB, LSB, CW, optional CW narrow Shifts the center frequency of the receiver’s IF
➥ When SSB/CW mode is selected, push [SSB/CW] passband to reject interfering signals.
for 1 sec. to adjust the BFO frequency. (p. 15). • Cannot be used in FM, WFM and AM modes.
1
 PANEL DESCRIPTION 1

!9

.;,
1 QZ 2 ABC 3 DEF
OFF DLY
M-CH
4 GHI 5 JKL 6 MNO BANK

kHz
SKIP-CH
R8500 7 PRS 8 TUV 9 WXY BANK
M
ENT
. 0 CE ENT

NAME

MEMO PROG AUTO PRIO

SCAN/ SCAN SET

SEL SKIP VSC DLY D/S

M-CH DELAY/SPEED
M-SET BANK

M-CL MW

!5 !6 !7 !8

• Automatic announcement at signal detection during

Center frequency Center frequency
scan is available. Refer to the “REC SPCH” item on
is shifted down. is shifted up.
p. 31 for details.
➥ Push for 1 sec. to activate the lock function (p. 12).
• Push for 1 sec. again to cancel the lock function.
• The lock function action can be selected in set mode
to cover the main dial only, or to cover both the main
!2 AUDIO PEAK FILTER CONTROL [APF] (p. 15) dial and front panel switches.
Adjusts the audio peak filter setting to pick up a de-
sired audio frequency. Only valid when the [APF] !6 TUNING STEP SWITCHES [TS▲]/[TS▼] (p. 12)
switch is ON. Select the tuning step for the main dial. Push [TS▲]
• Clockwise rotation adjusts the filter setting higher; coun- to select a larger tuning step; push [TS▼] to select
terclockwise rotation adjusts the filter setting lower. a smaller tuning step.
•1  0 Hz, 50 Hz, 100 Hz, 1 kHz, 2.5 kHz, 5 kHz, 9 kHz,
!3 ATTENUATOR SWITCHES [10dB]/[20dB] 10 kHz, 12.5 kHz, 20 kHz, 25 kHz, 100 kHz and 1
Push to activate one of the attenuators. MHz are selectable.
➧ Push [10dB] to activate the 10 dB attenuator.
• P rogrammable tuning steps can be set between 0.5
➧ Push [20dB] to activate the 20 dB attenuator.
and 199.5 kHz.
➧ Push [10dB] + [20dB] to activate the 30 dB attenuator.
• 10 dB and 30 dB attenuator cannot be used below 500 kHz. ➠ To set programmable tuning steps, enter the desired
steps via the keypad, then push [TSY]or [TSZ].
!4 AUDIO PEAK FILTER SWITCH [APF] (p. 15)
➥ Push momentarily to toggle the audio peak filter !7 MAIN DIAL
circuit ON and OFF. Changes the operating frequency, set mode
• U se the [APF] control to adjust the center of the contents, etc.
audio peak passband.
➥ When the audio peak filter circuit is ON, push for !8 BRAKE ADJUSTMENT SCREW
1 sec. to toggle the filter setting between normal Adjusts the main dial tension.
and narrow. !9 FUNCTION DISPLAY (p. 6)
• ‘Narrow’ is available for SSB, CW and AM only.
Shows the selected frequency, mode, memory
!5 SPEECH/LOCK SWITCH [SPCH/LOCK] name, etc.
➥ Push momentarily to activate the voice synthe-
@0 S-METER
sizer function and have the displayed frequency
➥ Shows the strength of the received signal.
announced.
➥ Shows the squelch threshold level when the
• An optional UT-102 speech synthesizer unit is neces-
[SQUELCH] is rotated past the center position.
sary to activate the voice synthesizer function (p. 38).
2
 1 PANEL DESCRIPTION

S 1 3 5 7 9 +20dB +60dB FM
POWER SLEEP
LOCK
SIGNAL

NB AFC AGC-F APF-N BANK

SLEEP/ SET iC-r8500 RECV 10-ATT-20 ICOM
COMMUNICATION RECEIVER

REC
REMOTE MODE

WFM FM AM SSB/CW TS

REC OUT
NB/AFC AGC 10dB 20dB TS

AF GAIN SQUELCH APC IF SHIFT

SPCH
LOCK
PHONES

APF

@1 MEMORY SET SWITCH [M-SET] (p. 19) • When scan delay time is assigned, this control adjusts
Used to ‘copy and paste’ the displayed frequency the scan delay time (scan pausing interval) during sig-
into another memory channel. nal reception. This setting is effective when “ ”
• The first push is used to copy ( M appears), and the sec- is selected for the scan resume condition.
ond push is used to paste ( M disappears). • When scan speed is assigned, this control adjusts the
• Frequency, mode, tuning step, memory name, etc. can scan speed. In this case, scan delay time is determined
be programmed into a temporary memory. while setting.

@2 MEMORY CLEAR SWITCH [M-CL] (p. 19) @7 SCAN SWITCHES [SCAN ]

Push and hold to clear the contents of the dis- All of these switches are related to the scan func-
played memory. tion in some way as follows:
• Bank names cannot be cleared. [MEMO] (p. 23)
➥ Push momentarily to start/stop memory scan.
@3 MEMORY WRITE SWITCH [MW] (p. 19)
➥ Push numeral keys, then this key to start memo-
Push and hold to store the displayed frequency,
ry scan in the specified bank.
mode, tuning step, etc. into the selected memory
➥ Push this key, then a mode switch to activate
channel.
mode select scan function.
@4 BANK SWITCH [BANK] (p. 17) ➥ Push for 1 sec. to set automatic bank and skip
➥ Push momentarily to toggle the bank limit func- functions.
tion ON and OFF (p. 18). • The bank limit function and/or memory skip functions
• While “BANK” appears, only memory channels within are activated automatically when “AUTO” is selected
the selected bank can be selected via the [M-CH] se- and scan is started.
lector. [SEL] (p. 23)
➥ Push for 1 sec. to increase/decrease the number ➥ Push momentarily to start/stop memory select
of memory channels in the selected bank (p. 21). scan.
➥ Push for 1 sec. to set the memory channel as a
@5 MEMORY CHANNEL SELECTOR [M-CH] (p. 18)
select channel.
➥ Selects a memory channel in normal use.
• Clockwise rotation selects higher memory channel [PROG] (p. 24)
numbers; counter clockwise rotation selects lower ➥ Push momentarily to start/stop programmed scan.
memory channel numbers. ➥ Push numeral keys, before or after pushing this
➥ Selects a set mode item when quick set mode or key to start programmed scan using the speci-
initial set mode is selected (p. 30). fied scan edge group.
• 10 scan edge groups are available.
@6 DELAY/SPEED CONTROL [DELAY/SPEED] (p. 28)
Adjusts the scan delay time or scan speed ➥ P ush for 1 sec. to program scan edges for pro-
depending on the [DLY ] switch setting. grammed scan.
3
 PANEL DESCRIPTION 1

.;,
1 QZ 2 ABC 3 DEF
OFF DLY M-CH
4 GHI 5 JKL 6 MNO BANK

SEL-CH SKIP-CH
kHz @8
IC-R8500 M 7 PRS 8 TUV 9 WXY BANK

ENT
. 0 CE ENT

NAME

MEMO PROG AUTO PRIO

SCAN/ SCAN SET @7
SEL SKIP VSC DLY D/S

M-CH DELAY/SPEED
M-SET BANK

M-CL MW

@1 @2 @3 @4 @5 @6

[SKIP] (p. 25) ➧ “∞” is underscored: scan is cancelled when receiving

➥ Push momentarily to toggle the skip function ON a signal.
and OFF for any scan. ➥ P ush for 1 sec. to enter the delay time/scan
• Automatic skip activation is available with the [MEMO] speed setting condition.
switch. • The function of the [DELAY/SPEED] control can be
➥ Push for 1 sec. to set the memory channel as a selected.
skip channel.
@8 KEYPAD
[AUTO] (p. 24) The keypad can be used for several functions as below:
➥ Push momentarily to start/stop auto write scan. • Keypad then [ENT] (then [MW])
➥ Push for 1 sec. to select the written memories — Direct frequency input.
condition for the auto write scan. • Keypad then [M-CH]
• Two conditions are available, clear auto-written — Memory channel selection.
memories before scan starts; and, keep auto written • [CE • NAME] then keypad
memories before scan start. — Alphanumeric input for memory, bank names, etc.
• Keypad then [TSY] or [TSZ]
[VSC] (p. 26) — Arbitrary tuning step setting.
Push to toggle the voice scan control function ON • Keypad then [MEMO] or [SEL]
and OFF. — Specify memory bank then start memory scan or se-
• The VSC function resumes the scan when a detected sig- lect memory scan.
nal does not contain voice components. • Keypad then [PROG] or [AUTO]
• “VSC” appears while the voice scan control function is — Specify scan edge group, then start programmed
activated. scan or auto write scan.
[PRIO] (p. 25)
➥ Push momentarily to start/stop priority scan.
• Priority scan can be used in combination with other
scans.
➥ Push for 1 sec. to enter the priority channel pro-
gramming condition.
[DLY ] (p. 27)
➥ Push momentarily to select a scan resume con-
dition.
➧ “OFF” is underscored: scan pauses on a signal until it
disappears, then resumes 3 sec. after that.
➧ “DLY” is underscored: scan resumes according to
the [DELAY/SPEED] control setting. When a signal
disappears, scan resumes 3 sec. later.
4
 1 PANEL DESCRIPTION

■ Rear panel

q w e r t y u

!1 !0 o

q RS-232C CONNECTOR (p. 10) u DC IN JACK (p. 8)

Connects an RS-232C cable. An RS-232C cable Connects an optional AC adapter.
• A regulator circuit has been designed between this con-
can be used to connect the IC-R8500 to a PC. In
nector and the DC 13.8 V jack.
this way commands can be sent to the receiver via • Be sure the jumper connector is connected to the DC
the PC. 13.8 V jack.
w CI-V REMOTE CONTROL JACK (p. 10) i HF 50 Ω ANTENNA CONNECTOR (p. 8)
Allows connection to an Icom CI-V system trans- Connects an antenna to cover the frequency range
ceiver or another receiver for the transceive func- below 30 MHz.
tion. Also connects to a PC with several receivers • Use a coaxial cable and a PL-259 connector.
for command control via an optional CT-17 ci - v • Be sure this connector is selected in quick set mode
level converter. (p. 31).

e IF OUT JACK o GROUND TERMINAL (p. 9)

Outputs a 10.7 MHz IF signal with 9 V DC for an Connect this terminal to a ground.
external equipment.
!0 HF 500 Ω ANTENNA CONNECTOR (p. 8)
r AGC JACK (p. 16) When a 500 Ω long wire antenna is used for HF band
This jack has functions which are selectable receiving, this connector is used instead of the 50 Ω
through internal receiver settings. antenna connector.
•O  utputs an AGC signal for an external equipment • Set the “HF ANT” item to 500 to use this connector
(default). (p. 31).
• Outputs audio detected signal without de-emphasis for
9600 bps data detection (FM mode only). !1 VHF/UHF ANTENNA CONNECTOR (p. 8)
Connects an antenna to cover the frequency range
t DC 13.8 V JACK (p. 8) over 30 MHz.
➥ Plug in the jumper connector here when using • Use a coaxial cable and type-N connector.
an optional AC adapter.
➥ Connects to a 13.8 V DC power source using the
supplied DC cable when the AC adapter is not
connected.

y EXTERNAL SPEAKER JACK

Connects an 8 Ω external speaker.
• When an external speaker is connected, the internal
speaker does not function.

5
 PANEL DESCRIPTION 1

■ Function display
q w e r t y

REMOTE WFM AMUSBLSBCW WIDE NAR SKIP VSC OFF DLY

@4 SLEEP P u
@3 LOCK
@2 MHz kHz
NB AFC AGC-F APF-N BANK SEL-CH SKIP-CH
@1 RECV 10-ATT-20 M

@0 !9 @0 !8 !7 !6 !5 !4 !3 !2 !1 !0 o i

!2 SELECT CHANNEL INDICATOR (p. 23)

q REMOTE INDICATOR (p. 35) Appears when the selected memory channel is set
Appears when a level control command is received from a as a select channel.
PC via CI-V data.
• When this indicator appears, the control knob’s setting !3 BANK NUMBER INDICATOR (p. 17)
is ignored. Shows the selected memory bank number.
• This indicator will disappear when the control knob is rotated.
!4 BANK INDICATOR (p. 18)
w MODE INDICATORS (p. 13) ➥ Appears when the bank limit function is activated.
Show the operating mode. ➥ Flashes during scan when the bank limit func-
e FREQUENCY READOUT tion is activated by the auto bank function.
Shows the operating frequency.
!5 BANK NAME INDICATOR (p. 20)
r SKIP INDICATOR (p. 25) Displays names programmed into a bank.
➥ Appears when the skip function is activated.
!6 AUDIO PEAK FILTER INDICATOR (p. 15)
➥ Flashes during scan when the skip function is “APF” or “APF-N” appears when the audio peak fil-
activated by the auto skip function. ter function is activated.
t VSC INDICATOR (p. 26) !7 ATTENUATOR INDICATORS
Appears when the voice scan control function is Appear when the RF attenuator is activated.
activated.
!8 AUTOMATIC GAIN CONTROL INDICATOR (p. 15)
y SCAN RESUME CONDITION INDICATORS (p. 27) AGC-F appears when AGC fast is selected; no indi-
Show the selected scan resume condition. cation appears when AGC slow is selected.
u TUNING STEP INDICATORS (p. 12) !9 RECEIVE INDICATOR
Show the selected tuning step. Appears while receiving.
• “ P ” appears when a programmable tuning step is selected.
@0 FM CENTER INDICATORS (p. 14)
i TEMPORARY MEMORY INDICATOR (p. 19)
Appear when the received signal is not tuned to its
➥ Appears when [M-SET] is pushed to indicate
center frequency.
that a frequency is being temporarily saved.
➥ Disappears when the temporary memory is @1 NOISE BLANKER INDICATOR (p. 15)
pasted into another memory channel. Appears when the noise blanker circuit is activated.
o MEMORY CHANNEL READOUT (p. 17) @2 AFC INDICATOR (p. 14)
Shows the selected memory channel number. Appears when the automatic frequency control
function is activated in either FM or WFM modes.
!0 SKIP CHANNEL INDICATOR (p. 25)
Appears when the selected memory channel is set @3 LOCK INDICATOR (p. 12)
as a skip channel. Appears when the main dial or front panel switches
are locked.
!1 MEMORY NAME INDICATORS (p. 20)
Display names programmed into a memory, or scan @4 SLEEP INDICATOR (p. 29)
group. Appears when the sleep timer is set.
6
 2 CONNECTIONS

■ Mounting installation
D Location
Select a location for the receiver that allows adequate
air circulation and access to the front and rear panels.
Do not place in areas subject to extreme heat, cold,
or vibrations, or near TV sets, radios and electromag-
netic sources.

Be careful of the internal temperature of the receiver.

Installation into a rack or other enclosed area may
increase the internal temperature over the useable
temperature range. Specifications are not guaranteed
under such conditions.

D Receiver stand
The base of the IC-R8500 has an adjustable stand for
desktop use. Set the stand to one of two angles de-
pending on your operating conditions.

D Optional bracket and carrying handle • Carrying handle

• Mounting bracket An optional handle allows you to easily carry and
An optional mounting bracket is available to install the transport the receiver.
radio under a table, on a wall, in a vehicle, etc. Attach the MB-23 carrying handle with the supplied
Select an area to mount the receiver keeping in mind rubber feet as shown.
that the weight of the IC-R8500 is approx. 7 kg.
CAUTION: The screws supplied with the MB-23
Flat washer
cannot be used with the IC-R8500. Use the screws
supplied with the IC-R8500 when attaching the
MB-23.

Spring
washer

Allen bolt
supplied with
the IC-R8500.

7
 CONNECTIONS 2

■ Required connections
Supplied DC power cable
External speaker
(p. 43)

IC-R8500

Connect Unplug the jumper plug

either power from the [DC13.8V] jack.
source

AC adapter AD-55/A/S/V*

The jumper plug must

be connected to the
Computer control High speed data [DC 13.8V] jack.
(p. 10) connection (p. 16)
* The AD-55, AD-55A, AD-55S
and AD-55V have different
shapes.

Ground connection (p. 9)

VHF/UHF wide band Long wire antenna HF antenna

antenna

30 MHz –2 GHz coverage 0.1–30 MHz coverage 0.1–30 MHz coverage

The optional AH-7000 is Select the active antenna connector in quick set mode (p. 31)
available for 25 MHz to
1300 MHz coverage.
The optional AH-8000 is
available for 100 MHz to
3300 MHz coverage.

8
 2 CONNECTIONS

■ Antenna connection ■ Grounding

Antennas play a very important role in receiver RWARNING! NEVER use a gas pipe or electri-
operation. Connecting a poor quality antenna to the cal conduit pipe for grounding.
IC-R8500 will result in less than optimum performance.

The IC-R8500 requires at least 2 antennas for full To prevent accidents involving electricity and interfer-
frequency coverage: one for 0.1 to 30 MHz and one ence from transceivers, ground the receiver through
for 30 to 2000 MHz. the [GND] terminal on the rear panel.

For best results, connect a heavy gauge cable to a

D Using a long wire antenna for HF bands
water pipe or long, earth-sunk copper rod. Make the
The IC-R8500 has a 500 Ω phono (RCA) antenna distance between the [GND] terminal and ground as
connector for the HF bands. When using a long wire short as possible.
antenna, instead of a 50 Ω matched antenna, use
one as long as possible (at least 10 m, 33 ft) and
select the active connector as follows:

qP  ush [SLEEP/ ] for 1 sec. to enter quick set

mode.
w Rotate the [M-CH] selector to select the “HF
ANT” item.
e Rotate the main dial to select the antenna connector.
r Push [SLEEP/ ] momentarily to exit quick set
mode.

500 HF ANT

TYPE-N CONNECTOR INSTALLATION EXAMPLE

Nut Rubber gasket
q 15 mm Slide the nut, washer,
e Solder hole Soft solder the center
rubber gasket and conductor. Install the
clamp over the center conductor pin and
Clamp
Washer coaxial cable, then cut No space solder it.
the end of the cable
evenly.
r Carefully slide the plug
Plug body
w 3 mm 6 mm
Strip the cable and body into place aligning
fold the braid back the center conductor pin
over the clamp. on the cable. Tighten the
Center conductor nut onto the plug body.
• Be sure the center
conductor is the same
(10 mm ≅ 3/8 in)
height as the plug body.

PL-259 CONNECTOR INSTALLATION EXAMPLE

q 30 mm Slide the coupling ring

e solder solder Slide the connector
down. Strip the cable body on and solder it.
jacket and soft solder.
Coupling ring 10 mm (soft solder)

w 10 mm Soft Strip the cable as r Screw the coupling ring

solder
shown at left. Soft onto the connector body.
solder the center
1–2 mm conductor.

(10 mm ≅ 3/8 in)

9
 CONNECTIONS 2

■ Tape recorder connections

The [REC OUT] jack has 350 mV rms/4.7 kΩ output
IC-R8500
for connection to other audio equipment.
[REC
REMOTE]
SCAN SET

[AUX IN] or [REC OUT]

[LIVE IN] jack 350 mVrms
4.7 kΩ
[REC REMOTE] jack: Grounds when a signal is ✔ Convenient:
received and squelch opens. If a tape recorder When an optional UT-102 voice synthesizer unit
has a control terminal, this jack can be used for is installed, detected frequencies during scanning
recording control. (2 A/DC max.) can be recorded. See pgs. 31, 32 for settings.

■ Transceive function
Icom CI-V transceivers or receivers can be connect- * When a set frequency is out-of-range for one of the con-
ed via the [REMOTE] jack. The frequency and mode nected transceivers or receivers, the connected radio’s
become the same* when either radio is changed. frequency/mode does not change.

Connect to [REMOTE] jack

• Be sure the “CIV TRAN” item is turned ON in initial set mode (p. 32).

■ Connecting to a PC
The IC-R8500 can connect directly to a personal
computer providing control of multiple functions
such as instant frequency/name programming using
appropriate software. See pgs. 35, 36 for the control
command table. IC-R8500

RS-232C
cable

3.TXD (data output)

8 2.RXD (data input)
13 1

A DB9/DB25 adapter may be

25 20 6 14
required depending on the PC’
Personal computer
s connector.

■ Data demodulation terminal

See p. 16 for details regarding connection and opera-
tion.
10
 3 FREQUENCY SETTING

■ Read me first
The IC-R8500 uses memory channels for storage
of frequencies (as well as mode, tuning steps, etc.).
When turning power OFF or changing memory chan-
nels, the previously displayed frequency cannot be
recalled unless it has been stored into a memory
channel. Therefore, when you want to keep a dis-
played frequency for later recall, you must program it
into a memory channel by pushing [MW] for 1 sec.
Push [MW] for 1 sec. after tuning.

FM OFF DLY ✔ Convenient:

Use [M-SET] to program a displayed frequency
kHz (and its mode, etc.) without overwriting the currently
selected memory. See p. 19.
USR-A BLANK
“BLANK” appears in the memory name area until
[MW] is pushed for 1 sec.

■ Using the keypad

qP
 ush the numeral keys on the keypad to enter the eP
 ush the numeral keys to enter the frequency dig-
MHz digits for the desired frequency. its below 1 MHz.
• If a key is mistakenly pushed, push [CE ≈] and start • If a key is mistakenly pushed, push [CE ≈] and start
again from the beginning. again from the beginning.
• When entering the same MHz digits as the displayed r Push [ENT] to set the input frequency.
frequency, this step can be skipped. • When pushing [ENT] after entering the MHz digits,
w Push [ • Ω]. zeros are automatically entered for the kHz digits.

[EXAMPLE]: SETTING THE FREQUENCY USING THE KEYPAD

• To set to 145.00 MHz ENT

1 4 5

• To set to 1296.040 MHz ENT

1 2 9 6 • 0 4

• To set to 850 kHz ENT

0 • 8 5
(0.85 MHz)

• To change from 1296.040 ENT

• 8 5
to 1296.850 MHz

11
 FREQUENCY SETTING 3

■ Using the main dial

Rotate the main dial to change the frequency.
• The frequency changes in increments determined by the
selected tuning step (see below).
• When the lock function is activated (“LOCK” appears) the
frequency cannot be changed.

D Selecting a tuning step

13 preset tuning steps are available plus 1 programma-
ble tuning step (see below). The preset tuning steps are:
[TSY]
10 50 100 Hz SCAN SET

[TSZ]
1 2.5 5 9 10 12.5 20 25 100 kHz
1 MHz
Push [TSY] or [TSZ] to change the selected tuning
P
step. Tuning step
D Setting the programmable tuning step
indicators MHz kHz
The programmable tuning step can be set between
the range of 0.5–199.5 kHz (in 0.5 kHz steps) for each appears when the programmable tuning step
memory independently.
P is selected.
qP  ush the numeral keys on the keypad that corre- MHz or kHz appears to indicate the units of
spond to the tuning step you wish to program. the selected tuning step.
w Push [TSY] or [TSZ] to set the programmable
tuning step to the selected value.
• The programmable tuning step is automatically selected
as the active tuning step.

[EXAMPLE]: Setting the programmable tuning step to 50 kHz.

5 0 TS
(or TS )
P

kHz kHz kHz

■ Lock function D Setting the lock function coverage

The lock function can be set to lock the main dial only
The lock function electronically locks the indicated or, the main dial and most of the front panel switches.
frequency from accidentally being changed.
qP  ush [SLEEP ] for 1 sec. to enter quick set
Push [SPCH ] for 1 sec. to toggle the lock func- mode.
tion ON and OFF. w Rotate the [M-CH] selector to select the “LOCK”
• “LOCK” appears in the function display while the indication.
lock function is activated. e Rotate the main dial to set the lock function cover-
age to “DIAL” or “PANEL.”
FM OFF DLY

r Push [SLEEP ] momentarily to exit quick set

LOCK
kHz
mode.
*ICOM IC-R8500 FM OFF DLY

kHz

LOCK DIAL

12
 4 RECEIVE FUNCTIONS

■ Initial settings
Before turning power ON, set controls and switches as indicated below:

SCAN SET

[AF GAIN]: 10 o’clock

[SQUELCH]: max. CCW [APF]: center

[IF SHIFT]: center

After turning power ON,

check the display for indications below and remove as follows:

Push [SLEEP]
FM OFF DLY

SLEEP
Push and hold
[SPCH • LOCK] LOCK
kHz
NB AFC AGC-F APF-N BANK
RECV 10-ATT-20 *ICOM IC-R8500
Push [NB/AFC]

Push [AGC] Push [10dB] and/or [20 dB]

■ Mode selection
Push one of the mode keys one or more times to The indications in the table appear in the bank name
select the desired mode. Consult the table below for area for 1 sec. after an operating mode is selected.
basic characteristics of each mode.

MODE BANDWIDTH INDICATION DESCRIPTION

normal 12 kHz/–6 dB Amateur bands, citizens band, utility communications, marine bands,
FM etc. FM-narrow can only receive narrow FM signals; normal FM can
narrow 5.5 kHz/–6 dB receive both normal and narrow FM signals.

medium 5.5 kHz/–6 dB

Broadcasting, amateur bands, citizens band, air band, etc. AM-wide
AM wide 12 kHz/–6 dB mode is used for clear audio reception. Signals however, may be
received with interference.
narrow 2.2 kHz/–6 dB

USB
Shortwave broadcasting, amateur bands, etc. Use USB for normal
SSB 2.2 kHz/–6 dB
SSB reception; LSB is not normally used.
LSB

normal 2.2 kHz/–6 dB

Morse code communications. Use this mode to receive radio-tele-
CW narrow type, etc. by shifting the receive frequency.
500 Hz/–6 dB
(option)
TV broadcasting, FM broadcasting, etc. TV and FM broadcasting
WFM 150 kHz/–6 dB
cannot be accessed in FM mode because their signals are too wide.
13
 RECEIVE FUNCTIONS 4

■ Squelch function
The IC-R8500 has 2 types of squelch, noise squelch
and S-meter squelch.
Noise squelch: Only acts on noise; has good sen- S-meter squelch
sitivity. It can be adjusted for reception of weak sig- threshold
nals. Strong signals exceeding a certain level will Noise squelch • Signals below the
S-meter level
always cause the squelch to open. threshold (not
are muted.
available in SSB,
S-meter squelch: S-meter squelch does not open CW, WFM and
for weak signals but can be adjusted to open for sig- AM narrow modes)
nals over a wide range of strengths. Once you have
selected a threshold point in a range, the IC-R8500
will open for all signals above this point. When [SQUELCH] is
rotated past center, S 1 3 5 7 9 +20dB +60dB
To adjust the squelch, rotate [SQUELCH]. the S-meter shows
•C
 lockwise rotation closes the squelch (sets the thresh- the signal strength
old point higher); counterclockwise rotation opens the needed to open the
SIGNAL

squelch (for reception of weak signals). squelch.

■ Functions for FM
D Center indicator
FM signals have a wide bandwidth which makes
them easy to receive. However, you may be tuned RECV
off-center resulting in audio distortion. The IC-R8500’
s off-center indicators appear in such cases, making
it easy to fine tune to the center of the frequency. One of these indicators appears when the received
signal is off-center.

D AFC
AFC stands for automatic frequency control. The AFC
circuit automatically compensates the tuning when a AFC
receive frequency drifts or goes off frequency. RECV
When one of the off-center indicators appears, the
IC-R8500 can adjust the receive frequency auto-
When one of these indicators appears, the
matically—when the AFC function is turned ON and displayed frequency is automatically moved to the
an off-center frequency is received, the frequency center frequency.
in the display automatically changes to reflect the
center of the signal.

■ Functions for SSB/CW

D IF shift
The IF shift function electronically changes the APF IF SHIFT APF IF SHIFT APF IF SHIFT

center of the IF (intermediate frequency) passband

frequency to reject interference. The IF shift is not
available in FM and AM modes.
qA
 djust the [SHIFT] control for a minimum interfer-
ence signal level.
• The audio tone may be changed while the IF shift is in
use.
wS
 et the shift control to its center position when Shifts low Center Shifts high
there is no interference.
14
 4 RECEIVE FUNCTIONS

D Noise blanker
The noise blanker reduces pulse-type noise such as
that generated by automobile ignition systems. This
function is not effective for FM and WFM mode or [NB/AFC]
SCAN SET

for non pulse-type noise and wide width pulses. switch

Push [NB] to toggle the noise blanker ON and OFF.
• “NB” appears when the noise blanker is activated.

NOTE: When a strong signal is received while

the noise blanker is ON, the output audio may be
distorted. In such cases, the noise blanker should
be turned OFF. NB OFF NB ON

D Audio peak filter

The APF (audio peak filter) adjusts the peak fre-
quency of the received audio. The APF can be used [APF]
for adjusting the audio response. The IC-R8500 has switch SCAN SET

two selectable width filters.* Use the appropriate fil- [APF] control
ter width for optimum receiving.
q Push the [APF] switch.
APF is selected APF-N is selected
w Rotate the [APF] control to adjust the peak fre- [dB] [dB]

quency. 0 0

e To change the filter width*, push [APF] for 1 sec. –10 –10

*Available for SSB, CW and AM only. –20 –20

–30 –30

–40 –40
500 1k 2k 5k [Hz] 500 1k 2k 5k [Hz]

D BFO adjustment
BFO stands for beat frequency oscillator. This func-
tion is useful in conjunction with the IF shift function.
When eliminating interference with the IF shift func-
BFO 0.00kHz
tion, the audio characteristics of the received signal
are often changed. Use the BFO adjustment func-
tion to adjust the audio quality of the received signal
to that desired. [SSB/CW] SCAN SET

switch
q Push [SSB/CW] to select SSB or CW mode.
w Push [SSB/CW] for 1 sec. to activate the function.
[M-CH]
• BFO appears. BFO shift can be set for USB, selector
e Rotate [M-CH] to adjust the BFO. LSB and CW separately.
• –1.2 kHz to +1.2 kHz are selectable.

D AGC function
AGC stands for automatic gain control. This function
controls receiver gain to produce a constant audio AGC-F
output level even when the received signal strength RECV ICOM-
is varied by fading, etc. Use AGC slow for normal
phone operation; AGC fast for receiving data and
searching for signals. AGC time constant cannot be
changed in FM and WFM modes. [AGC]
SCAN SET

Push [AGC] to toggle between AGC fast and slow. switch

• AGC-F appears when AGC fast is selected; no
indicator appears when AGC slow is selected.

15
 RECEIVE FUNCTIONS 4

■ Data communications
D Connections
• For high speed data (9600 bps) reception in FM mode

[Audio IN] or
[Detector IN]
Rear
panel to [AGC]

RCA plug TU or TNC

Personal computer
• To use the [AGC] socket for AF output
Change the internal jumper plug as illustrated at AGC output
(default)
right.
• The output is obtained for FM mode only. AF direct detector
• Usable for 9600 bps only. output
• Refer to p. 37 for a description of opening the case. 200 mVrms/4.7 kΩ

• For regular speed data (1200 bps or lower) reception in any mode

SCAN SET

AF IN
to [REC OUT] TU or TNC
2-conductor 3.5(d) plugs
to [REC REMOTE] Personal computer
SQUELCH IN

D Receiving method
q Connect a terminal unit as above.
w Select FM mode (or USB, CW modes for HF
band data communications).
e Set the receiver to the desired frequency as below.
r Set the connected terminal unit to the appropri-
ate settings.
• Refer to the terminal unit’s instructions.

Frequency settings depend on the mode used.

FM mode: [Setting frequency(displayed freq.)]=[Desired freq.]

USB mode: [Setting frequency(displayed freq.)]=[Desired freq.]–[Center of Mark and Space freq.]
CW narrow mode: [Setting frequency(displayed freq.)]=[Desired freq.]–[Center of Mark and Space freq.]+ [600 Hz]
LSB mode (for amateur RTTY): [Setting frequency(displayed freq.)]=[Desired freq.] + [Mark freq.]

16
 5 MEMORY CHANNELS

■ General
The IC-R8500 has 1000 regular memory channels, NOTE: When memory channels without informa-
plus 20 programmable scan edge channels and 1 pri- tion (blank channels) are selected, the frequency
ority channel. 8-digit memory names are programmed is not displayed. Only the memory channel
into all 1000 channels and 5-digit bank names are number appears.
programmed into 20 user banks for convenient recall
The table below gives a general overview of the
and organisation of frequencies. Moreover, memory
IC-R8500’s memory channels.
channels can store mode information, a tuning step,
and ATT (attenuation) information.

BANK INITIAL CONTENTS USAGE

For normal use. Frequency, mode, tuning step, name and ATT information can
40 memories ×
be programmed. The number of channels in each bank is user-assignable.
20 banks
Banks cannot be deleted (they must contain at least 1 channel).
Frequencies detected during auto memory write scan are memorised into this
bank in sequence. Mode and tuning step are written at the same time. Note that
AUTO 100 memories
when the written memories condition is set as CL&START and auto write scan
is started, all memories in this bank are cleared.
Undesired signals such as from beacons, control-coded signals, etc., can be
programmed to be skipped during programmed scan and auto memory write
SKIP 100 memories
scan. When [MW] is pushed for 1 sec. while scan is paused, the displayed fre-
quency is programmed into this bank regardless of the selected bank.
For temporary storage when assigning channels to banks. Deleted channels
FREE Blank (contents have been cleared) are stored in this bank until being assigned to
another bank. This bank does not appear when no channel are assigned.
Memorize scan edge frequencies. 10 pairs of scan edges (0P1 to 9P2) are pro-
PROG 20 memories (fixed) grammable (upper and lower scan edges). Mode and tuning step are automati-
cally equalised to the last programmed channel in a pair.

■ Bank selection
To select regular channel banks: BANK
Push [M-CH • BANK▲] or [ENT • BANK▼], one or USR-A BLANK
more times to select the desired channel bank. .;,
• The bank indicator shows the selected bank. BANK
• Push and hold [BANK▲] or [BANK▼] to quickly cycle M-CH
USR-B BLANK
through the channel banks in the order to , FREE, BANK

AUTO and SKIP.

BANK
NOTE: The FREE bank is initially blank and USR-T BLANK
therefore cannot be selected. In order to select it BANK
at least 1 channel must be programmed into the BANK
FREE bank. See p. 21. FREE BLANK ENT
ENT

BANK
✔ Convenient: Bank names AUTO BLANK
The default names of “USR-A” to “USR-T” can be
set to your own preference. Refer to p. 20 for pro- BANK
gramming. SKIP BLANK

To select the programmed scan edge:

Push [PROG] for 1 sec.
•P
 ROG and channel number (0P1 to 9P2) appear. PROG *NONAME*

17
 MEMORY CHANNELS 5

■ Channel selection
D Using the [M-CH] selector
qS  elect the desired bank using [M-CH • BANK▲] or
[ENT • BANK▼]. [BANK ]
w Rotate the [M-CH] selector to select the desired [BANK ]
channel.
• Bank limit function
While rotating the [M-CH] selector, memory chan-
nels can be selected from within the current bank
only; or from any bank. [M-CH] selector
Push [BANK] to toggle the bank limit function ON
and OFF. ✔ Convenient: Automatic bank limit
When starting memory scan, the bank limit function
is activated automatically. This automatic selection
can be deactivated. See p. 26.
BANK BANK
USR-A M
BANK
USR-A M
SR- SR-
BANK doesn't BANK appears
appear

• Bank limit OFF • Bank limit ON

All memory channels can Only memory chan-
be selected via the [M-CH] nels in the current bank
selector. [BANK▲]/[BANK▼] can be selected. Banks
can be used. can be selected with the
[BANK▲]­/[BANK▼] keys
only.

D Using the keypad

Memory channels in the current bank can only be
selected via the keypad.
q Select the desired bank using [M-CH • BANK▲] or
[ENT • BANK▼].
w Push keys corresponding to the desired channel.
e Push the [M-CH] key to set the selected memory
channel.
• Input for memory channels not available is cancelled. [M-CH] key

[EXAMPLE]: Selecting channel 39 from within the currently selected bank

.;,

M-CH
3 DEF 9 WXY BANK

USR-A ABCD USR-A ABCD USR-A EFGH

[EXAMPLE]: Selecting channel 12 from a different bank (bank 3)

.;, .;,

M-CH M-CH
1 2 ABC
BANK
(3 times) QZ BANK

USR-A EFGH USR-D IJKL USR-D MNOP

18
 5 MEMORY CHANNELS

■ Programming
This is the method most often used to program
memory channels.

q Select the desired memory channel.

w Set the desired frequency.
• When the memory channel already contains information,
change the frequency using the main dial or the keypad.
• When the memory channel is blank, use keypad entry
only to set the frequency. [MW] key
e Set operating mode (p. 13) and tuning steps (p. 12).
FM OFF DLY
r Push and hold [MW] until the receiver emits 3
beeps.
kHz
• The information is stored in the memory channel.
USR-A BLANK
NOTE: When changing the memory channel
MW
before pushing [MW], the set frequency (and
Push for 1 sec.
mode/tuning steps) is erased.
FM OFF DLY

kHz

USR-A

■ Copy and paste (memory editing)

When the frequency (and mode/tuning steps) is set NOTE: Remember that pushing [MW] is always
for a channel; or, when you want to change a fre- necessary to program contents into a memory
quency using the contents of another memory chan- channel. Pasted contents will be cleared if the
nel, the copy/paste function is helpful to keep (or [MW] key is not pushed for 1 sec.
confirm) the previously programmed contents.

qP
 ush [M-SET] to temporarily store the displayed
frequency, mode, etc.
• “M” appears.
• Only 1 channel can be stored in the temporary space.
wS elect the memory channel you wish to program
the frequency into.
e Push [M-SET] again to paste the stored contents.
• “M” disappears. [M-SET] key

■ Clearing
Information programmed into a memory channel can
be cleared (erased).

q Select the memory channel to be cleared.

w Push and hold [M-CL] until the receiver emits 3
beeps.
✔ Convenient: Bank assign function
Using the bank assign function, memory channels
can be removed (along with their programmed con- [M-CL] key
tents) from a particular memory bank and placed
temporarily in the ‘free’ bank. See p. 21.

19
 MEMORY CHANNELS 5

■ Channel/bank names
Channel names of up to 8 characters and bank
names of up to 5 characters can be programmed for
convenience. Programmed names can be easily cop-
ied to other channels using the copy/paste function.

[CEť NAME] key

D Channel name programming
qS  elect the desired memory channel.
w Set the frequency (and mode/tuning steps), then
push and hold the [MW] key. USR-A
• When no data is programmed, “BLANK” appears and
memory names cannot be programmed. CE
e Push [CE≈ • NAME]. NAME
• A cursor appears at the first character space of the
name area. USR-A
1 QZ
r Enter the desired name via the keypad.
•P  ush the appropriate keys to input the desired charac- to
ters.
• To erase a character, overwrite with a ‘space’ using the 9 WXY
[M-CH • ] key.
USR-A MEMONAME
• To move the cursor forwards or backwards, use the [•Ω] BANK
or [CE≈] key.
t Push [ENT] to input the set name. ENT
ENT

USR-A MEMONAME

D Bank name programming

qS  elect the desired bank using [M-CH • BANK▲] or

[ENT • BANK▼].
w Push [CE≈ • NAME]. USR-A MEMONAME
•A  cursor appears at the first character space of the
name area. CE
• When no data is programmed, (“BLANK” appears) NAME
the cursor does not appear. Program a frequency or
change the channel in such cases. USR-A MEMONAME
eP ush [•Ω] to move the cursor to the bank name .
area.
5 times
r Enter the desired name via the keypad.
•U
 se the same method as for channel names (see
above). USR-A MEMONAME 1 QZ

t Push [ENT] to input the set name.

to
NOTE: When using [CE≈] on the last digit of the 9 WXY
bank name, the current name is cleared and the
previous one is substituted. DO NOT forget to
push [ENT] after the bank name is set. BANKN MEMONAME
BANK

ENT
ENT

BANKN MEMONAME

20
 5 MEMORY CHANNELS

■ Assigning channel numbers

The IC-R8500 has 20 banks in which memory chan- To rearrange bank channel assignments:
nels can be programmed and arranged. By default, q Delete memory channels from banks that have
each bank contains 40 memory channels, however, more memory channels than you need.
channels can be deleted from or added (inserted) to •D
 eleted channels are assigned to the ‘free’ bank auto-
banks to suit your preferences and operating style. matically.
wA
 dd (or insert) memory channels to banks in
Deleted channels are stored temporarily in the which you want to add channels.
“FREE” bank. •C
 hannels added to a bank are deleted from the ‘free’
bank.
NOTE: When shipped from the factory or after
resetting the receiver’s CPU, the “FREE” bank has
no memory channels and cannot be selected.

[BANK] switch

[M-CH] control

D Deleting memory channels

qS  elect the bank and memory channel you wish to

BANK
delete.
USR-T BLANK BANK
w Push [BANK] for 1 sec.
•O  ne of “INS. 1CH,” “DEL. 1CH,” “ADD.10CH,” or
“ADD. 1CH,”appears and flashes.
• Push [BANK] momentarily to exit the condition and (for 1 sec.)
BANK
return to the previous display, if desired. USR-T INS. 1CH
eR  otate [M-CH] until “DEL. 1CH” appears in the M-CH
display.
r Push [BANK] for 1 sec. to delete the selected
channel. BANK
• The memory channel (but not its contents) is moved USR-T DEL. 1CH BANK
to the “FREE” bank.

 Memory channels can only be deleted one at a

time to prevent accidental deletion of multiple (for 1 sec.)
BANK
channels; when you want to delete more than USR-T BLANK
one channel from a bank, repeat the above
steps as many times as necessary. The number of channels in this bank is
decreased.
NOTE1: Deleted channels are moved to the
‘free’ bank, however, the programmed contents
are erased.
NOTE2: The number of banks cannot be
decreased. This means that if there is only one
channel in a bank, it cannot be moved to the
‘free’ bank.

21
 MEMORY CHANNELS 5

D Adding/inserting memory channels

qS  elect the bank you wish to add memory

channel(s) to.
w Push [BANK] for 1 sec. BANK
•O  ne of “INS. 1CH,” “DEL. 1CH,” “ADD.10CH,” or BANK
USR-T BLANK
“ADD. 1CH,”appears and flashes.
• Push [BANK] momentarily to exit the condition and
return to the previous display, if desired. (for 1 sec.)
e Rotate [M-CH] to select the following:
INDICATION DESCRIPTION
BANK
1 channel will be inserted ‘in front’ of the USR-T INS. 1CH M-CH
selected channel.
INS. 1CH Insert 1 channel
• Programmed contents after the inserted
channel are shifted accordingly.
BANK
1 channel will be added ‘at the end’ of USR-T ADD. 1CH
ADD. 1CH the selected bank.
Add 1 channel
10 channels will be added ‘at the end’
ADD.10CH of the selected bank. BANK
USR-T ADD.10CH
rP
 ush [BANK] for 1 sec. to perform the selected Add 10 channels
operation.
BANK
• The memory channel(s) are deleted from the “FREE”
bank and added/inserted to the selected bank. USR-T DEL. 1CH
• Memory channels cannot be added/inserted into a Delete channel
memory bank when the “FREE” bank is empty. (see opposite page)

BANK

(for 1 sec.)

BANK
USR-T BLANK

22
 6 SCANS

■ Operation

D Memory scan
All memory channels (except skip channels) in the Select
Skip
selected bank are scanned at up to 40 ch/sec. Mch 3
Mch 2
Mch 4
qP
 ush [M-CH • BANK▲] or [ENT • BANK▼] to select
the desired bank. Mch 1
• Direct selection is also available as below. Select Mch 5
w Set the [SQUELCH] control to the threshold point. Mch 39
e Push [MEMO] to start the scan. Mch 6
Mch 7
• “MEMO” appears in the bank name area. Select
r Push [MEMO] again to stop the scan. Select

✔ Convenient:
Direct bank selection—Memory scan can be started
in a specific bank without using [BANK▲/▼]:
➪ Enter one or two digits for the bank number, then
push [MEMO].
Bank selection during memory scan—The selected
bank can be changed without stopping the scan: Push [MEMO]
➪ Enter one or two digits for the bank number, then
push [ENT]. FM OFF DLY

Bank limit and skip scan release—When starting

kHz
memor y scan, the bank limit and channel skip
functions are activated automatically. Refer to p. 26. MEMO
MEMO appears

D Memory select scan

Memory select scan allows you to increase scan Select
efficiency by searching for specified channels only, Skip
Mch 3
thereby increasing the rate at which the scan cycles Mch 2
Mch 4
through the memory channels. Set high priority
Mch 1 Select
channels as ‘select’ channels (memory select scan Select
searches for signals on these channels) while leav- Mch 5
ing out lower priority channels. Mch 39 Mch 6
Mch 7
Preparation—specifying select channels: Select
Select
Select the channel you want to specify as a ‘select’
channel, then push [SEL] for 1 sec.
Start/stop:
q Select the desired bank using [M-CH • BANK▲] or
[ENT • BANK▼].
w Set the squelch control to the threshold point.
e Push [SEL] momentarily to start scan.
• “SEL” appears in the bank name area.
r Push [SEL] again to stop the scan. Push [SEL]
NOTE: Memory select scan does not start unless
FM OFF DLY
2 or more channels in the bank are specified as
select channels.
kHz

✔ Convenient: SEL
The same convenient functions are available as de- SEL appears
scribed above.

23
 SCANS 6

D Programmed scan
Programmed scan (and auto memory write scan) Programmed edges
searches for signals within a specified frequency
range, using the selected tuning step increments. The
result is like an ‘automatic’ rotating of the main dial.

Preparation—setting the scan range:

Push and hold [PROG] to enter the ‘prog’ bank, then
input the desired edge frequencies, mode and tun-
ing steps. Refer to p. 27 for details.
Start/stop:
q Set the [SQUELCH] control to the threshold point.
w Push [PROG] to start the scan.
• “PROG” (and scan range number) appears in the bank
name area.
e Push [PROG] again to stop the scan.

✔ Convenient: Push [PROG]

Direct range selection—The desired programmed
scan range can be selected using the keypad. FM OFF DLY

➪ Push a numeral key before or after pushing the

[PROG] key. kHz

Skip scan release—Programmed scan skips all PROG0 *NONAME*

frequencies specified as skip channels in all 1000 PROG appears
channels.

D Auto memory write scan

Auto memory write scan operates in the same way
as programmed scan. However, when a signal is
received, the received frequency is automatically
written into a memory channel in the auto write bank. AUTO bank
0 1234.567.00
1 1235.678.00
Preparation—written memories condition: 2
3 1235.890.00

Push and hold [AUTO] to enter the written memory 4

•
1240.050.00
• ---------------
setting condition, then rotate the main dial to select •
98
the condition. 99 ---------------

AUTO START : Previously written memories

in the ‘Auto’ bank are saved, then frequencies are
written into the next available channels.
AUTO CL&START : Previously written mem-
ories in the ‘Auto’ bank are cleared, then frequencies
are written into channels, starting from channel 0.
Start/stop:
q Set the [SQUELCH] control to the threshold point.
w Push [AUTO] momentarily or for 1 sec. to start
the scan.
• CAUTION: Be sure the written memories condition is Push [AUTO]
set as desired, otherwise previously written memories
are cleared. FM OFF DLY

• “AUTO” (and scan range number) appear in the bank

name area. kHz
e Push [AUTO] again to stop the scan. AUTO0 *NONAME*
AUTO appears
✔ Convenient:
The same convenient functions are available as
described above.

24
 6 SCANS

D Priority scan
Priority scan monitors a specified frequency (the pri- Start/stop:
ority channel) once every 1–16 sec. (programmable) Push [PRIO] to start/stop the scan.
during any operation, such as receiving, scanning •P
 riority scan can be used in combination with other scan
other channels, etc. types: start another scan type during priority scan; or,
push [PRIO] while operating another scan.
Preparation—priority channel programming:
q Push [PRIO] for 1 sec.
• “*SET*” appears in the bank name area, then
changes to a flashing “PRIO.”
• Using this method, the priority channel can be called
up at any time with one push.
wS  et the desired frequency, mode and memory
name. Priority scan
e Push [MW] for 1 sec. to write the contents into
the priority channel.
r Push [PRIO] again to return to the previous chan- Programmed scan with priority scan
nel.

■ Mode select function

To operate memory scan or memory select scan in Select
a specific mode (ignoring other modes), the mode WFM Skip
select function is available. Mch 3
Mch 2 AM
FM Mch 4
USB
qP  ush [MEMO] or [SEL] to start memory scan or Mch 1
memory select scan, respectively. Select Mch 5
USB
w Select the desired mode to operate the scan in USB
via the mode switches. Mch 39 USB
Mch 6
• The mode select function is applied to memory or Mch 7
Select
memory select scan. FM
Select
e Push [MEMO] or [SEL] again to stop the scan.

■ Specifying skip channel and frequency

• Specifying skip channels
qS  elect the memory channel to be specified as a SKIP-CH
skip channel. ICOM IC-R8500
w Push [SKIP] for 1 sec. to toggle the setting ON The channel is specified as a ‘skip’ channel.
and OFF.
• SKIP-CH appears when ‘skip’ is set.

• Programming skip frequencies

(for programmed scan) SKIP OFF DLY

q Start programmed scan.

w When the scan pauses on an undesired signal, kHz

push [MW] for 1 sec. RECV PROG0 IC-R8500

• The frequency is memorised into the skip bank as a Push [MW] for 1 sec. while programmed scan pauses.
skip frequency.
• The specified channel is skipped during memory and
memory select scans.
• T he programmed frequency is skipped during pro-
grammed and auto memory write scans.

25
 SCANS 6

■ Automatic bank limit/skip functions

When starting a scan, the following functions are
automatically turned ON by default; and the [SKIP]
and [BANK] switches are deactivated during scan.

•T
 he bank limit function (for memory scan and se- •T
 he skip function (for any scan except priority
lect memory scan)—The memory scan operates scan)—memory channels specified as skip chan-
within the selected bank only. nels are not checked during memory scan and
select memory scan; the frequencies which are
programmed into memory channels as skip chan-
nels (not only in the skip bank but any memory
channels) during programmed scan and auto
memory write scan.

• Turning OFF the automatic The skip function is turned ON automati-

function SKIP AUTO cally at scan start.
q Push [MEMO] for 1 sec. [SKIP] does not function during scan.
• A display as at right appears.
wR  otate the [M-CH] selector The scan skip function is turned ON and
to select the item, SKIP or SKIP MANUAL OFF by [SKIP] regardless of scan start.
BANK.
e R otate the main dial to
select the function AUTO or The bank limit function is turned ON
BANK AUTO automatically at scan start.
MANUAL. [BANK] does not function during scan.
r Push [MEMO] to return to
the previous display.
The bank limit function is turned ON and
BANK MANUAL OFF by [BANK] regardless of scan start.

■ Voice scan control function

This function is useful when you don’t want unmodu-
lated signals pausing or cancelling a scan. When
activated, the receiver checks received signals for VSC appears
voice components.
FM VSC OFF DLY

If a receiver signal includes voice components, and

the tone of the voice components changes within 1 kHz
sec., scan pauses (or stops). If the received signal ICOM- IC-R8500
includes no voice components or the tone of the
voice components does not change within 1 sec.,
scan resumes.
Unmodulated Modulated
To toggle the function ON and OFF, push [VSC]. signal signal
• “VSC” appears while it is activated. Scan edge 1 Scan edge 2

• The VSC function activates for any scan.

• T he VSC function resumes the scan on
unmodulated signals even when the resume Scan Scan pauses or is
condition is set to “OFF” or “∞”. Skip cancelled.

26
 6 SCANS

■ Programming scan edge frequencies

A set of scan edge frequencies must be pro-
grammed before starting the programmed or auto
memory write scans. 10 pairs of scan edges are
available: 0P1 to 9P2. [PROG]
q Push [PROG] for 1 sec. switch
• “*SET*” appears in the bank name area, then
changes to a flashing “PROG.”
wR
 otate the [M-CH] selector to select the lower [MW] switch [M-CH] selector
scan edge in a pair e.g. 0P1.
AM OFF DLY
• The keypad can also be used for selection.
eS  et the frequency, mode, tuning step and mem-
kHz
ory name then push [MW] for 1 sec. to program BANK

one of the scan edges. PROG *NONAME*

r Rotate the [M-CH] selector to select the other
AM OFF DLY
edge in the pair e.g. 0P2.
t Set the frequency then push [MW] for 1 sec. to program.
kHz
• Mode, tuning step and name are common to both scan edges. BANK

y Push [PROG] momentarily to return to the previous PROG *NONAME*

channel; or repeat w to y for other scan edges.

■ Scan speed/delay functions

D Scan resume condition
Scan pauses when finding a signal, and then resumes
or is cancelled depending on the selected scan
OFF DLY
resume condition. There are 3 resume conditions.
Push [DLY] one or more times to select a resume
condition. [DLY D/S ]
switch

• Scan resume OFF

Scan pauses until signal disap- OFF DLY Signal
no signal receiving a signal no signal

pears, then resumes 3 sec. after

that. Scan
scanning pausing scanning
3 sec.

• Scan resume ON with adjusted

delay period OFF DLY Signal no signal receiving a signal no signal
Scan pauses for the adjusted
delay period after receiving a signal, then resumes. Scan pausing
When the received signal disappears, scan resumes scanning scanning
approx. 3 sec. after that. delay time

• Scan cancel
OFF DLY no signal receiving a signal no signal
Scan is cancelled when a signal Signal
is found during scan.
Scan scan is cancelled
scanning

27
 SCANS 6

D Assigning a function to the [DELAY/SPEED] control

The function of the [DELAY/SPEED] control is
selectable, as shown below, to suit your operating
style. Scan speed is assigned to the [DELAY/SPEED] control
qP  ush [DLY ] for 1 sec. to enter the setting con-
dition. VR:SPD DLY= 3S
w Rotate the main dial to select the function for the Adjustable
[DELAY/SPEED] control. Toggle via the via the [M-CH]
e When the scan speed is assigned to the [DELAY/ main dial selector
SPEED] control, the scan delay time is deter-
mined while “VR:SPD DLY: 3S” appears. VR:DLY SPD=MAX
• Rotate the [M-CH] selector to set the delay time.
r Push [DLY ] to return to the previous display. Scan delay is assigned to the [DELAY/SPEED] control

D Scan speed
When scan speed is assigned to the [DELAY/
SPEED] control (see above), the scan speed can be
DELAY/SPEED
instantly updated during scan operation.
The name area shows as at right for 1 sec. after SPEED
rotating the control.
Lowest scan speed: 1 ch/sec.
When scan delay time is assigned to the [DELAY/
DELAY/SPEED
SPEED] control, the scan speed is fixed at the
maximum of 40 ch/sec. SPEED

Highest scan speed: 40 ch/sec.

D Scan delay
The [DELAY/SPEED] control adjusts the scan delay
period (scan resume period) when: DELAY/SPEED

• The scan delay function is assigned to the [DELAY/ DELAY

SPEED] control (see above).
• “DLY” is selected for the scan resume condition Shortest delay time: 3 sec.
with the [DLY ] switch. DELAY/SPEED

When scan speed is assigned to the [DELAY/

DELAY
SPEED] control, the scan delay is determined by
the set value of 3 to 18 sec. Longest delay time: 18 sec.

28
 7 SLEEP TIMER

The IC-R8500 has a sleep timer function to automati-

cally turn the power OFF after a specified period.

[SLEEP/ SET ] switch

D Operation SLEEP

q Push [SLEEP/ ] momentarily, several times, to

activate the sleep timer and set the power OFF period. Minutes
• When the sleep timer is activated, “ ” appears in
the display. SLEEP

•5
 settings are available: 120, 90, 60, 30 min. and sleep
OFF. Each push of Minutes
SLEEP/ SET

after 2 sec.

w2
 sec. after performing step q above, the receiver
returns to the previous display. SLEEP

kHz
ICOM IC-R8500
Previous display

Push SLEEP/ SET once

e To confirm the set sleep period, push [SLEEP/ ]
momentarily, one time.
•B
 e careful not to push the switch more than once, oth- SLEEP

erwise the sleep period may be changed.

Minutes
Set time

r To turn ON the receiver after the sleep timer has

turned power OFF, push [POWER] OFF then ON
again.
• The sleep timer is cancelled.

29
 SET MODE 8
■ General
Set mode is used for programming infrequently
changed values or conditions of functions. The
IC-R8500 has 2 separate set modes: quick set mode
and initial set mode.

D Selecting quick set mode Main dial (for contents)

q Push [SLEEP/ ] for 1 sec.
• Quick set mode is selected and one of its items appears.
w Rotate the [M-CH] control to select the desired item.
e Rotate the main dial to set the values or condi-
tions for the selected item. SCAN SET

r Repeat steps w and e to set other items.

t To exit quick set mode, push [SLEEP/ ] again.
• Pushing any other switch will also exit quick set mode.

[SLEEP/ SET ] [M-CH]

(push for 1 sec.) (for items)

[DISPLAY EXAMPLE: QUICK SET MODE]

WFM OFF DLY

kHz

HIGH DIMMER

Value or Item
condition Item number

D Selecting initial set mode [POWER] Main dial (for contents)

q Push [POWER] to turn power OFF.
w While pushing [SLEEP/ ] push [POWER] to
turn power ON.
• Initial set mode is selected and one of its items appears.
e Rotate the [M-CH] control to select the desired item. SCAN SET

r Rotate the main dial to set the values or condi-

tions for the selected item.
t Repeat steps e and r to set other items.
y To exit initial set mode, push [POWER] to turn
power OFF. [SLEEP/ SET ] at power ON [M-CH]
(for items)
u Push [POWER] to turn power ON again.
• The conditions selected in initial set mode are now
effective. [DISPLAY EXAMPLE: INITIAL SET MODE]

ON REC REMO

Value or Item
condition Item number

30
 8 SET MODE

■ Quick set mode items

DIMMER
This item toggles the intensity of the display back- HIGH LOW
lighting between high or low. Bright backlighting Dark backlighting.
(default).

BEEP
A beep sounds each time a switch is pushed for ON OFF
confirmation. This function can be turned OFF for Confirmation beeps Confirmation beeps
silent operation. ON (default). OFF.

LOCK
This item sets the lock function to electronically DIAL PANEL
lock the main dial only or both the main dial and the Only the main dial Both the main dial and panel
panel switches. can be locked (default). switches can be locked.

AUTO TS
This item sets the auto tuning speed. The main dial ON OFF
normally changes the frequency [400] × [tuning The auto tuning speed The auto tuning speed
step]/ revolution. When auto tuning speed is turned function is ON (default). function is OFF.
on this increases to [2000] × [tuning step]/revolution
during quick rotation of the dial.

HF ANT
This item sets the active HF antenna connector on 50 500
the rear panel. Either the 50 Ω (SO-239 coaxial) or The SO-239 antenna con- The RCA (phono) connector
500 Ω (phono RCA connector) can be activated. nector is activated (default). is activated.

■ Initial set mode items

REC REMO
This item activates/deactivates the REC REMOTE ON OFF
jack on the front panel. When ON is selected, the The REC REMOTE jack The REC REMOTE jack has
[REC REMOTE] jack is at a “low” level when the can be used (default). no function and no relay
squelch opens via the internal relay. switching sound is heard.

REC SPCH
When the optional UT-102 voice synthesizer is ON OFF
installed and scan is in use, the detected frequency The detected frequency is The optional voice synthe-
is announced each time scan pauses, regardless of announced when scan sizer activates via the
the [SPCH/LOCK] switch. This announcement can pauses (default). [SPCH] switch only.
be turned ON and OFF.

31
 SET MODE 8

SPCH LAN
When the optional UT-102 voice synthesizer unit ENG JPN
is installed, you can select between English and Voice synthesizer functions Voice synthesizer functions
Japanese as the language. in English (default). in Japanese.

SPCH SPD
When the optional UT-102 voice synthesizer unit FAST SLOW
is installed, you can select between faster or slower Voice synthesizer output Voice synthesizer output
synthesizer output. is faster (default). is slower.

CIV ADDR
To distinguish equipment, each CI-V transceiver/ 4AH 01H
receiver has its own Icom standard address in hexa- Address set to 4AH Address set to 01H.
decimal code. The IC-R8500’s address is 4AH. (default).
When 2 or more IC-R8500’s are connected to an
optional CT-17 ci-v level converter, rotate the
main dial to select a different address for each
IC-R8500 in the range 01H to 7FH.

CIV BAUD
This item sets the data transfer rate. When “AUTO” AUTO 19200
is selected, baud rate is automatically set according Auto baud rate 19200 bps
to the connected controller or other Icom CI-V radio. (default).

CIV TRAN
Transceive operation is possible with the IC-R8500 ON OFF
connected to an Icom CI-V radio. When “ON” is Transceive ON Transceive OFF.
selected, changing the frequency, operating mode, (default).
etc. on the IC-R8500 automatically changes those of
connected radios and vice versa.

CIV 731
When connecting the IC-R8500 to the IC-735 for OFF ON
transceive operation, you must change the operating Frequency data set to Frequency data set to
frequency data length to 4 bytes. 5 bytes (default). 4 bytes.
• This item must be set to “ON” only when operating trans-
ceive with the IC-735.

32
 9 CONNECTOR INFORMATION

D RS-232C socket Pin Port name Description

1 GND Grounded.
13 1
2 RXD Input port for CI-V format data; +12V/–12V.
3 TXD Output port for CI-V format data; +12V/–12V.
Shorten these ports inside.
25 14 4 RTS
Can be connected to pin 8 (DCD) via the internal
5 CTS
circuit board (‘coffee beans’).
NC; can be connected to pin 20 (DTR) via the
6 DSR
internal circuit board (‘coffee beans’).
7 GND Grounded.
NC; can be connected to pins 4 and 5 (RTS/CTS)
8 DCD
via the internal circuit board (‘coffee beans’).
9–19 NC No connection.
NC; can be connected to pin 6 (DSR) via the
20 DTR
internal circuit board (‘coffee beans’).
21–25 NC No connection.

D Remote jack Pin Port name Description

Inner REMOTE Input/output port for CI-V format data; +5 V/0 V.
Outer
Outer GND Grounded.
Inner

3.5 mm (diam.) 2-conductor

D IF OUT jack Pin Port name Description

Frequency: 10.7 MHz
Inner IF OUT Output level: –60 dBm (with –50 dBm input from
Inner an antenna connector in WFM mode)
Outer GND Grounded.
Outer
RCA (phono) jack

D AGC OUT jack Pin Port name Description

Output voltage: 1 to –2.4 V DC
AGC out (signal strength weak to strong)
Inner Output impedance: 2.2 MΩ
Inner* Output level: 200 mV rms (at Mod.=1 kHz, Dev.=3.5 kHz)
Outer
RCA (phono) jack Output impedance: 4.7 kΩ
Audio detect
• Before the frequency de-emphasis stage.
• Usable for FM only (not including WFM).
Outer GND Grounded.
*Output is selectable with an internal jumper pin (p. 16).

D External speaker Pin Port name Description

Output level: More than 2 W
Outer Inner AF out
Output impedance: 4–8 Ω
Inner Outer GND Grounded.

3.5 mm (diam.) 2-conductor

33
 CONNECTOR INFORMATION 9

D DC 13.8 V and DC IN sockets • DC IN

Pin Port name Description
DC 13.8 V DC IN
Inner DC IN Accepts connection to the AD-55/A/S/V only
4 1 Inner
Outer GND Grounded.

Outer • DC 13.8 V
Pin Port name Description
[POWER]
switch Internal 1 13.8 IN 13.8 V DC input; current consumption 2 A
regulator 12.5 V DC output when connecting AD-55/A/S/V
Receiver circuit 2 12.5 OUT
to [DC IN] socket. Max. 2 A
circuit
3 NC —
4 GND Grounded.

D REC REMOTE jack Pin Port name Description

• Grounded when squelch opens.
Outer
Inner SQL • Can be deactivated via initial set mode. (p. 31)
Inner • Max. current: 1 A/12 V DC
Outer GND —
3.5 mm (diam.) 2-conductor

D REC OUT jack Pin Port name Description

• Output detected audio output.
Outer Inner DET
• 100–300 mV rms/4.7 kΩ
Inner Outer GND Grounded.

3.5 mm (diam.) 2-conductor

D PHONES jack Pin Port name Description

Inner, • Outputs audio.
Outer Audio
Middle • Output impedance: 4–16 Ω

Inner Outer GND Grounded.

Middle
6 mm (diam.) 3-conductor

34
 10 CONTROL COMMANDS

The IC-R8500 can be connected to a PC via the PC’s from the PC and/or transfer data from the receiver to
RS-232C port. This allows you to control the receiver the PC.

■ Command table
Operation Cn Sc Remark Operation Cn Sc Remark
Reading freq. edges 02 — 10 Hz 00
Reading operating freq. 03 — 50 Hz 01
Reading operating mode 04 — 100 Hz 02
Reading M-ch contents package 1A 01 add bn+mc* 1 kHz 03
Reading bank name 1A 03 add bn* 2.5 kHz 04
Reading squelch condition 15 01 5 kHz 05
Reading S-meter level 02 9 kHz 06
Reading model ID 19 00 Tuning step 10 kHz 10 07
Set frequency 05 add fd* 12.5 kHz 08
LSB 0001 20 kHz 09
USB 0101 25 kHz 10
AM 0202 100 kHz 11
AM narrow 0201
Set operating AM wide 0203 1 MHz 12
06 programmable 13
mode CW 0301
CW narrow 0302 OFF 00
FM 0501 10 dB 10
Attenuator 11
FM narrow 0502 20 dB 20
WFM 0601 30 dB 30
Memory channel selection 08 — mc* Voice
frequency 13 00
Bank selection 08 A0 bn* synthesizer
Memory write 09 — AF gain setting 01 add gd*
Set M-ch contents & write package 1A 00 add dt* Squelch level setting 03 add gd*
14
Set bank name 1A 02 add bn+nd* IF shift setting 04 add gd*
Memory clear 0B — APF control setting 05 add gd*
Stop scan 00 AGC OFF 10
Programmed scan start 02 note 1 AGC ON 11
Auto memory write scan start 04 note 1 NB OFF 20
Memory clear 16
Memory scan start 22 note 2 NB ON 21
Select memory scan start 23 note 2 APF OFF 30
Mode select scan start 24 note 2 APF ON 31
Priority scan 42 Power OFF (activating sleep) 00
0E 18
SEL-CH release B0 Power ON (from sleep active) 01
SEL-CH tag B1
Note 1: Only scan group 0 is usable.
VSC deactivation C0 Note 2: U
 se these commands after sending a bank or
VSC activation C1
mode command.
Scan resume selection “∞” D0
Scan resume selection “OFF” D1
Scan resume selection “DLY” D3

■ Data format
• Basic format from PC to IC-R8500 • Answer from IC-R8500 to PC
FE FE 4A E0 Cn Sc Data area (e.g. fd) FD FE FE E0 4A Cn Sc Data area (e.g. fd) FD
Sub command number
Sub command number

End of message code

End of message code

Preamble code (fixed)

(selectable in set mode)

Preamble code (fixed)

(selectable in set mode)

IC-R8500’s address
IC-R8500’s address

Command number
Command number

(‘REMARK’ in table)

BCD code area

BCD code area

PC’s address
PC’s address

(see table)

(see table)

35
 COMMAND LIST 10

• ‘OK’ message from IC-R8500 to PC • ‘NG’ message from IC-R8500 to PC

FE FE E0 4A FB FD FE FE E0 4A FA FD

End of message code

End of message code

IC-R8500’s address

IC-R8500’s address
Preamble code

Preamble code
PC’s address

PC’s address

NG code
OK code

• Memory channel contents set & write (1A 00)

Bank CH no. Frequency Mode(Sc) Tuning step ATT SCN Memory name
FE FE 4A E0 1A 00 1 9 0 1 2 3 9 0 7 8 5 6 3 4 1 2 0 5 0 1 1 3 9 5 1 9 1 0 0 3 4 9 4 3 2 0 5 2 3 8 3 5 3 0 3 0 FD
I C - R 8 5 0 0
(IC-R8500’s command)

End of message code

(only needed when ‘13’
IC-R8500’s address

Command number

BCD code area

Preamble code

Sub command
PC’s address

ASCII code
is selected)
100 MHz
100 kHz

10 MHz
100 Hz

10 kHz

1 MHz
1 GHz
10 Hz

1 kHz
1 Hz

The above data packet is an example of program- Scan skip and select channels
ming the following into memory channel 123 of bank Comment
Scan select Scan skip
number 19: number
00 OFF OFF
• Frequency: 1,234,567,890 Hz
• Mode: FM 01 OFF Specified
• Tuning step: 199.5 kHz (programmable step) 02 Specified OFF
• Attenuator: 10 dB 03 Specified Specified
• Scan select: specified
• Scan skip: specified
• Memory name: IC-R8500
•C
 learing the specified channel data • Special bank number and channels (bn)
(Memory channel contents set & write)
Special bank Bank number Remarks
FE FE 4A E0 1A 00 19 0 1 2 3 FF FD

FREE 20 • For programmed

IC-R8500’s command

End of message code

IC-R8500’s address

scan, channel num-

Command number

AUTO 21 bers are as follows:

Memory channel
Preamble code

0P1=00, 0P2=01,
Bank number
PC’s address

1P1=02, 1P2=03,
SKIP 22
Blank data

etc., up to 9P1=18
number

and 9P2=19.
PROG 23 • There is only one
channel in the prior-
ity bank.
PRIO 24

• Gain and level data (gd; BCD data)

AF GAIN Max. Max.
counterclockwise clockwise
SQUELCH 0000 0255

IF SHIFT Max. center Max.

counterclockwise clockwise
APF control 0000 0128 0255

36
 11 MAINTENANCE

■ Disassembly
For internal maintenance and optional installations,
disassemble the receiver.

CAUTION: DISCONNECT the DC power cable

or AC adapter before performing any work on the
receiver.

qR  emove 6 screws from the top of the receiver

and 4 screws from its sides.
w Carefully lift up the top cover while disconnecting
the plug from the speaker cable.
e Turn the receiver upside down.
r Remove 6 screws from the bottom cover, then lift Speaker
cable
up the bottom cover.

■ Fuse replacement ■ Memory backup

If a fuse blows or the receiver stops functioning, try to All of the CPU’s memory is backed up by an EEP-
find the source of the problem, and replace the dam- ROM (Electronically-Erasable Programmable Read-
aged fuse with a new, rated fuse. Only Memory). All data you set, such as memory
contents, set mode contents, etc. is stored in this
• For DC cable fuse • For internal fuse EEP-ROM. There is no internal lithium battery.

■ CPU resetting
B
FG

If the IC-R8500 is behaving erratically, this may be an

3A

Fuse MAIN unit indication of a CPU malfunction. In such cases, reset

(FGMB 125 V 3 A) the CPU.

While pushing [MW], push [POWER] in to turn on the

receiver power.
• The CPU is reset.
■ Level adjustments
NOTE: Resetting the CPU clears all memory con-
R254 tents and returns internal settings to their factory
R252
defaults.

■ Cleaning
If the receiver becomes dusty or dirty, wipe it clean
with a dry, soft cloth.

AVOID the use of strong chemical solvents such

as thinner, benzine or alcohol to clean the
receiver. These may damage the receiver’s
surfaces.
R252 adjusts the beep level
R254 adjusts the UT-102 output level

37
 OPTIONAL INSTALLATIONS 12
■ UT-102 voice synthesizer unit
The UT-102 announces the accessed frequency in
a clear, electronically generated voice, in English (or
Japanese) when pushing [SPCH] or when a signal
is detected during scan (see p. 31, 32 for settings).
Under the top cover
q Remove the top cover as shown opposite.
w Remove the protected paper attached to the bot- UT-102
tom of the UT-102 to expose the adhesive strip.
e Connect the UT-102 as shown in the diagram at
right. J12
r Replace the top cover.

■ FL-52A cw narrow filter

The IC-R8500 has a CW narrow mode which pro-
vides better S/N (signal-to-noise) and also rejects
nearby interference. The CW narrow filter is helpful
when receiving CW and radio-teletype signals. Under the top cover
q Remove the top cover as shown opposite.
w Connect the FL-52A as shown in the diagram at FL-52A
right.
• Make sure it is connected in the proper orientation.
• Attached nuts on the FL-52A are not necessary. If you
want to install the filter more securely, open the MAIN
unit, then use the nuts on the bottom of the MAIN unit.
e Replace the top cover.

38
 12 OPTIONAL INSTALLATIONS

■ CR-293 high stability crystal unit

A temperature-compensating crystal with a stability of
± 3 ppm is built-in to the receiver. For more demand-
ing operation, the CR-293 high stability crystal
unit is available. It has a stability of ± 0.5 ppm.

q Remove the bottom cover as shown on p. 37.

w Remove 6 screws from the metal plate, then Metal plate
remove the metal plate and shield cover.

Shield
cover

PLL unit

eR  emove 10 screws from the PLL unit, then open CR-293

the unit to expose the bottom. Internal
crystal
r Unsolder the feet of the internal crystal unit, then unit
remove it.
t Place the CR-293 in the space available as
shown in the diagram, then solder its feet into
place (6 points).
y Adjust the reference frequency using a frequency
counter.

PLL unit

uR  eplace the ground spring to its original position. Ground

spring
i Return the shield cover, metal plate and bottom
cover to their original positions.

NOTE: The CR-293 is an oven-type crystal unit,

and the specified frequency stability described
above is guaranteed 1 min. after power ON.

39
 TROUBLESHOOTING 13
The following chart is designed to help you correct solve it through the use of this chart, contact your
problems which are not equipment malfunctions. If nearest Icom Dealer or Service Center.
you are unable to locate the cause of a problem or

PROBLEM POSSIBLE CAUSE SOLUTION REF.

Power does not turn • DC power cable is improperly con- • Reconnect the DC power cable se- p. 8
ON when [POWER] is nected. curely.
pushed in. • A fuse is blown. • Check for the cause, then replace the p. 37
fuse with a spare one.
• During AC adapter operation, the • Connect the jumper connector to the p. 8
jumper connector is not in use. [DC13.8V] jack on the receiver’s rear panel.
POWER

• External 12 V DC is connected to the • Connect the external power source to p. 8

[DC IN] jack. the [DC13.8V] jack. The [DC IN] jack ac-
cepts an AC adapter (AD-55/A/S/V) only.

Receiver turns OFF by • The sleep timer has been activated. • Turn power back ON, then push p. 29
itself. [SLEEP] one or more times to turn the
sleep timer function OFF, if desired.

No sound comes from • Volume level is too low. • Rotate [AF GAIN] clockwise to obtain a —
the speaker. suitable listening level.
• The squelch is closed. • Rotate [SQUELCH] counterclockwise to p. 14
open the squelch.
• An external speaker or headphones are • Disconnect the external speaker or —
connected. headphones.
• CW narrow mode is selected when no • Select another mode or install the op- pgs.
optional lter is installed. tional CW narrow lter. 13, 38

Sensitivity is low. • The coaxial cable is cut. • Fix the coaxial cable. —
RECEIVE FUNCTIONS

• No antenna is connected. • Connect an antenna. p. 8

• The connected antenna is not matched • Connect an antenna matched to the re- p. 8
to the receive frequency. ceiving frequency.
• Wrong antenna connector is used for • Check the antenna connection. p. 8
V/UHF and HF antenna.
• Wrong antenna connector is selected in • Select the proper antenna connector: p. 31
set mode for HF antenna. SO-239 or phono (RCA).
• An RF attenuator is activated. • Push [ATT 10 dB] or [ATT 20 dB] to can- —
cel the function.

Receive signal is un- • [IF SHIFT] is rotated too far CCW or • Set [IF SHIFT] to the center position. p. 14
clear or distorted. CW.
• [APF] is rotated too far CCW or CW. • Set the [APF] control to the center position p. 15
or push the [APF] switch to turn it OFF.
• The wrong mode switch is pushed. • Push the correct mode switch. p. 13

WFM mode cannot be • The operating frequency is lower than • Set the frequency above 30 MHz when p. 13
set. 30 MHz. (WFM mode cannot be se- in WFM mode.
lected below 30 MHz.)

Main dial does not func- • The lock function is activated. • Push [LOCK] for 1 sec. to deactivate. p. 12
FRONT PANEL CONTROL

tion.

[LOCK] does not lock • DIAL LOCK is selected in quick set • Select PANEL LOCK in quick set p. 31
the keypad, function mode. mode.
switches, etc.

The selected frequency • The memory channel was changed be- • Push [MW] for 1 sec. to write into a p. 19
is erased. fore writing into memory. memory before changing channels.

The frequency is not • An optional UT-102 VOICE SYNTHESIZER • Install the UT-102. p. 38
announced when push- UNIT is not installed.
ing [SPCH].

40
 13 TROUBLESHOOTING

PROBLEM POSSIBLE CAUSE SOLUTION REF.

Memory channels in • The bank limit function is activated and • Push [BANK] to turn OFF the bank limit p. 18
another bank cannot be “BANK” is indicated. function or use [BANK] or [BANK] to se-
selected. lect the bank.
MEMORY CHANNELS

Memory channels in the • Written memories condition is set as • Change the setting to START. p. 24
‘AUTO’ bank are CL&START.
cleared.

Bank name is erased • [CE ≈] is pushed on the final name • Push [ENT] after setting the name. p. 20
after setting. character.

Memory name cannot • A frequency has not yet been pro- • Push [MW] for 1 sec. in advance. p. 19
be written. grammed into the memory channel.
• [MW] key is used for name programming. • Push [ENT] after setting the name. p. 20

No scan will function. • [SQUELCH] is open and [∞] is selected. • Turn [SQUELCH] CW until noise disap- p. 14
pears.

Programmed scan and • The same frequencies are programmed • Reprogram different frequencies into p. 27
auto memory write scan into the selected scanning group. scan edge channels or select a different
does not function. programmed scan group.

Memory scan does not • All channels are specified as “SKIP” • Turn OFF the automatic skip function or pgs.
function. channels in the selected bank. release the “SKIP” setting for 2 or more 25, 26
channels in the selected bank.
SCAN

• No memory channels have yet been • Program 2 or more channels in the se- p. 19
programmed in the selected bank. lected bank.

Select memory scan • Two or more “SEL-CH” are not specified • Set 2 or more channels as “SEL-CH” in p. 23
does not function. in the selected bank. the selected bank.

Auto memory write • All channels in the auto memory bank • Erase some or all of the channels in the p. 24
scan does not function. have been programmed. auto write bank.

Scan starts automati- • The AFC function is activated and an • Push [AFC] to turn the AFC function p. 14
cally. off-center signal is received in FM or OFF or wait until the center frequency is
WFM mode. selected.

41
 SPECIFICATIONS 14
■ General
• Frequency coverage : Version Frequency Coverage (MHz)
U.S.A. 0.10000 – 823.99999
849.00001 – 868.99999 894.00001 – 1999.99999*
Europe,
0.10000 – 1999.99999*
China, Other
France 0.10000 – 87.50000 108.00000 – 1999.99999*
*Specifications guaranteed 0.1–1000 MHz and 1240–1300 MHz
• Mode :F M (normal/narrow), AM (wide/normal/narrow), SSB (USB/LSB) CW (normal/narrow*), WFM
*Optional FL-52A is required.
• Number of memory channels : 1000 (plus 20 scan edges and 1 priority channel)
• Antenna connector : Below 30 MHz SO-239 (50 Ω)/Phono (500 Ω)
Above 30 MHz Type-N (50 Ω)
•U  sable temperature range : –10°C to +50°C (+14°F to +122°F)
• Frequency stability : Below 30 MHz ±100 Hz (±20 Hz*)
Above 30 MHz ± 0.0003 % (±0.00006%*)
*When an optional CR-293 is installed.
• Power supply requirement : 13.8 V DC ±15% (negative ground)
• Current drain (at 13.8 V DC) : Standby 1.8 A Max. audio 2.0 A
• Dimensions (projections not included) : 287(W) × 112(H) × 309(D) mm; 115⁄16(W) × 413⁄32(H) × 123⁄16(D) in
• Weight : 7.0 kg (15.4 lb)
• Intermediate frequencies : Frequency band 1st 2nd 3rd* Unit: MHz
0.1– 29.99999 48.8 10.7 0.455
30.0– 499.99999 778.7 10.7 0.455
500.0– 1024.99999 266.7 10.7 0.455
Utilizes converter method:
1025.0– 1999.99999
Local freq.: 500, 1000 or 1010 MHz *Except WFM
■ Receiver
• Receive system : Superheterodyne
• Sensitivity : Frequency band (MHz) SSB/CW AM AM-N AM-W FM WFM
0.1–0.49999 1.0 µV 6.3 µV — — — —
0.5–1.79999 2.0 µV 13.0 µV — — — —
1.8–1.99999 0.25 µV 3.2 µV 2.5 µV — — —
2.0–27.99999 0.2 µV 2.5 µV 2.0 µV — — —
28.0–29.99999 0.2 µV 2.5 µV 2.0 µV — 0.5 µV —
30.0–999.99999 0.32 µV 2.5 µV 2.0 µV 3.2 µV 0.5 µV 1.4 µV
1240.0–1300.00000 0.32 µV 2.5 µV 2.0 µV 3.2 µV 0.5 µV 2.0 µV
• Squelch sensitivity :
Frequency band SSB/CW/AM-N AM/AM-W FM WFM
(MHz) threshold tight threshold tight threshold tight threshold tight
1.8–29.99999 10 µV 320 mV 0.5 µV 320 mV 0.5 µV* 320 mV* — —
30–1000 4.5 µV 320 mV 0.4 µV 320 mV 0.4 µV 320 mV 4.5 µV 320 mV
1240–1300
*FM mode can only be used above 28 MHz.
• Selectivity : WFM More than 150 kHz/–6 dB
FM/AM-W More than 12 kHz/–6 dB
FM-N/AM More than 5.5 kHz/–6 dB
AM-N/SSB/CW More than 2.2 kHz/–6 dB
CW narrow* More than 500 Hz/–6 dB
*Optional FL-52A is required.
• Spurious and image rejection ratio : Below 30 MHz More than 60 dB
30–1000 MHz 50 dB (typical)
1240–1300 MHz
•A  udio output power : More than 2.0 W at 10% distortion with an 8 Ω load
• IF shift variable range : More than ±1.2 kHz
• External speaker connector : 2-conductor 3.5 mm (1⁄8")/4–8 Ω

All specifications are subject to change without notice or obligation.

42
 15 OPTIONS

AH-7000 AH-8000
SUPER WIDEBAND SUPER WIDEBAND
OMNIDIRECTIONAL OMNIDIRECTIONAL
ANTENNA ANTENNA
Frequency coverage: Frequency coverage:
Receive 25–1300 MHz Receive 100–3300 MHz
Transmit 50, 144, 430, 900, Transmit 118–137, 144–148, 222–
1200 MHz bands 225, 430–450, 902–928,
Type of antenna: Discone 1240–1300 2300–2450 MHz
Weight: approx. 1000 g Type of antenna: Discone
Weight: approx. 970 g

AH-710 FOLDED DIPOLE ANTENNA SP-21 EXTERNAL SPEAKER

ft
0.3
m; 8
24.5
rox.
app Designed for base station opera-
tion.
• Input impedance: 8 Ω
• Max. input power: 5 W
Covers from 1.9 to 30 MHz band. Has an SO-239 con-
nector. Easy to assemble (non-kink construction).

SP-23 EXTERNAL SPEAKER MB-23 CARRYING HANDLE

Carrying handle, conven-
ient for portable opera-
4 audio filters; headphone tion. Use the screws sup-
jack; can connect to 2 radios. plied with the IC-R8500;
• Input impedance: 8� Ω DO NOT use the screws
• Max. input power: 4 W supplied with the MB-23.

AD-55/A/S/V AC ADAPTER
CT-17 CI-V LEVEL CONVERTER
Provides AC operation.
For remote control of up (AD-55 or AD-55S EUR version only)
to 4 receivers from 1 PC.
You can set memory con-
CR-293 HIGH STABILITY CRYSTAL UNIT
tents, including names, as
well as read data from the Provides improved frequency stability.
receivers. • Frequency stability: ± 5 ppm (0°C to +60°C; 32°F to +140°F)

FL-52A CW NARROW FILTER

(455 kHz; 500Hz/–6 dB)

UT-102 VOICE SYNTHESIZER UNIT

MB-12 MOBILE MOUNTING BRACKET

Approved Icom optional equipment is designed for

optimal performance when used with an Icom receiv-
er.
Icom is not responsible for the destruction or damage
Receiver mounting bracket for mobile operation. to an Icom receiver in the event the Icom receiver
Not available in European countries due to local regulations. is used with equipment that is not manufactured or
approved by Icom.

43
 DOC 16

DECLARATION
OF CONFORMITY

We Icom Inc. Japan

1-1-32, Kamiminami, Hirano-ku
Osaka 547-0003, Japan
Declare on our sole responsibility that this equipment complies with the
essential requirements of the Radio and Telecommunications Terminal Bad Soden 10th Mar. 2010
Equipment Directive, 1999/5/EC, and that any applicable Essential Test Place and date of issue
Suite measurements have been performed.
Kind of equipment: COMMUNICATIONS RECEIVER Icom (Europe) GmbH
Communication Equipment
Auf der Krautweide 24,
Type-designation: iC- r8500 65812 Bad Soden am Taunus,
Germany
Authorized representative name
Version (where applicable):
Y. Furukawa
This compliance is based on conformity with the following harmonised
General Manager
standards, specifications or documents:
i) Article 3.1a EN 60950-1: 2001
ii) Article 3.1b EN 301 489-1 and EN 301 489-15
iii) Article 3.2 EN 301 783-2
iv)
v) Signature

44
 #33 EUR <Intended Country of Use>
■ GER ■ FRA ■ ESP ■ SWE
■ AUT ■ NED ■ POR ■ DEN
■ GBR ■ BEL ■ ITA ■ FIN
■ IRL ■ LUX ■ GRE ■ SUI
■ NOR

A-5395H-1EX-t
Printed in Japan
© 1996–2010 Icom Inc.
Printed on recycled paper with soy ink. 1-1-32 Kamiminami, Hirano-ku, Osaka 547-0003, Japan