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A1.190415
XT-818
MOBILE RADIO
Instruction Manual
 CONTENTS
FUNCTIONS AND CHARACTERS.........................................1
ACCESSORIES......................................................................2
INITIAL INSTALLATION.........................................................3
GETTING ACQUAINTED........................................................10
WORKING MODE AND MENU FUNCTION...........................13
BASIC OPERATION...............................................................14
SHORTCUT OPERATION......................................................17
PROGRAMMING SOFTWARE...............................................25
MAINTENANCE......................................................................26
SPECIFICATIONS...................................................................28
 1. FUNCTIONS & FEATURES
XT-818 Mobile Radio has nice housing, stoutness & stability,
advanced and reliable functions, perfect & valuable. This amateur
mobile radio especially designs for drivers and it pursues company
philosophy of innovation and practicality.
More functions as follows:
• There are Amateur operation mode and Professional operation
mode for option.
• Adopt superior quality material, better technology and high quality
radiator to ensure stable and durable operation.
• 199 programmable memorized channels, identified by editing
name.
• Various scan functions including CTCSS/DCS Scan function.
• Automatic calling Identification function by CTCSS or DCS
signaling.
• Different band width per channel, 25K for wide band, 12.5K for
narrow band.
• Frequency Step 2.5K, 5K, 6.25K, 10K, 12.5K, 20K, 25K, 30K, 50K

1
2. ACCESSORIES
2.1 Standard Accessories

VOL

Install bracket Fuse(5A 250V)

Radio

non-slip mat User Manual Microphone Hanger

Adjusting screws Screws Pads

2.2 Optional Accessories

PC cable Regulated Power

8 ohm speaker Programming Software Car Antenna

2
 3. Initial Installation
3.1 Mobile Installation
To install the transceiver, select a safe, convenient location inside
your vehicle that minimizes danger to your passengers and yourself
while the vehicle is in motion. Consider installing the unit at an
appropriate position so that knees or legs will not strike it during
sudden braking of your vehicle. Try to pick a well ventilated location
that is shielded from direct sunlight.

1. Install the mounting bracket in the vehicle using the supplied self-
tapping screws (2pcs) and flat washers (2pcs).
Car body

Washer (M5)
Tapping screw
(M5x20mm)

Mounting bracket

2. Position the transceiver, then insert and tighten the supplied

hexagon SEMS screws.
Double check that all screws are tightened to prevent vehicle
vibration from loosening the bracket or transceiver.

VOL

3
3.2 Intall Microphone Hanger
1. Choose idea location and mark for screw point.
2. Fix the hanger by the srews in accessory list.

3.3 Power Connection

»»Locate the power input connector as close to the transceiver as
possible.
Mobile Operation
The vehicle battery must have a nominal rating of 12V. Never connect
the transceiver to a 24V battery. Be sure to use a 12V vehicle battery
that has sufficient current capacity. If the current to the transceiver
is insufficient, the display may darken during transmission, or
transmitting output power may drop excessively.

1. Route the DC power cable supplied with the transceiver directly

to the vehicle's battery terminals using the shortest path from
the transceiver.
• We recommend you do not use the cigarette lighter socket as some
cigarette lighter sockets introduce an unacceptable voltage drop.
• The entire length of the cable must be dressed so it is isolated from
heat, moisture, and the engine secondary (high voltage) ignition
system/ cables.

2. After installing cable, in order to avoid the risk of damp, please

use heat-resistant tap to tie together with fuse box. Don't forget
to reinforce whole cable.

4
3. In order to avoid the risk of short circuit, please cut down
connection with negative (-) of battery, then connect with radio.

4. Confirm the correct polarity of the connections, then attach

the power cable to the battery terminals; red connects to the
positive (+) terminal and black connects to the negative (-)
terminal.
• Use the full length of the cable without cutting off excess even if the
cable is longer than required. In particular, never remove the fuse
holders from the cable.

5. Reconnect any wiring removed from the negative terminal.

Red

Black

6. Connect the DC power cable to the transceiver's power supply

connector.
• Press the connectors firmly together until the locking tab clicks.

EXT SP

ANT

DC power cable
Ext. Power jack

5
Fixed Station Operation
In order to use this transceiver for fixed station operation, you will
need a separate 13.8V DC power supply (not included), power
supply( QRP-01) as optional accessories. Please contact local dealer
to require.
The recommended current capacity of your power supply is 10A.
1. Connect the DC power cable to the regulated DC power supply
and ensure that the polarities are correct. (Red: positive, Black:
negative).
• Do not directly connect the transceiver to an AC outlet.
• Use the supplied DC power cable to connect the transceiver to a
regulated power supply.
• Do not substitute a cable with smaller gauge wires.
Regulated
power supply
(QRP-01) EXT SP

ANT

Red
Black
Regulated power supply (QRP-01)

DC power cable with fuse holder (QPL-01)

2. Connect the transceiver's DC power connector to the connector

on the DC power cable.
»»Press the connectors firmly together until the locking tab clicks.
»»Before connecting the DC power to the transceiver, be sure to
switch the transceiver and the DC power supply OFF.
»»Do not plug the DC power supply into an AC outlet until you
make all connections.

6
3.4 Fuse Replacement
This radio adopt 5A, 250V fuse.
If the fuse blows, determine the cause, then correct the problem.
After the problem is resolved, replace the fuse. If newly installed
fuses continue to blow, disconnect the power cable and contact your
autho-rized dealer or an authorized servi-
cecenter for assistance.
1. Open the fuse holder
, 250V FUSE
IN-LINE
FUSE HOLDER
5A

2. Replace the fuse and screw on the holder.

IN-LINE
FUSE HOLDER

IN-LINE IN-LINE
FUSE HOLDER FUSE FUSE HOLDER

Fuse Location Fuse Current Rating

Transceiver 5A
Supplied Accessory DC
5A
power cable
Only use fuses of the specified type and rating, otherwise the
transceiver could be damaged.

»»If you use the transceiver for a long period when the vehicle
battery is not fully charged, or when the engine is OFF, the
battery may become discharged, and will not have sufficient
reserves to start the vehicle. Avoid using the transceiver in
these conditions.

7
3.5 Antenna Connection
Before operating, install an efficient, well-tuned antenna. The success
of your installation will depend largely on the type of antenna and its
correct installation. The transceiver can give excellent results if the
antenna system and its installation are given careful attention.
Use a 50Ω impedance antenna and low-loss coaxial feed-line that
has a characteristic impedance of 50Ω, to match the transceiver
input impedance. Coupling the antenna to the transceiver via feed-
lines having an impedance other than 50Ω reduces the efficiency of
the antenna system and can cause interference to nearby broadcast
television receivers, radio receivers, and other electronic equipment.
»»Transmitting without first connecting an antenna or other
matched load may damage the transceiver. Always connect the
antenna to the transceiver before transmitting.
»»All fixed stations should be equipped with a lightning arrester to
reduce the risk of fire, electric shock, and transceiver damage.
The possible locations of antenna on a car are shown as following:

3.6 Accessories Connections

External Speaker
If you plan to use an external speaker, choose a speaker with an
impedance of 8Ω. The external speaker jack accepts a 3.5mm (1/8")
mono (2-conductor) plug.

SP-01
EXT SP

ANT

8
 »»External speaker adopt double port BTL, please care about the
connecting way. The speaker can not connect with the ground,
otherwise the speaker will be fault. The wrong connecting way
as the following picture.

Error

SP-01 Ground
EXT SP

ANT

PC Connecting
To utilize the optional XT-818 software, you must first connect the
transceiver to your PC then using an optional programming cable .
Please use XT-818 software for programming.
»»Ask your dealer about purchasing a Programming Cable .

9
4. GETTING ACQUAINTED
4.1 Front Panel
6 8 7

FUN V/M SCA SQL

1 2 3 4

Basic Function
NO. Knob Function
1 FUN Function Menu key
2 V/M VFO/Memory mode switch key
3 SCA Scan Key
4 SQL Squelch key
5 VOL Power on/off and volume key
6 RX indicator Light on when squelch valid
7 TX indicator Light on when TX
8 LCD display Display channel / frequency / function setting
9 Speaker Listen to calls

Press Fun key until F icon appears then press following key
NO. Knob Function
1 V/M Channel store
2 SCA Channel scan delete or add
3 SQL CTCSS/DCS setting
4 VOL Keypad lock

Hold Fun key then press following key

NO. Knob Function
1 V/M Delete memory channel
2 SQL Voltage display function

10
Keep press following key
NO. Knob Function
1 FUN Enter setting mode after hold it for 2 seconds
2 SQL Turn monitor

4.2 Rear Panel

1

NO. Knob Function

Antenna
1 Connect a 50Ω antenna
connector
External
2 Connect optional SP01 external speaker
Speaker jack
3 Power cable Connect a standard DC power cable

11
4.3 Display
11 12
1 2 3 4 5 6 7 18 8 9

10 21

20

13 14 15 16 17 19

1.F: Display when press FUN key

2.CT: Display when setting CTCSS
3.T: Display when setting TX CTCSS
4.DCS: Display when setting DCS
5.+: Display when setting positive offset direction
6.-: Display when setting negative offset direction
7.R: Display when turn on reverse frequency function
8.N: Display when setting narrow band
9. :Display when setting keypad lock function
10.H: Display when setting high power
11.M: Display when setting middle power
12.L: Display when setting low power
13.188: Display memory channel number in memory mode
14.Decimal point: Display when store channel indicate empty channel
15.Decimal point: Display this icon when setting channel scan skip
16.Decimal point: Indicates the decimal point of frequency and the
scanning function
17.Decimal point: Display this icon when setting CTCSS/DCS scan
18.888888: Indicate frequency or memory channel name
19.25/5/75: Display this icon when indicates the end of the frequency.
20.BUSY: Display when receive the signal or turn on the monitor
function
21.RSSI: Display TX/RX signal strength

12
 5. Working mode and Menu function
According to practical application, you can set the radio works as
Amateur Transceiver mode or Professional Transceiver mode. There
are also 2 levels operation menu to set functions as you need. It
is easy and convenient (From No.1 to No. 10 are channel function
setup, From No.11 to No.20 are general setting setup).

5.1 Working Mode

A. By programming software: In PC software's "General Setting"
menu, choose "Display Mode" to select Amateur Transceiver
mode or Professional Transceiver mode.
B. By manual setup: Please refer to "Display Mode" in Page 23.

5.2 Amateur Transceiver Mode

Except setting as "CH" mode, others considered as Amateur
transceiver mode. Under this mode, press [V/M] key to switch
between Channel mode and VFO mode.
A. Frequency + Channel mode: When set display as "FR", it enters
into Frequency+ Channel mode. Under this mode, new setting
of channel operation and shortcut operation can be temporarily
used by user. Once the radio is turned off or switched to another
channel, the temporary setting will be erased and back to initial
settings. If the program software’s channel store is valid, the
Shortcut operation and channel setting will be changed & stored
as the latest value permanently. Once the radio is turned off or
changed to new VFO frequency, the latest setting is remained until
next change.
B. Channel+ Name Tag Mode: When set display as "NM", it enters
into Channel +Name Tag mode. At this mode, it will display
corresponding channel name when the current channel is edited
with name. Otherwise, it will display frequency + channel. Its
operations are the same as frequency + channel mode.
C. VFO Mode(Frequency mode): Under this mode, the Shortcut
operation and channel setting will be changed & stored as the
latest value permanently. Once the radio is turned off or changed
to new VFO frequency, the latest setting is remained until next
change.

13
5.3 Professional Transceiver Mode
When set display mode as "CH", it enters into Professional
Transceiver mode. At this mode, except scan, other shortcut operation
can't operate. And from No.1-10 menu in function setting will be auto
hidden. They should be set by PC software. If there is corresponding
name for current channel, the LCD will display current channel name
Otherwise, it shows current channel number.
»»If transceiver programmed as professional transceiver mode
and locked, you can't return to amateur transceiver mode by
manual operation from general setting.

5.4 Under Every Mode

From No. 11-20 menu in general setting can be changed and saved.

6. Basic operation
6.01 Switching the Power On/Off
When the transceiver in power off, press [VOL] key to power on or
base on function menu APO set as power on once connect the power,
then hold [VOL] key for 2 seconds to power off.

6.02 Power Voltage Display Function

After the transceiver connect the power cable, press [FUN] key and
[SQL] key same time for 1 second can confirm current power voltage,
then you can see the voltage data from the LCD display. The LCD
display voltage will change once the power voltage has changed.
»»The display voltage range is from 9V to 17V, the display data is
a rough data, if you need exactly data pls use the voltmeter to
test.

14
6.03 Adjusting the Volume
When the transceiver in power on, turn VOL knob, the LCD display
VOL-XX, XX means volume level, can increase or decrease the
volume, turn clockwise VOL knob can increase the volume, turn
anticlockwise VOL knob to decrease volume. When set the volume as
1st level, then the transceiver in mute status.

6.04 Switch Between VFO and Channel Mode

In standby, press V/M until LCD appears M. this indicates the radio
is in channel mode. Repeate above operation to switch between
frequency mode(VFO) and channel mode.

6.05 Adjusting Frequency/Channel

1. In frequency mode, Short press [UP] or [DN] key to increase or
decrease frequency. Hold [UP] or [DN] to fast increase or decrease
frequency. Short press [VOL], the MHz will flash, hold [UP] or
[DN] key will change the frequency move by 1 MHz. Press [VOL]
key again, the MHZ will flash, hold [UP]/[DN] key will change the
frequency move by 10MHZ, press any key exit this mode.
»»2.5K, 5K, 6.25K, 10K, 12.5K, 20K, 25K, 30K and 50K total nine
step size available for this radio.
2. In channel mode, short press [UP] or [DN] key to increase or
reduce channel by one step. Hold [UP] or [DN] key to fast increase
or reduce channel.

6.06 Receiving
When the channel you are operating being called, the screen shows
BUSY icon and field strength. The green RX indicator light on, in this
way you can hear the calling.
»»If the transceiver has set at higher squelch level, it may fail to
hear the calling.

15
If the transceiver LCD display BUSY icon and field strength, the green
LED Rx indicator flashes, but can not hear the calling, it means has
receive matching carrier but with unmatching signaling ( Pls reference
CTCSS/DCS encode and decode for operation).

6.07 Transmitting
Hold [SQL] key to monitor for a while, to confirm the current channel
is not busy, then release [SQL] key and back to standby state .
Hold [PTT] key and speaker into microphone. Hold the microphone
approximately 2.5-5.0cm from your lips and speak into the
microphone in your normal speaking voice to get best timbre.
»»Hold PTT key, the LED lights red and power strength show in
the screen, indicates it is transmitting, release PTT to receive.

6.08 Channel Edit

1. In VFO mode, press [UP]/[DN] or [VOL] to choose wanted frequency.
2. Press [FUN] key+ [SQL] to enter CTCSS/DCS setup. Press [UP] /
[DN]or [VOL] to select desired signaling.
3. Enter channel menu No 1-10 and choose related setup.
4. Press [FUN] key, the LCD displays F icon, if the channel number
flash means current channel number is valid. If M icon flashes means
current channel number is empty.
5. Press [UP] / [DN] key or turn VOL knob choose wanted channel
number.
6. Press [V/M] key store the channel, the decimal point icon disappear,
the channel number no flash and emit a prompt, it means the channel
stored success.

6.09 Channel Delete

1. In channel mode, press [UP] / [DN] to choose a unwanted channel.
2. Hold [FUN] and [V/M] key for over 1 second, the current channel
will be deleted, the radio emit a prompt and jump to next working
channel.

16
7. Shortcut operation
7.01 Squelch Off / Squelch Off Momentary
SQL key programmed as Squelch Off or Squelch Off Momentary to
monitor the weak signal.
1. Squelch Off: Press [SQL] key to disable squelch, press [SQL] key
again to resume squelch.
2. Squelch Off Momentary: Press [SQL] key to disable squelch,
release key to resume squelch.
»»The above functions should be set in program software.

7.02 Squelch Level Setup

This function use for setting RX signal strength, the calling will be
heard only when reach set level, otherwise the radio will keep mute.
1. In standby, hold [SQL] key, then short press [UP]/[DN] or turn VOL
Knob, the LCD displays current squelch level.
2. Press [UP]/[DN] or turn VOL knob to choose wanted squelch level.
3. Press any key to confirm and exit.

7.03 Frequency Scan

In frequency (VFO) mode, this function is designed to monitor signal
of all frequency points under each step size.
1. In VFO mode, short press [SCA] to start frequency scan.
2. Short press [UP] or [DN] to change scan direction.
3. Short press [UP]/[DN] key or any other key except the volume knob
to exit scan.
7.04 Channel Scan
In channel mode, this function is used to monitor signal in all channels.
1. In channel mode, Press [SCA] key start channel scan.
2. Short press [UP]/[DN] key to change scan direction.
3. Short press [UP]/[DN] key or any other key except the volume knob
to exit scan.

17
7.05 Scan Skip
In channel mode, separately short press [FUN] key and [SCA] key to
add or delete a scan channel.
1. Decimal point between frequency's ten digit and unit digit
disappears, the current channel added to scan list. this channel will
be scanned when scan function start.
2. Decimal point display between frequency's ten digit and unit digit,
the current channel is deleted from scan list, this channel will not
be scanned when start scan function.

7.06 CTCSS/DCS Encode and Decode Setup

Separately short press [FUN] key and [SQL] key to enter CTCSS/
DCS encode/decode menu, repeatedly short press [SQL], to set
CTCSS/DCS encode/decode for current channel.
1. When the LCD displays T , means current channel set with CTCSS
encode, press [UP]/[DN] key or turn VOL knob to choose wanted
encode.
2. When the LCD displays CT, means current channel set with
CTCSS encode/decode, press [UP]/[DN] key or turn VOL knob to
choose wanted CTCSS decode.
3. When the LCD displays DCS, means current channel set with DCS
encode/decode, press UP/DN key or turn VOL knob to choose
wanted DCS encode/decode.
4. CTCSS code: 62.5-254.1 total 51 groups. DCS code: 000N-777I
total 1024 groups, N is positive code, I is inverse code. Press V/M
to choose positive code or inverse code.
5. Press [UP]/[DN] key or any other key except volume knob to exit.

»»Under channel mode, this operation can be temporarily used

by user. Once the radio is turned off or switched to another
channel, the temporary setting will be erased. If the channel
setting programmed for valid, the temporary setting will keep
valid until next change, turn off radio or switch to another
channel, the temporary setting will not changed.

18
7.07 CTCSS Scan
Separately short press [FUN] key and [SOL] key to enter CTCSS/
DCS encode/decode menu, repeatedly short press [SQL] key until
LCD displays CT, short press [SCA] key can enter CTCSS scan
mode. Short press [UP] or [DN] key can change the scan direction,
Once finding a matching CTCSS signaling, it will stop for 5S then
scan again. Press any key to exit.

7.08 DCS Scan

Separately short press [FUN] key and [SQL] key to enter CTCSS/
DCS encode/decode menu, repeatedly short press [SQL] key until
LCD displays DCS, short press [SCA] key to enter DCS scan mode.
Short press [UP] or [DN] key can change the scan direction. Once
finding a matching DCS signaling, it will stop for 5S then scan again.
Press any key to exit.

7.09 Keypad Lockout

Avoiding unintentional operation, this function will lock the keys
except [PTT] key and [FUN] key.
1. Short press [FUN] key the LCD displays F icon, press [VOL] key
again the LCD displays Lock means the keypad is locked.
2. Repeate above operation, when Lock icon disappears, means the
keypad is unlocked.

7.10 Function Menu

1. Hold [FUN] key for over 2S to enter function menu.
2. Short press [UP]/[DN] or turn VOL knob to switch menu option.
3. Short press [VOL] key to enter 2nd level menu setup
4. Short press [UP]/[DN] key or turn VOL knob to choose current
setting.
5. Short press any key to store and exit.
»»There are 2 part of function menu: part 1, Menu No. 1-10
channel function menu. part 2 Menu No. 11-20 function menu.
Part 1 will automatically hide in channel mode by program
software.

19
7.11 Signaling Combination Setup
Enter No. 01 function menu, the LCD displays "SKP". This function
can improve the level of blocking irrelative signals.
SQ: You can hear the calling when receive a matching carrier.
CTC: You can hear the calling when receive a matching carrier and
CTCSS/DCS signaling.
Default: SQ
»»This setting is valid only when CTCSS/DCS signaling added.

7.12 HIGH/MID/LOW Power Selection

Enter No. 02 function menu , the LCD displays "POW". This function
use to control transmit power level.
HI: Transmit with high power.
MI: Transmit with middle power.
LO: Transmit with low power.
Default: HI.
7.13 Band-width Selection
Enter No 03 function menu , the LCD displays "BNAD".
Select suitable bandwidth in accordance with different local conditions
WIDE: band width is 25k(Wide band)
NAR: band width is 12.5k(Middle band)
Default: WIDE.

7.14 Busy Channel Lockout

Enter No 04. function menu , the LCD displays "BUSY".
BCLO is to disable transmitting while RX signal is received. Once the
channel is busy and you press [PTT], the radio will beep as warning
and get back to receiving.
BU: Enable BCLO, Carrier lockout, transmitting is inhibited when
current channel receives a matching carrier; press [PTT] to emit error
voice prompt and back to receiving mode.
RL: Enable BTLO, transmitting is inhibited when current channel
receives a matching carrier but dis-matching CTCSS/DCS. Press
[PTT] key to emit error voice prompt and back to receiving mode.
OFF: BCLO is disabled. It can transmit in any receiving status.
Default: OFF.
20
7.15 Editing Channel Name
Enter No.05 function menu , the LCD displays "NAME".
1. Press [UP]/[DN] or turn VOL knob to choose character for present
cursor location.
2. Press [V/M] key to confirm and move to next character edit.
3. Press [FUN] key to return to last character edit.
»»In Frequency (VFO) mode ,this function will be auto-hidden.

7.16 TX OFF
Enter No.06 function menu , the LCD displays:"TX".
This function use to disable the transmitting for current channel.
ON: TX allowed, press [PTT] to transmit.
OFF: TX not allowed, press [PTT] will emit a wrong report.
Default: ON.

7.17 Reverse Frequency

Enter No.07 function menu , the LCD display "REV".
When turn on this function, the TX frequency turns to RX frequency &
RX frequency changes to TX frequency. The signaling will reverse if
CTCSS/DCS signaling existed in this channel.
ON: Turn on reverse function
OFF: Turn off reverse function
Default: OFF.

7.18 Talk Around

Enter No.08 function menu , the LCD displays "TALK".
This function enable direct communication with other radios in case
the repeater is not activated or when out of the repeater range.
The transceiver will transmit by RX frequency with its CTCSS/DCS
signaling.
ON: Turn on talk around function
OFF: Turn off talk around function
Default: OFF.

21
7.19 Offset Direction Setup
Enter NO.09 function menu, the LCD display "SHIFT".
Repeater receives a signal(UP-LINK) on one frequency and
retransmits on another frequency(DOWN-LINK). The difference
between
these two frequencies is called the offset frequency. If the UP-LINK
frequency is higher than DOWN-LINK frequency, the direction is
positive, If it is lower, the shift direction is negative.
+: it indicates positive offset, which means transmitting frequency
higher than receiving frequency.
-: it indicates negative offset, which means transmitting frequency
lower than receiving frequency.
OFF: Turn off offset direction function
Default: OFF.

7.20 Offset Frequency Setup

Enter NO.10 function menu, the LCD displays "OFFSET"
0-90: Total 90MHZ frequency range available
Default: 5.0MHz
»»The offset frequency change base on the frequency step
setting.

7.21 Frequency Step Size Setup

Enter No.11 function menu , the LCD displays "STEP".
This function is valid only in frequency (VFO) mode, input frequency
or frequency scanning are restricted by frequency step size.
Total 9 frequency step size available: 2.5K, 5K, 6.25K, 10K, 12.5K,
20K, 25K, 30K and 50K.
Default: 25K
»»This function is auto-hidden in memory mode.

22
7.22 Display Mode Setup
Enter No.12 function menu , the LCD displays "DSP".
This radio has 3 different dispaly modes:
FRQ: Frequency+Channel mode ( Amateur transceiver mode)
CH: Channel mode
NM: Channel+Name Tag mode (Amateur transceiver mode),
if channel not named ( Amateur transceiver mode), it displays
Frequency+Channel mode.
Default: FRQ.
»»This function will be auto-hidden if channel mode locked.(Refer
to programming software).
7.23 BEEP Prompt Setup
Enter No.13 function menu, the LCD displays "BEEP".
The prompt function is confirm the transceiver’s operation, it will emit
BEEP prompt sound when with wrong operation.
ON: Turn on BEEP prompt function
OFF: Turn off BEEP prompt function
Default: ON.
7.24 TOT(Time Out Timer)
Enter No.14 function menu , the LCD displays "TOT".
The time-out timer limits continuous transmitting time. When transmit
time exceed programmed value, the transmitting will stop and emit a
prompt.
1-30: 1-30 minutes range available by 1 minute/step
OFF: Turn off TOT function.
Default level: 03.
7.25 APO Setup
Enter No.15 function menu , the LCD displays "APO".
Once APO is activated, the radio will be automatically switched off
when the preset timer is running to end.
30: Auto power off after 30m
60: Auto power off after 1h
120: Auto power off after 2h
OFF: Disable Auto power off
Default: OFF.
23
7.26 Squelch Level Setup
Enter No.16 function menu , the LCD displays "SQL"
This function use for setting RX signal strength, the calling will be
heard only when reach set level, otherwise the radio will keep mute.
OFF-09: Total 10 levels, OFF is lowest value(Open)
Default: 03
»»If the transceiver has set at higher squelch level, it may fail to
hear the calling. If set at lower squelch level, the radio will be
interfered.
7.27 Scan Dwell Time Setup
Enter No.17 function menu , the LCD displays "SCAN"
This radio has 3 kinds of Scan Dwell Time way.
SE: It stops once scanning a matching signal.
TO: It pauses 5s once scanning a matching signal, then resume scan.
CO: It pauses once scanning a matching signal, signal disappeared
then resume scan.
Default: TO.
7.28 Power On Method Setup
Enter NO.18 function menu, the LCD displays "AOP"
After turn off this function, the transceiver will be power on only by
manually pressing VOL key.
ON: Auto-power on
OFF: Power on by manual
Default: ON.

7.29 Mic Gain Setup

Enter No.19 function menu, the LCD displays "MIG".
1-16: total 16 levels for optional
Default: 6

7.30 Reset Factory Default

Enter No.20 function menu , the LCD displays "RESET".
If your radio seems to be malfunctioning, resetting the microprocessor
may solve the problem.
FACT: All channel, signaling function setup resume factory default.
SETUP: No.10-20 function menu setup resume factory default.
24
8. Programming Software Installing
and Starting (in windows XP system)
1. Double click "XT-818-Setup.exe", then follow the installing
instruction.
2. Click start menu in computer, under "ALL PROGRAMS" menu,
choose and click "USB To Com port" in XT-818 program, install
“USB To Com port” driver by indication.
3. Connect the optional USB Programming cable to USB port in PC
with transceiver.
4. Double click XT-818 shortcut or click XT-818 inprocedure index of
start menu, choose serial com port as indicated then click OK to
start programming software.
5. According to instruction, select correct "COM Port, then click "OK"
to start programming software.
»»Even in same computer, the selective COM Port is different
when USB cable connects with different USB port.

You shall install software before connecting the USB cable line.
Switch on transceiver before writing frequency. You had better not
switch on or off the power supply of transceiver when it is connected
with computer, otherwise, it will make transceiver unable to read
or write frequency. In this case, you have to turn off programming
software, pull out USB cable. then reinsert USB cable and open
software, then rechoose COM Port, it will turn into normal operation.
Therefore, please connect transceiver with computer after switching
on the transceiver. Don't restart transceiver power when it is
connected with computer.

25
9. Maintenance
9.1 Default Setting after Resetting

XT-818

Frequency VHF UHF

VFO Frequency 145.000MHz 435.000MHz
Memory CH 1-199 CH1: 145.000MHz CH1: 435.000MHz
Offset Direction -- --
Offset Frequency 600KHz 5MHz
Channel Step 12.5KHz 25KHz
CTCSS Encode/Decode -- --
CTCSS Frequency 88.5Hz 88.5Hz
DCS Encode/Decode -- --
DCS Code 023N 023N
Power Output HI HI
TOT 3 3
Squelch Level 3 3
Volume 28 28

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9.2 Trouble Shooting
Possible Causes and Potential
NO. Problem
Solutions
+ and - polarities of power connection
Power is on, nothing are reversed. Connect red lead to
1
appears on Display plus terminal and black lead to minus
terminal of DC power supply.
Check and solve problem resulting in
2 Fuse is blown blown fuse and replace fuse with new
fuse.
•Squelch is muted. Decrease squelch
level.
No sound comes from
3 •Tone or CTCSS/DCS squelch is active.
speaker.
Turn CTCSS or DCS squelch
off
Key and Dial do not Key-lock function is activated. Cancel
4
function Key-lock function
Did not list the channel in the scan
5 No Scan
when programmed.
The whole band
The squelch has opened during
6 with noise after
programmed
programmed
a. Check the antenna is well or not, and
Communication check the antenna port whether well
7 range was short, bad connected.
sensitivity b. Antenna connector has debris or
damaged. Whether set Low power
a. Frequency/channel different, pls
Can not talk with other
modify
8 members within the
b. CTCSS/DCS different, pls reset
group
c. Out of the communication range

27
10. Specifications
GENERAL
Frequency Range VHF:136-174MHz; UHF:400-490MHz
Number of Channels 199 channels
Channel Spacing 25KHz(Wide Band); 12.5KHz(Narrow Band)
Phase-locked Step 2.5K,5K,6.25K,10K,12.5K,20K,25K,30K,50K
Operating Voltage 13.8V DC ±15%
Squelch Carrier/CTCSS/DCS
Frequency Stability ±2.5ppm
Operating Temperature -20~+60C
Dimensions
Weight
TRANSMITTER
Wide Band Narrow Band
Sensitivity (12dB SINAD) ≤0.25μV ≤0.35μV
Adjacent Channel
≥60dB ≥60dB
Selectivity
Intermodulation ≥60dB ≥60dB
Spurious response ≥60dB ≥60dB
Audio Response +1~-3dB(0.3~3KHz) +1~-3dB(0.3~3KHz)
Hum & Noise ≥45dB ≥40dB
Audio Distortion ≤5%
Audio Power Output >2W@16R
Transmitting
Wide Band Narrow Band
Power Output 15W / 10W / 5W
Modulation 16KΦF3E 11KΦF3E
Adjacent Channel Power ≥70dB ≥60dB
Hum & Noise ≥40dB ≥36dB
Spurious Emission ≥60dB ≥60dB
Audio Response +1~-3dB(0.3~3KHz) +1~-3dB(0.3~3KHz)
Audio Distortion ≤5%

28
10.1 51 groups CTCSS Tone Frequency(Hz)

No. Freq.(Hz) No. Freq.(Hz) No. Freq. (Hz) No. Freq. (Hz) No. Freq. (Hz)
1 62.5 12 94.8 23 136.5 34 177.3 45 218.1
2 67.0 13 97.4 24 141.3 35 179.9 46 225.7
3 69.3 14 100.0 25 146.2 36 183.5 47 229.1
4 71.9 15 103.5 26 151.4 37 196.2 48 233.6
5 74.4 16 107.2 27 156.7 38 189.9 49 241.8
6 77.0 17 110.9 28 159.8 39 192.8 50 250.3
7 79.7 18 114.8 29 162.2 40 196.6 51 254.1
8 82.5 19 118.8 30 165.5 41 199.5
9 85.4 20 123.0 31 167.9 42 203.5
10 88.5 21 127.3 32 171.3 43 206.5
11 91.5 22 131.8 33 173.8 44 210.7

29
10.2 1024 groups DCS Code

000 001 002 003 004 005 006 007

010 011 012 013 014 015 016 017
020 021 022 023 024 025 026 027
030 031 032 033 034 035 036 037
040 041 042 043 044 045 046 047
050 051 052 053 054 055 056 057
060 061 062 063 064 065 066 067
070 071 072 073 074 075 076 077
100 101 102 103 104 105 106 107
110 111 112 113 114 115 116 117
120 121 122 123 124 125 126 127
130 131 132 133 134 135 136 137
140 141 142 143 144 145 146 147
150 151 152 153 154 155 156 157
160 161 162 163 164 165 166 167
170 171 172 173 174 175 176 177
200 201 202 203 204 205 206 207
210 211 212 213 214 215 216 217
220 221 222 223 224 225 226 227
230 231 232 233 234 235 236 237
240 241 242 243 244 245 246 247
250 251 252 253 254 255 256 257
260 261 262 263 264 265 266 267
270 271 272 273 274 275 276 277
300 301 302 303 304 305 306 307
310 311 312 313 314 315 316 317
320 321 322 323 324 325 326 327
330 331 332 333 334 335 336 337
340 341 342 343 344 345 346 347
350 351 352 353 354 355 356 357
360 361 362 363 364 365 366 367
370 371 372 373 374 375 376 377
400 401 402 403 404 405 406 407

30
 410 411 412 413 414 415 416 417
420 421 422 423 424 425 426 427
430 431 432 433 434 435 436 437
440 441 442 443 444 445 446 447
450 451 452 453 454 455 456 457
460 461 462 463 464 465 466 467
470 471 472 473 474 475 476 477
500 501 502 503 504 505 506 507
510 511 512 513 514 515 516 517
520 521 522 523 524 525 526 527
530 531 532 533 534 535 536 537
540 541 542 543 544 545 546 547
550 551 552 553 554 555 556 557
560 561 562 563 564 565 566 567
570 571 572 573 574 575 576 577
600 601 602 603 604 605 606 607
610 611 612 613 614 615 616 617
620 621 622 623 624 625 626 627
630 631 632 633 634 635 636 637
640 641 642 643 644 645 646 647
650 651 652 653 654 655 656 657
660 661 662 663 664 665 666 667
670 671 672 673 674 675 676 677
700 701 702 703 704 705 706 707
710 711 712 713 714 715 716 717
720 721 722 723 724 725 726 727
730 731 732 733 734 735 736 737
740 741 742 743 744 745 746 747
750 751 752 753 754 755 756 757
760 761 762 763 764 765 766 767
770 771 772 773 774 775 776 777

N is positive code, I is negative code, total: 232 groups.

31