ATR500

P/N 500-(0XX)-(0XX)
P/N 500-(1XX)-(1XX)

VHF Communication Transceiver

Installation and Operation

Dokument-Nr.: 01.1251.010.71e
Revision: 1.05
Date: 30.05.2007

Filser Electronic GmbH • Gewerbestraße 2 • 86875 Waal

phone: +49 8246 96 99-0 • fax: 08246 / 10 49 • web: www.filser.de
ATR500 INSTALLATION AND OPERATION

List of Changes

Revision Date Description of Change

1.00 09.01.2006 initial version
1.01 07.02.2007 new chapter “Customer Support”
1.02 26.02.2007 Troubleshooting, if CON was misadjusted
1.03 21.03.2007 Description of equipment prior to
P/N 500-(1XX)-(1XX)
1.04 02.04.2007 microphones/headphones: parallel connection
1.05 30.05.2007 MIC setting completed

List of Service Bulletins (SB)

Service Bulletins have to be inserted into this manual and to be enlisted

in the following table.

Rev.
SB No No Issue Date Entry Date Name

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ATR500 INSTALLATION AND OPERATION

Contents

1 GENERAL.........................................................................................5
1.1 Symbols ......................................................................................5
1.2 Customer Support.......................................................................5
1.3 Survey of Part Numbers..............................................................6
1.4 System Description .....................................................................6
1.5 Technical Data ............................................................................7
1.6 Telecommunication Data ............................................................8
1.7 Environmental Conditions ...........................................................9
1.8 Scope of Delivery...................................................................... 10
1.9 Accessories .............................................................................. 10
2 INSTALLATION .............................................................................. 11
2.1 Unpacking................................................................................. 11
2.2 Requirements ........................................................................... 11
2.3 Antenna .................................................................................... 12
2.4 On-Board Wiring ....................................................................... 12
2.4.1 Annotations......................................................................... 12
2.4.2 Microphone Connection ...................................................... 13
2.4.3 Headphone Connection ...................................................... 13
2.4.4 Display Illumination ............................................................. 14
2.4.5 Wiring Single-Seater ........................................................... 14
2.4.6 Wiring Double-Seater with Intercom.................................... 15
2.5 Microphone Settings ................................................................. 16
2.6 Installation Check...................................................................... 17
3 DRAWINGS .................................................................................... 18
3.1 Equipment................................................................................. 18
3.2 Equipment Connectors.............................................................. 18
3.3 Panel Cut-out............................................................................ 18
4 OPERATION................................................................................... 19
4.1 ON/OFF .................................................................................... 19
4.2 INIT Menu ................................................................................. 20
4.2.1 MIC-setting ......................................................................... 20
4.2.2 Reset .................................................................................. 21
4.3 Return-Mode (from P/N 500-(1XX)-(1XX)) ................................ 21
4.4 VOL, SQ, VOX, DIM, CON – Basic Settings ............................. 22
4.4.1 General............................................................................... 22
4.4.2 VOL – Volume .................................................................... 22
4.4.3 Squelch............................................................................... 23
4.4.4 VOX – Threshold of Intercom Function ............................... 23
4.4.5 DIM – Background Illumination ........................................... 23

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4.4.6 CON – Contrast .................................................................. 24

4.5 Frequency Setting..................................................................... 25
4.5.1 Direct Input ......................................................................... 25
4.5.2 Select Frequency from Memory Position............................. 25
4.5.3 Save new Frequency .......................................................... 25
4.6 Automatic Frequency Checkup ................................................. 26
4.7 BAT – Low-Battery.................................................................... 26
4.8 Transmit Operation ................................................................... 26
4.9 Receive Operation .................................................................... 26
4.10 Controls .................................................................................... 27

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ATR500 INSTALLATION AND OPERATION

1 GENERAL

1.1 Symbols

Instructions whose non-observance can cause damage to

the device or other parts of the equipment.

Supplementary information.

1.2 Customer Support

For fastest handling of reshipments please use the reshipment form

available from our homepage www.filser.de.

Any suggestions for improvement of our manuals are

welcome. Feel free to contact service@filser.de.

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ATR500 INSTALLATION AND OPERATION

1.3 Survey of Part Numbers

No Part Number Description

1 P/N 500-(0XX)-(0XX) no background illumination
prior to S/N 00301 04
2 P/N 500-(1XX)-(1XX) background illumination adjustable in
from S/N 00301 04 the INIT Menu
3 P/N 500-(1XX)-(1XX) background illumination adjustable in
the normal Menu

1.4 System Description

• VHF Communication Transceiver for installation in aircraft

• operating frequency range from 118.000 to 136.975 MHz
• 25 kHz channel spacing (760 channels)
• panel mounting in a 57 mm cut-out
• memory capacity for 9 user defined frequency entries

To avoid unintentional permanent transmit operation, the

transmitter automatically stops transmission after two
minutes of uninterrupted operation.

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1.5 Technical Data

GENERAL
COMPLIANCE JTSO-2C37e, ED-23B Class 4
JTSO-2C38e, ED-23B Class C
TSO-C37d, RTCA DO-186A Class 4
TSO-C38d, RTCA DO-186A Class C
LBA.O.10.911/113 JTSO
DIMENSIONS Height: 61 mm (2,4 in)
Width: 61 mm (2,4 in)
Depth: 190 mm (7,4 in) behind Panel
WEIGHT 0,49 kg (1,1 lbs)
MOUNTING Panel mounting
OPERATING TEMPERATURE -20 0C .. +55 0C, 30 minutes at +70 0C
RANGE
STORAGE TEMPERATURE RANGE -55 0C .. +85 0C
POWER REQUIREMENTS 14 VDC (9 to 18 VDC)
CURRENT CONSUMPTION Transmitter: 2,5 A
Receiver: 0,1 A (stand-by), max. 0,5 A
FREQUENCY RANGE 118,000 MHz .. 136,975 MHz
FREQUENCY STABILITY ±30 ppm
TRANSMITTER
POWER OUTPUT 6 W (nominal)
4 W (minimal)
MODULATION 70 % modulation capability limited to 98%
distortion < 10 % at 70 % modulation
SIDETONE OUTPUT 100 mW into 500 Ω (headphone)
MICROPHONE Standard microphone (electret) with
100 mVRMS (MIC 1 or MIC 2)
or
dynamic microphone (MIC 1 switchable)
DUTY CYCLE 2 minutes on, 4 minutes off;
auto turn-off after 2 minutes of continuous
transmit operation

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ATR500 INSTALLATION AND OPERATION

RECEIVER
RECEIVER SENSITIVITY 2,5 µV EMF (6 dB S+N/N, m = 30 % /1 kHz)
BANDWDTH -6 dB bandwidth > ±8.0 kHz
SELECTIVITY -40 dB bandwidth < ±17.0 kHz
-60 dB bandwidth < ±22.0 kHz
RECEIVER OUTPUT 4 W into 4 Ω (speaker output)
AGC CHARACTERISTICS AF output deviation < 3 dB
from 10 µV to 10 mV
SQUELCH automatic squelch (adjustable)
SPURIOUS RESPONSES > 80 dB
INTERCOM INPUT The microphone is connected to the
intercom input. 100 mVRMS at the
microphone input produce 100 mW output
power at the headphone output.

1.6 Telecommunication Data

Depending on your national telecommunications legislation, the following

data may be required when applying for the aircraft radio station license:

Manufacturer Filser Electronic GmbH

Type Designation ATR500
EASA Number LBA.O.10.911/113 JTSO
Transmitter Power Output 6W
Frequency 118.000 – 136.975 MHz
Emission Designator 6k00A3E

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1.7 Environmental Conditions

Characteristic DO–160D Section Cat. Condition

Temperature / Altitude 4.0
Low ground survival temperature 4.5.1 – 55°C
Low operating temperature 4.5.1 – 20°C
High ground survival Temperature 4.5.2 C1 + 85°C
High Short-time Operating
4.5.2 + 70°C
Temperature
High Operating Temperature 4.5.3 + 55°C
In –Flight Loss of Cooling 4.5.4 Z No auxiliary cooling required
Altitude 4.6.1 C1 50,000 ft
2°C change rate minimum per
Temperature Variation 5.0 C
minute
Humidity 6.0 A
6 G operational shocks
Shock 7.0 A 20 G crash safety
Test Type R in all 6 directions
Vibration 8.0 S Vibration Curve M
Explosion Proofness 9.0 X No test required
Water Proofness 10.0 X No test required
Fluids Susceptibilities 11.0 X No test required
Sand and Dust 12.0 X No test required
Fungus Resistance 13.0 X No test required
Salt Spray 14.0 X No test required
Magnetic Effect 15.0 Z < 0.3 m Compass Safe Distance
Power Input (DC) 16.0 B
Voltage Spike Conducted 17.0 A
Audio Frequency Conducted
18.0 A
Susceptibility
Induced Signal Susceptibility 19.0 A
Radio Frequency Susceptibility 20.0 TT
Emission of RF Energy 21.0 M
Lightning Induced Transient B3F
22.0
Susceptibility 3
Lightning Direct Effects 23.0 X No test required
Icing 24.0 X No test required
Electrostatic Discharge (ESD) 25.0 A

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1.8 Scope of Delivery

order no. description
ATR500 ATR500, 760 channel communication transceiver
01.1251.010.71e manual ATR500 „Installation and Operation“
EASA Form 1

1.9 Accessories

Maintenance Manual
Bestellnummer description
01.125.010.13e Maintenance Manual

Cable Looms
order no. description
BSKS500A cable loom with free ends for gliders
cable loom with free ends for airplanes
BSKS500E
incl. connector set
cable loom with free ends for airplanes (with light).
BSKS500F
without connector set
BSKS500U cable loom for ATR500 with 2 headset connectors and 1 PTT
BSKS500V cable loom for ATR500 with 2 headset connectors and 2 PTT
BSKSZUB connector set
ZSHM10 swan neck microphone

Antennas for Planes

order. no. description
SP100 folded-top antenna, alu, with 10 m antenna cable
SP2000 folded-top antenna, cable, BNC-jack
SP200010 antenna cable for SP2000, 10 m

Mobile Station
order. no. description
ZGS6 carrying bag (leather) incl. battery, antenna and mike
AL2000 charger
32023100 antenna
ZDHMGS6 dynamic hand-microphone
PNEGAK01 replacement battery 12V/6,5Ah for GS6/GS7

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ATR500 INSTALLATION AND OPERATION

2 INSTALLATION

2.1 Unpacking

• Carefully unpack the equipment.

• Damages due to transport must be reported to the shipping
company.
• Save the shipping container and all packing materials to
substantiate your claim.

For storage or reshipment the original packaging should be

used.

2.2 Requirements

• In arrangement with an avionics shop, location and kind of the

installation are specified. An avionics shop can install all cables.
Refer to 1.9 Accessories for cable looms.
• The equipment is front-laterally fixed in the instrument panel in a
57 mm cut-out using four M4 screws (included in delivery).
• Leave sufficient space for the installation of cables and connectors.
• Avoid sharp bends and the routing of cables close to control
cables.
• Avoid installation close to heat sources.
• Care for adequate convection cooling.

Note 2.4.2 Microphone Connection BEFORE mounting!

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2.3 Antenna

Use an omni-directional vertical polarized VHF COM antenna with a

50 Ohm impedance. Wideband comm antennas provide efficient
operation over the VHF communications band.

Installation recommendations:

• consider the manufacturer’s recommendations

• Mount the antenna in vertical position so on or under the belly that
it is as far distant as possible from all protruding parts (propeller,
chassis, vertical stabilizer).
• To avoid any mutual interference of the radios, the antenna
isolation between a voice transmission and a navigation antenna
as well as between double COM antennas should be as high as
possible. A separation of 2 meters usually is sufficient.
• The metallic contact between airplane surface and antenna must
be very good. On non-metallic airplanes a metal foil (min. 80 cm x
80 cm) shall be used as electrical counterweight on the inside of
the belly.
• For glider installation the internal antenna installed by the
manufacturer should be used.

2.4 On-Board Wiring

2.4.1 Annotations

• Keep wiring as short as possible.

• Avoid cable running near strong high frequency sources such as
ignition coil, generator or battery charger.
• Refer to 1.9 Accessories for cable looms.
• All cables can be installed by an aeronautical-engineering
enterprise.
• The cables must be approved for airplane installation.
• conductor cross-section:
o power, GND: AWG18 (0.96 mm²)
o signals: AWG22 (0.38 mm²)
• external slow-blow fuse (3 A) required.

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2.4.2 Microphone Connection

Microphone inputs:
MIC 1: switchable („Mic Switch“on the right side of the equipment) for
• dynamic microphones (factory setting)
• standard (electret) microphones
MIC 2: only for standard (electret) microphones

The input for standard (electret) microphones is appropriate for input

voltages of 50 mVpp to 2 Vpp. This input has a bias voltage of 8 V at 330
ohms. Sensitivity is adjustable in the init menu with MIC.
The input for dynamic microphones is appropriate for input voltages of
5 mVpp to 10 mVpp. This input has no bias.
Use microphones of the same type, since the settings described in the
following are always concerning both microphone inputs.

Check setting of the MIC switch on the right side of the

radio BEFORE mounting!
(Factory setting: dynamic microphone)
Two microphones may be connected parallel per
microphone input.

2.4.3 Headphone Connection

Headphones may be connected parallel as long as the total impedance

doesn’t fall below 8 Ω.

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2.4.4 Display Illumination

From No 2 of 1.3 Survey of Part Numbers!

„DISPLAY_LIGHTING“ (Pin 4) must be connected according to the
desired function:

• GND illumination off

• +UB illumination on
• dimmer illumination external adjustable
• switch illumination external switchable

If pin 4 is connected to an external voltage supply, illumination can be

adjusted by the DIM function (refer to 4.4.5, page 23).

2.4.5 Wiring Single-Seater

Cable loom BSKS500A

TXPC: TX to PC
RXPC: RX from PC

DISPLAY_LIGHTING: Refer to 2.4.4 for connection.

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2.4.6 Wiring Double-Seater with Intercom

Cable Looms:
BSKS500U: 1 PTT button; BSKS500V 2 PTT buttons.

TXPC: TX to PC
RXPC: RX from PC

DISPLAY_LIGHTING: Refer to 2.4.4 for connection.

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2.5 Microphone Settings

Settings of MIC- und VOX-values are essential for intercom operation.

Using VOX the threshold level is adjusted so that usual flight noise is not
transmitted to the headphones, but only an additional signal caused by
speaking will start intercom operation.
With very strong background noise or uncompensated microphones VOX
can be deactivated by setting VOX01.
In this case intercom is activated using a press-to-talk key (PTT), which
connects pin 12 (intercom) of the equipment connector to GND. If
required, e. g. in a tandem cockpit, use two parallel connected PTT keys.
For operating in VOX mode pin 12 has to be connected permanently to
GND.
Transmission merely operates when PTT is pressed.
The suppression of background noise is only possible using differential
microphones, as they are usual with modern headsets. Normal electret
microphones are not suitable.

For setting refer to 4.2.1 MIC-setting.

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2.6 Installation Check

When installation is completed all steering and control functions of the

aircraft are to be examined, in order to exclude disturbances by the
wiring.
Subsequently, check antenna matching. Insert a standing wave meter,
respectively a direction-sensitive RF power meter into the antenna line.
Determine standing wave ratio (SWR) over the entire operating
frequency range. The SWR shall not exceed 3:1 (the reflected power
shall not exceed 25% of the forward power). If this value is exceeded, a
mismatching is present, which can be caused e. g. by incorrect or
insufficient electrical counterweight, bad contacting or incorrect radiator
length.

With COM antennas attached on the fuselage lower side

this measurement must be accomplished during flight, in
order to avoid faulty measurements.

After the antenna measurement a communication test with an

aeronautical station shall be accomplished.

Furthermore a test flight is recommended, in order to guarantee the

proper in-flight operation of the radio:
• In a flight altitude of at least 1500 ft contact a ground station in a
distance of at least 100 km (60 nautical miles).
• Pay attention to unusual electrical interference.
• If possible, perform the radio test on frequencies within the upper
and lower VHF communication frequency range.

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3 DRAWINGS
3.1 Equipment 3.2 Equipment Connectors

Ca. 70 mm

3.3 Panel Cut-out

23 mm
163 mm

18 mm

Not full scale!

61 mm

61 mm

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4 OPERATION

For figure of controls refer to page 27.

4.1 ON/OFF

• power on: press about 0,5 s

• power off: press about 3 s

Display after power on

ATR500 device type

V2.5 software release

Afterwards one of the following viewings appears, depending on the

position of the MEM switch:

118.00 active frequency

>118.00 stand-by frequency

or

118.00 active frequency

M3 memory position

At power on the last settings are used.

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ATR500 INSTALLATION AND OPERATION

4.2 INIT Menu

The INIT Menu contains

• MIC Setting (microphone level)
• reset to factory settings
• contrast (previous to P/N 500-(1XX)-(1XX), refer to 4.4.6)

Call INIT Menu: keep pressed at power on

Key Assignment:
EXIT: VOL/SQ
MIC: STORE
INIT:
CON:

4.2.1 MIC-setting

The MIC level simultaneously effects MIC 1 and MIC 2. Therefore two
equivalent electret microphones must be used to ensure successful
intercom operation.
• For setting MIC, VOX previously must be set to 5 (refer to 4.4.4).
• select MIC: press STORE

EXIT
MIC:05 MIC:nn, nn = 01 .. 32

• set level: turn VOL

lowest sensitivity: MIC01
usually setting for avionic headsets: 01 .. 05
The microphone level can be adjusted using headphones: With
engine running talk loud and clearly and vary MIC until VOX
switches on and off satisfactorily.
• exit: press VOL/SQ

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4.2.2 Reset

EXIT MIC
INIT

• Select INIT: press UP/DOWN

All values will be set to factory defaults:

MEM1 118.00 VOL 03

MEM2 127.00 SQ 08
MEM3 136.97 VOX 05
MEM4 127.50 MIC 05
MEM5 130.47 DIM 10
MEM6-9 118.00 CON 05

4.3 Return-Mode (from P/N 500-(1XX)-(1XX))

The return mode determines, if the display automatically returns to

frequency view after changes by the user (VOL, VOX, etc.).

• Call menu: keep pressed during power on

EXIT
RETURN (Y) RETURN: Y/N

• select (Yes/No): VOL

yes: switch to frequency view after 5 s (default)
no: remain in actual setting item
• exit: VOL/SQ

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4.4 VOL, SQ, VOX, DIM, CON – Basic Settings

4.4.1 General

Select one of the following setting modes: press VOL/SQ (repeatedly).

• VOL volume
• SQ squelch
• VOX threshold of intercom function
• DIM display background illumination
• CON display contrast
• frequency view

Use the rotary knob to change values.

Return to frequency view:

press or or wait for auto-return (after 5 s without manipulation).
(Auto-return can be switched off as described in chapter 4.3.

If contrast was misadjusted and the display is not readable:

• Switch power off and on again.
• Wait for 5 s, then press VOL/SQ 5 times.
• Turn VOL to set contrast.

4.4.2 VOL – Volume

127.50 VOL:nn, nn = 01 ... 16

VOL:13 (prior to P/N 500-(1XX)-(1XX): nn = 01 .. 32)

VOL only affects the received signal, not the intercom level,
which is set ex-factory.

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4.4.3 Squelch

127.50
SQ :03 SQ :nn, nn = 01 .. 10

Usual setting is 03 .. 05. Superior values can cause

unwanted suppression of low signals.
Squelch does not affect the intercom function.

4.4.4 VOX – Threshold of Intercom Function

With VOX the volume threshold is set to avoid transmission of normal

noise in the cockpit to the headphones.
Only an additional voice signal activates intercom operation.

127.50
VOX:05 VOX:nn, nn = 01 .. 10

4.4.5 DIM – Background Illumination

precondition: corresponding wiring (refer to 2.4.4).

ab P/N 500-(1XX)-(1XX)

127.50
DIM:10 DIM:nn, nn = 01 .. 10

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P/N 500-(0XX)-(0XX) from S/N 00301 04

• call LIGHT menu: keep pressed during power on.
EXIT
LIGHT

• press

EXIT
LIGHT:05 LIGHT:nn, nn = 01 .. 32

• exit: VOL/SQ

4.4.6 CON – Contrast

from P/N 500-(1XX)-(1XX)

127.50
CON:10 CON:nn, nn = 01 .. 10

P/N 500-(0XX)-(0XX)
• call INIT-Menu: keep pressed during power on.
• select „CON“: press

EXIT
CON:16 CON:nn, nn = 01 .. 32

• exit: VOL/SQ

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4.5 Frequency Setting

4.5.1 Direct Input

• turn MEM to position „SET“

127.00 active frequency

>136.95 stand-by frequency

• select setting of MHz or kHz using “ “

“>”/“<” marks the selected part of the frequency value (MHz/kHz)
• turn VOL to change values
• press (UP/DOWN) to activate stand-by frequency
(swap previously active and stand-by frequency)

4.5.2 Select Frequency from Memory Position

• Turn „MEM“ to select position (M1...M9)

The stored frequency is displayed and set as active frequency.

136.95 stored frequency

M2 selected memory position

4.5.3 Save new Frequency

• Set frequency (manually) (refer to 4.5.1).

• Select memory position (M1 .. M9).
Position and according frequency are displayed and active, the
previously active frequency is stored in the background.
• Press STORE, to save the memorized value.
(The present value will be overwritten.)

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4.6 Automatic Frequency Checkup

If „–“ is displayed behind the frequency value, the equipment is not able
to set the frequency. Transmit/receive operation stops.
In this case the ATR500 and has to be sent to the manufacturer.

If „–“ appears for less than 1 second, an extreme radio

interference could be the reason. This is no malfunction of
the device.

4.7 BAT – Low-Battery

If battery voltage drops below 10,5 V, a blinking „B“ is displayed.

4.8 Transmit Operation

Pushing PTT starts transmission on the selected frequency shown in the

upper line. This operation is indicated by “T”.

136T95 „T“ indicates correct operating of the transmitter.

M2

To avoid unintended transmission the transmitter stops after two minutes

and the display changes from “T” to “E”.
To start transmission again, release PTT and push again.

4.9 Receive Operation

136R95 While receiving (squelch is open) “R” is shown.

M2

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4.10 Controls

1: MEM/SET select frequency from memory

position (M1 .. M9)
direct frequency input (SET)
2: rotary knob change values
3: VOL/SQ select VOL, SQ, VOX, DIM,
CON
4: STORE save frequency
5: ON/OFF on/off (press for 0,5 bzw. 3 s)
6: select MHz/kHz setting
start INIT mode
7: swap active/stand-by
(UP/DOWN) frequency

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