F.u.n.k.e. FSG 90 Guide

FSG 90
FSG 90-H1
Dual Mode VHF/AM
Airband-Transceiver
118.000 … 136.975 MHz
6 Watt / 10 Watt
8.33kHz / 25 kHz channel spacing
ETSO: EASA.21O.1305 Rev.A
FAA: TSO C37d / TSO C38d
BAF: D-0036/2014 (FSG90)
D-0037/2014 (FSG90-H1)
FCC ID: BVYFSG90
Installation & Operation
applies for FSG 90 (6 W) article no. F10185
applies for FSG 90-H1 (10 W) article no. F10302
Before installing and operating the transceiver, please read
this manual thoroughly!
Please observe the Safety Information!
Keep for further use!
Document Name: IM 031.00
Document No.: FAV_D10024
Revision: 3.00
Date of Issue December 2014
f.u.n.k.e. AVIONICS GmbH
Heinz-Strachowitz-Str. 4 86807 Buchloe Germany
Telephone [phone] / 80066-0 Fax [phone] / 8066-99
e-mail: [email protected]
Internet: www.funkeavionics.de
f.u.n.k.e. AVIONICS GmbH ist zertifiziert nach DIN EN ISO 9001:2008. f.u.n.k.e. AVIONICS GmbH ist anerkannter Luftfahrt-Herstellbetrieb
DE.21G.0078, anerkannter Instandhaltungsbetrieb DE.145.0436 undEntwicklungsbetrieb APOA-013

FSG 90 System
Airband Transceiver
ii FAV_D10024 December 2014

FSG 90 System
Airband Transceiver
December 2014 FAV_D10024 iii
Copyright –Service Information
The details and data in this operator's manual correspond to the respective
state of technology on the day of printing. We reserve our right to change
without prior notice due to new technological design or corresponding new
production technology.
f.u.n.k.e. AVIONICS GmbH takes no guarantee for these documents with
respect to application and interpretation.
Copyright 2014
f.u.n.k.e. AVIONICS
GmbH
All rights reserved. This document contains proprietary information and such
information may not be disclosed to others for any purpose nor used for
manufacturing purposes without prior written permission of the manufacturer
f.u.n.k.e. AVIONICS GmbH, 86807 Buchloe, Germany.
In this document no mention is made of patents, trademark rights, or other
proprietary rights which may attach to certain words or entries. The absence
of such mention, however, in no way implies that the words or entries in
question are exempt from such rights.
Service Information
Should any unusual problem arise or further information be desired, please
contact the f.u.n.k.e. AVIONICS GmbH, Heinz-Strachowitz-Str. 4, 86807
Buchloe, Germany
The information in this Operator's Manual does not profess to include all the
details of design, production, or variation of the equipment, or to cover all the
possible contingencies which may arise during operation or maintenance.
We welcome your comments concerning this Manual. Although every effort
has been made to keep it free of errors, some may occur. When reporting a
specific problem, please describe it briefly and include the Operator's
Manual article number, paragraph or figure number, and the page number.
Send your comments toPublications Department
f.u.n.k.e. AVIONICS GmbH
Heinz-Strachowitz-Str. 4
86807 Buchloe
Germany
or via e-mail to: [e-mail]
Subject to technical changes without prior notice Printed in Germany

FSG 90 System
Table of Content
iv FAV_D10024 December 2014
Table of Content
Page
COPYRIGHT –SERVICE INFORMATION III
TABLE OF CONTENT IV
ABBREVIATIONS 1
1 SAFETY INFORMATION 2
2 GENERAL DESCRIPTION 4
2.1 INTRODUCTION 4
2.2 MODELS OF THE FSG 90 SYSTEM 4
2.3 APPLICATION 4
2.4 BRIEF DESCRIPTION 5
2.5 SYSTEM AND TYPE APPROVAL INFORMATION 8
2.6 OPERATING LICENSE 9
2.7 EQUIPMENT SUPPLIED 9
2.8 OPTIONAL ACCESSORIES 10
2.9 EQUIPMENT REQUIRED BUT NOT SUPPLIED 11
2.10 INFORMATION ON EQUIPMENT RELIABILITY 11
2.11 MICROPHONE HINTS 12
3 INSTALLATION 14
3.1 GENERAL 14
3.2 UNPACKING AND INSPECTING EQUIPMENT 14
3.3 PRE-INSTALLATION TEST 14
3.4 PARTICULAR REMARKS TO FSG 90(X) TRANSMITTER MODULATION 15
3.5 MECHANICAL INSTALLATION 18
3.5.1 Transceiver installation 18
3.5.2 Compass deviation 18
3.5.3 Antenna installation 20
3.6 AIRBORNE WIRING 22
3.6.1 General recommendations 22
3.6.2 Microphone Connection 27
3.6.3 Intercom (IC) 28
3.6.4 Loudspeaker / Headset interconnection 28
3.6.5 AF External Operation 29
3.6.6 Lighting the Frequency Display 29
3.6.7 Connection to a 28 Vdc airborne system 29
3.7 POST-INSTALLATION CHECK 30
3.7.1 Testing on the Ground with Engine Off 30
3.7.2 Ground checks with engine running 30
4 FUNCTIONAL DESCRIPTION 32
4.1INTRODUCTION 32
4.2 OPERATOR'S CONTROLS 32
4.3 FREQUENCY DISPLAY,5-DIGIT OR 6-DIGIT LIQUID CRYSTAL DISPLAY (LCD), TWO LINES,CAN BE BACK-LIT. 35
4.4 CONNECTORS AT THE REAR SIDE 36

FSG 90 System
Table of Content
December 2014 FAV_D10024 v
5 SET-UP PROCEDURE 38
5.1 CALLING SET-UP WITHOUT PASSWORD 39
5.2 CALLING SET-UP WITH PASSWORD 40
5.3 INTERRUPT THE SET-UP PROCEDURE 40
5.4 SET-UP PROCEDURE 41
5.4.1 Adjusting the automatic squelch threshold 41
5.4.2 Adjusting the microphone sensitivity (Dynamic or amplified/carbon microphones) 41
5.4.3 Adjusting the Intercom volume 42
5.4.4 Adjusting the Sidetone volume 43
5.4.5 Adjusting the headset volume 43
5.4.6 Selecting '25 kHz only' or combined 8.33/25 kHz channel spacing 44
5.4.7 Deleting occupied channel memories 44
5.4.8 Selecting AF EXTERNAL via A/C speaker (ON/OFF) 45
5.4.9 Selecting 'CHANNEL MODE ONLY' or 'NO RESTRICTION' 45
5.4.10 Selecting 'TRANSMITTER BLOCKING' during receive (ON/OFF) 46
5.4.11 Service (ON/OFF) 46
5.4.12 Optional module (ON/OFF) 46
5.4.13 Entering a password 47
5.4.14 Reset 48
6 OPERATING INSTRUCTION 50
6.1 INTRODUCTION 50
6.2 TURNING ON -SELECTING FREQUENCY/CHANNEL NAME -VOLUME 50
6.3 RECEIVE (LISTEN)OPERATION 52
6.4 TRANSMIT (TALK)OPERATION 53
6.5 STORING A NEW FREQUENCY/CHANNEL NAME 54
6.6 RECALL OF STORED FREQUENCY/CHANNEL NAME 54
6.7 SQUELCH (SQ) OPERATION 54
6.8 INTERCOM 55
6.9 AF EXTERNAL 55
6.10 LIGHTING 55
6.11 TURNING OFF 56
6.12 CHECKING THE A/C ON-BOARD SUPPLY 56
6.13 OPERATING TIMES OF AN FSG 90 (6 WATT VERSION)SUPPLIED FROM A 12 V BATTERY ONLY 57
6.14 EMERGENCY OPERATION 57
APPENDIX A, TECHNICAL SUMMARY 58
A.1 GENERAL 58
A.2 DIMENSIONS,WEIGHT,FUSES 59
A.3 APPROVALS 59
A.4 RECEIVER CHARACTERISTICS 60
A.5 TRANSMITTER CHARACTERISTICS 62
APPENDIX B, ENVIRONMENTAL PERFORMANCE CLASSIFICATION 64
APPENDIX C, ICAO FREQUENCY-CHANNEL PAIRING 66
APPENDIX D, CERTIFICATES 68

FSG 90 System
Table of Content
vi FAV_D10024 December 2014
Manual Revision History
Manual IM 031.00
Revision 3.00
Retain this list in the front of the Installation & Operation
Manual as a RECORD OF REVISIONS.
Revision
Dittel
Reason for change
Date
?
Last Dittel-IM-Revision IM031.00 D10024 from April 2013
! No Revision History inside !
?
Revision
FAV
Reason for change
Date
1.00
Initial Release after change to f.u.n.k.e. AVIONICS GmbH; 86807 Buchloe
–Germany
(Original Dittel-IM-Revision IM031.00 D10014 from April 2013)
17.03.2014
2.00
FCC document added
25.06.2014
3.00
Changes according to requirements by
Bundesaufsichtsamt für Flugsicherung (BAF)
19.12.2014

FSG 90 System
1 Safety Information
December 2014 FAV_D10024 1
Abbreviations
A/C
Aircraft
NM
Nautical miles
A/N
Article Number
(f.u.n.k.e. AVIONICS)
nW
Nanowatt (10-9)
AGC
Automatic Gain Control
PEP
Peak Envelope Power
Ah
Ampere hour
PLL
Phase-Locked Loop
AM
Amplitude Modulation
ppm
parts per million
ANT
Antenna
PTT
Push-To-Talk
Ass'y
Assembly
pW
Picowatt (10-12)
AWG
American Wire Gauge
PWR
Power
ccw
Counterclockwise (turn left ↺)
RF
Radio Frequency
CH
Channel
rms
Effective value (root mean square)
CTS
Ready-to-Transmit
RTS
Invitation to send
cw
Clockwise (turn right ↻)
RX
Receive
dB
Decibel
RxD
Receive data
dia.
Diameter
S+N/N
Signal-to-Noise Ratio
EMF
Electromotive Force (voltage of an open
circuit)
SINAD
Ratio:
Signal noise distortion
noise distortion
 

F/CH
Frequency/Channel
SPKR
Loudspeaker
FL
Flight Level
SQ
Squelch
g
Acceleration due to gravity
STBY
Standby
GND
Ground
STO
Store
HI
High Power
SWR
Standing-Wave Ratio
Hz
Hertz
TOT
Time out timer
ICAO
International Civil Aviation Organization
TX
Transmit
IF
Intermediate Frequency
TxD
Transmit data
kHz
Kilohertz
VCO
Voltage-Controlled Oscillator
LCD
Liquid Crystal Display
Vdc
Volts, direct current
LED
Light Emitting Diode
VHF
Very-High Frequency
LO
Low Power
VOL
Volume
LOS
Line-Of-Sight
VSWR
Voltage Standing-Wave Ratio
m
Modulation
W
Watt
mA
Milliamperes
Ω
Ohm
MD
Mode
°C
Degrees Centigrade
MHz
Megahertz
°F
Degrees Fahrenheit
MIC
Microphone
mW
Milliwatt

FSG 90 System
1 Safety Information
2 FAV_D10024 December 2014
1 Safety Information
Every radio, when transmitting, radiates energy into the atmosphere
that may, under certain conditions, cause the generation of sparks. All
users of our radios should be aware of the following warning:
Do not operate this radio in an explosive atmosphere (petroleum
fuels, solvents, dust, etc.)!
During normal use, the radio will subject you to radio energy
substantially below the level where any kind of harm is reported.
TO ENSURE
PERSONAL SAFETY,
please observe the following simple rules:
DO NOT transmit when the antenna is very close to, or touching,
exposed parts of the body, especially the face and eyes.
DO NOT transmit on a busy channel.
DO NOT press the transmit (PTT) key when not actually desiring
to transmit.
DO NOT transmit in closed aircraft or vehicles with the antenna
inside the cabin. This may cause malfunction of the avionics or
trigger the airbag! Always operate the radio FSG 90(X) with a
suitable outside / external antenna! Assure appropriate lightning
protection where elevated outdoor antennas are used.
DO NOT operate the radio whilst driving. Notice that the use of a
hand held microphone while driving could constitute an offence
under the Road Traffic Regulations in certain countries.
DO NOT allow children to play with any radio equipment
containing a transmitter.
DO NOT call radio’s SET-UP in flight or whilst driving a vehicle.
Transmit and receive are partially disabled!
After each SET-UP check all settings of the radio and cockpit
instruments for correct function before the next flight or application!
Always turn OFF the radio first (to turn OFF the radio rotate the
ON/OFF-VOL knob fully counterclockwise to the dot position).
- before switching on or switching off the power source
- before installing the unit into vehicles, aircraft or carrier cases or
when removing from it!
- before starting an engine or vehicle!
When operating the FSG 90(X) on a 24/28 Vdc source use a
suitable Voltage Converter 24 Vdc/12 Vdc of at least 5 Amps!
Use the FSG 90(X) exclusively for communication on the airband
frequencies.

FSG 90 System
1 Safety Information
December 2014 FAV_D10024 3
Unauthorized modifications and changes of the system are
forbidden.
When replacing defective parts use only original spare parts or
standard parts recommended by the manufacturer!
In aircraft or vehicles, use a suitable noise cancelling microphone
or headset for aircraft radios.
Always carry a backup microphone during any flight. Even new
microphones can fail.
Volume is very important. Increasing speaking levels while the lips
are facing the microphone, but not straining or pushing to yelling
levels will increase clarity.
Prior to any flight, verify proper FSG 90(X) functions by means of a
short communications test. It has to be taken into account that with
a faulty antenna or cable this COM test may absolutely turn out
positive at the airfield or in short distance to the ground station.
However, at a distance of 2 to 6 miles faulty antenna and/or cables
will cause communication breakdown!
Push-to-Talk keys may stick occasionally. Therefore, observe
while transmitting the transmit (TX) symbol at the FSG 90(X)
display. This TX symbol must disappear when releasing the PTT
key. After 2 minutes continuous TX the built-in transmit time out
timer disables the transmitter in order to avoid continuous channel
blocking. Then, the whole display warns by continuous flashing.
Refer to appropriate hints in this manual.
Replace blown fuse only against correct type with specified
nominal value. Investigate the cause.
In this manual the following symbols are used:
DANGER!
describes an immediate threatening danger! Failing to observe the
note may cause death or heaviest injuries.
CAUTION!
describes a special note for operation. Failing to observe the note
may cause damage of the transceiver and/or stored data may be
deleted!
IMPORTANT!
describes explanations and other useful hints. Failing to observe
the note may cause degraded performance and/or unsatisfying
operation!

FSG 90 System
2 General Description
4 FAV_D10024 December 2014
2 General Description
2.1 Introduction
This installation and operating manual IM 031.00 contains instructions and descriptions
for application, installation, pre-setting operation and testing, as well as interconnecting
diagrams of the multi-use FSG 90 VHF/AM Transceiver System of f.u.n.k.e. AVIONICS
GmbH, 86807 Buchloe, Germany.
2.2 Models of the FSG 90 System
This manual refers to 2 out of 8 models available up to now.
A/N F10185, VHF/AM Dual Mode Airband Transceiver FSG 90
Frequency range: 118.000 to 136.975 MHz, channel spacing 8.33 kHz/25 kHz, results in
2,278 channels, and 118.000 to 136.975 MHz, channel spacing 25 kHz, results in 760
channels. Ninety-nine (99) channel memories for combined 8.33/25 kHz mode,
additional 99 memory channels for '25 kHz only' mode, 6 W RF carrier output power,
10 - 16.5 Vdc supply. The radio will fit a standard 58 mm dia. / 2¼" dia. instrument panel.
IDENT.: MODEL 90-25/8.33 (ED-23B CLASS C / CLASS E RECEIVER, CLASS 4 /
CLASS 6 TRANSMITTER).
A/N F10302, VHF/AM Dual Mode Airband Transceiver FSG 90-H1
Frequency range: 118.000 to 136.975 MHz, channel spacing 8.33 kHz/25 kHz, results in
2,278 channels, and 118.000 to 136.975 MHz, channel spacing 25 kHz, results in 760
channels. 99 channel memories for combined 8.33/25 kHz mode, additional 99 memory
channels for '25 kHz only' mode, 10 W RF carrier output power, 10 - 16.5 Vdc supply.
The radio will fit a standard 58 mm dia. / 2¼" dia. instrument panel.
IDENT.: MODEL 90-25/8.33-H1 (ED-23B CLASS C / CLASS E RECEIVER, CLASS 4 /
CLASS 6 TRANSMITTER).
2.3 Application
The equipment is well suited for operation in powered aircraft and helicopter with
reciprocating turboprop and turbojet engine.
Ultra low power consumption in conjunction with extremely wide DC supply voltage
range, small dimensions and wide scope of accessories allow universal airborne
applications in any powered aircraft, motor glider and Ultralight, and in glider and
balloon, for primary or (also battery supplied) backup operation.
Universal use also in ground vehicle, as well as for compact portable cases and for
desktop or rack mounted, local or remote controlled, fixed base primary, or (also battery
supplied) backup operations, are further applications. Please always ensure suitable
antenna solutions!
Retrofit installation is achieved against former panel mounted slide-in VHF COM
transceivers FSG 40A, FSG 40S, FSG 50, FSG 60M, and panel mounted FSG 70,
FSG 71M using adapters.

FSG 90 System
2 General Description
December 2014 FAV_D10024 5
2.4 Brief Description
The two radios out of the FSG 90 System are miniaturized, lightweight, panel mounted
single block VHF/AM transceivers operating in the airband frequency range
118.000 MHz ... 136.975 MHz. They provide either 2,278 channels with 8.33 kHz/25 kHz
channel spacing, plus 760 channels with '25 kHz only' channel spacing, covering a
standard communications distance of 100 NM (nautical miles) at FL 70.
Case dimensions of all models will fit into a standard 2¼ in. / 58 mm diameter opening of
the instrument panel or console (behind panel installation), using four (4) screws. Depth
including wiring is 230 mm.
All control and display elements are located on the front panel. Connections to the
electrical environment are made through a 25-pole D-SUB connector and a BNC female
connector at the rear panel of the units.
The ICAO channel name (8.33 kHz/25 kHz spacing) and operating frequency (25 kHz
spacing), supply indicator, transmit indicator, channel memory number and SET-UP
information are all indicated at a two-line Liquid Crystal Display (LCD, can be back-lit).
Three operating/display modes are user selectable:
Use/STBY Mode: Active channel name or frequency, selectable standby channel
name / frequency
Channel Mode: Active channel name or frequency, associated pre-set channel
memory number (1 … 99)
Direct Tune Mode: Active channel name or frequency only.
With the Dual Mode models FSG 90(X) up to 99 channel memories in 8.33 kHz / 25 kHz
CH spacing (6-digit display), and another set of up to 99 channels in the '25 kHz only'
CH spacing (5-digit display) can be pre-set. After change to the other operating mode
(from 8.33/25 kHz to 25 kHz only, or from 25 kHz to 8.33/25 kHz), each stored set of up
to 99 channel memories remains available.
Preset channel memories remain available also after manual or automatic power-off.
The non-volatile channel memories of all FSG 90(X) can easily reprogrammed also
during flight or ground operation.
Programming can be done in the actual mode. Deleting channel memories is possible in
each mode (only during SET-UP mode).
For ground applications, limitation to use pre-set channel(s) only can be determined in
(password protected) SET-UP.
Channel name / frequency, or pre-set channel memories are selected with the dual
function F/CH switch.
Both Transmit and Receive use the same digital frequency synthesizer and one
temperature calibrated reference crystal (accuracy 1 ppm in the temperature range from
0°C to +40°C/32°F to 104°F).
The dual superhet receiver offers very high immunity against in-band and out-of-band
interference and intermodulation (Annex 10 FM immunity).

FSG 90 System
2 General Description
6 FAV_D10024 December 2014
The automatic AM/FM Squelch (threshold adjustable in 4 levels, SET-UP) and the
normally active transmitter blocking during Receive are disabled by pushing the SQ
button, and enabled when the SQ button is pushed again.
An audio low pass filter for areas using Climax operation in 25 kHz spacing is
incorporated.
Separate Audio amplifiers power the speaker (4 Watts / 4 Ohms or 8 Watts / 2 Ohms),
and the headphones (100 mW / 600 Ohms).
The solid-state transmitter is wideband tuned from 118 to 137 MHz and delivers at least
an RF carrier power of 6 Watts or 10 Watts for the FSG 90-H1 model.
Transmit frequency / channel name is tuned simultaneously with Receive frequency /
channel name (Simplex operation).
A keyed transmitter is indicated by a transmit symbol at the LC display.
Two independent microphone inputs (separate pins) allow universal accessory
operation:
For powered aircraft use Standard Carbon, amplified Dynamic or Electret
microphones,
For gliders, portable, vehicle mobile and fixed base operation use non-amplified
Dynamic microphones.
The microphone inputs may also be continuously activated. This allows in Receive
continuous intercommunication (no additional accessories needed) between pilot and
crew (intercom wiring harness), using headsets.
A separate AF input allows interconnection of external audio source(s) especially in
aircraft using other COM, VOR/LOC, DME, MKR and/or electric variometers. This allows
signal monitoring during Receive by speaker and/or headphone.
30 mA current consumption saving can be achieved in standby mode (Squelch ON),
when the FSG 90(X) is used e.g. in portable cases or installations, where no external
audio is required for speaker output. However listening through the headphone remains
possible. This external AF OFF function may be selected in SET-UP. This reduces the
standby current consumption to only 85 mA and will extend battery supplied operating
time significantly.
The transceiver can be supplied either directly from a 12 - 14 Vdc A/C bus, or through a
suitable DC regulator from 28 Vdc-buses.
In aircraft (or portable cases) without on-board electric power generation system (UL,
Glider etc.), operation from a 12 Vdc battery (min. 6 Ah) is suitable.
The DC supply voltage is monitored automatically. When supply drops below 11 Vdc, the
Supply Indicator at the LC display starts blinking as a low supply warning.
Below 8.5 to 9.5 Vdc, the FSG 90(X) turns OFF itself automatically, and will resume
operation with supply above 9.5 to 10 Vdc. The last used settings remain active.
A voice processor is incorporated to achieve identical acoustic voice quality during
Transmit and Receive, as well as Audio Levelling in Receive, and in addition prevents
overmodulation. Usual testing employs sinusoidal tone signals only; this feature
especially considers the specific characteristic of the voice. It ensures also VERY HIGH

FSG 90 System
2 General Description
December 2014 FAV_D10024 7
AVERAGE DEPTH OF MODULATION of some 80% AM, causing transmission signals
sounding normal and very strong.
The radios are equipped with a time out timer. This avoids blocked channel after 2
minutes continuous TX (stuck button does no longer block a channel continuously) and
is indicated by a continuously blinking display. Should the malfunction continue the
FSG 90(X) is ready for another 2 minutes transmission period when turning OFF and ON
again (e.g. for emergency transmissions).
The transmitter blocking feature avoids transmission on a busy channel. Transmitter
blocking is usually active, but may be disabled permanently in SET-UP or manually by
pushing the SQ button.

FSG 90 System
2 General Description
8 FAV_D10024 December 2014
2.5 System and Type Approval Information
The Dual Mode VHF/AM Airband Transceivers FSG 90 and FSG 90-H1 comply for both,
the combined 8.33 kHz/25 kHz as well as "25 kHz only" channel spacing, with all
applicable National and International Type Approval requirements, for any airborne and
ground operations.
JTSO Authorization No. LBA.O.10.911/98 ETSO (LBA Luftfahrt-Bundesamt) based
on *EUROCAE ED-23B Airborne requirement is met besides 8.33 kHz requirements
also for the 25 kHz ONLY channel spacing. This JTSO Authorization was replaced by
ETSO Authorization EASA.21O.1305 in July 2009.
This also includes Immunity according to ICAO ANNEX 10 against FM Broadcast
Interference.
This also includes fulfilment of specific audio filtering required in areas with CLIMAX
operation in 25 kHz channel spacing.
* Associated EUROCAE ED-14C / RTCA DO-160C Environmental requirements.
* Associated EUROCAE ED-12B Software requirements based on ED-23B.
Complianto to BAF requirements according to German FSMusterZulV, EU
Regulations 552/2004 and 1079/2012.
BZT No. B132705J, CE Conformity,
* Associated with DIN/ISO 7637-1 DC supply in 12 Vdc vehicle.
FCC Compliance with Part 15 (receiver) and Part 87 (transmitter)
EC-Type-Approval of a type of component with regard to Directive 72/245/EEC, as
last amended by Directive 2006/28/EG.
IMPORTANT!
For the first time after one year, then every 2nd year, ground
applications using 8.33 kHz channel spacing require checking
of the high precision reference frequency (tolerance less than
± 1 ppm) and recalibration, if necessary!
Every 4th year, airborne applications using 8.33 kHz channel
spacing require checking of the high precision reference
frequency (tolerance less than ± 5 ppm) and recalibration, if
necessary!
All applications in the 25 kHz channel spacing require no
recalibration (frequency accuracy tolerance less than
± 20 ppm).
All tolerances include the full operating temperature range of
-20°C ... +55°C / -4°F ... +131°F.
Checking and recalibration must be performed by the
equipment manufacturer or through authorized and approved
avionics services. This requires use of specified test
equipment as well as applicable test procedures (software)
released by the manufacturer.

FSG 90 System
2 General Description
December 2014 FAV_D10024 9
2.6 Operating License
IMPORTANT!
Depending on national regulations, VHF/AM airborne and VHF/AM
ground operation may require an individual national operating
license. Such license is usually granted by the responsible National
Telecommunications Authority, using suitable application forms.
Besides aircraft registration, operator's name, address and
operating license payment details, state radio type, Serial number,
ETSO number EASA.21O.1305, and RegTP number A132937J, or
when applicable, the FCC ID number BVYFSG90.
2.7 Equipment supplied
Description
Article number
Dual Mode 6 Watt VHF/AM Transceiver FSG 90, Installation and
Operation manual, Operating instructions, 4 screws M 4 x 12,
Warranty 24 months
F10185
Dual Mode 10 Watt VHF/AM Transceiver FSG 90-H1, Installation
and Operation manual, Operating instructions, 4 screws M 4 x 12,
Warranty 24 months
F10302

FSG 90 System
2 General Description
10 FAV_D10024 December 2014
2.8 Optional Accessories
Wide accessory scope allows FSG 90(X) installation and operation into aircraft, in
ground systems; fixed, portable and mobile into vehicles.
Slide-in replacement adapters allow easy FSG 90(X) retrofit against former transceivers
FSG 18, FSG 40S, FSG 50, FSG 60M, using existing installations.
Description
Article no
Retrofit adapter, ready mounted –to replace FSG 70/71M
F10318
Retrofit adapter, ready mounted –to fit into mounting tray of
FSG 50/60M/40S/18
F10315
Retrofit adapter, ready mounted –to replace mounting tray of
FSG 50/60M/40S/18, fixing holes left and right
F10317
Connector kit, D-SUB 25-pin, incl. mounting hardware
F10212
BNC antenna connector, solder type
E08980
Wiring harness, 2.9 m/9.5 ft., complete with all connectors
F10189
Intercom wiring harness, 2.9 m/9.5 ft., complete with IC switch
F10190
Aircraft loudspeaker 4 Ω / 30 Watt, small, robust case, two 5-pole
sockets to connect 2 microphones or headsets, terminal for PTT key,
fits harness F10189 or F10190,
F10061
Dynamic headset, noise cancelling, coiled cord, 4-pole plug U-174/U
W00048
Adapter cable for headset W00048, to fit F10061 A/C speaker
F10036
Dynamic goose neck microphone 600 Ω, 3 m/9.8 ft. cable, 5-pole
connector, especially for gliders and motor gliders
F10039
Dynamic microphone, for PC portable, and for car mobile use, coiled
cord, PTT key, 5-pole plug
F10041
Retaining bracket, fits microphone F10041
E24907
Dynamic fist microphone, 500 Ω, coiled cord, PTT key, 5-pole plug
F10346
Microphone bracket, to keep microphone F10346
W00087
Dynamic microphone-loudspeaker, coiled cord, PTT key, 5-pole plug,
sealed
F10042
PTT key, 3.5 m/11.5 ft. cable, permanent installation on the yoke
F10050
Inline PTT key U-94A/U, coiled cord, 5-pole plug, mates A/C speaker
F10061 or Portable Cases PC / PS and headset A/N W00048, clip
allows attaching to clothing
F10125
Battery Box, 12 Vdc/7.2 Ah lead battery, sturdy steel/aluminium case,
mounting plate for quick removal, 6.3 A circuit breaker, 5-LED battery
test set, 3-pole DIN socket, mating 3-pole DIN plug
F10382
Automatic battery charger DL-50A, 115/230 Vac. Output 13.8 Vdc /
600 mA. For all airborne and portable 12 V lead batteries
F10385
Car mounting bracket
F10058

FSG 90 System
2 General Description
December 2014 FAV_D10024 11
2.9 Equipment required but not supplied
a) VHF aircraft antenna with coax cable RG-58C/U and BNC connector (Male)
b) Headphone (8 ... 600 Ohms, typical) and/or loudspeaker (2 ... 16 Ohms)
c) Non-amplified dynamic microphone, (4 ... 600 Ohm),
or amplified/carbon microphone (amplified dynamic or Electret mike), with or without
PTT key (separate mike inputs amplified/non-amplified)
d) Alternatively to b) and c) headsets with similar specifications
e) Battery Box 12 Vdc, minimum 6 Ah, for aircraft without electrical system
f) Push-to-talk key permanently installed on yoke (if microphone w/out PTT key is
used)
g) 25 pole D-SUB connector type DA-25 S and cover, if no pre-manufactured wiring
harness exists.
2.10 Information on Equipment Reliability
For use of the equipment as a ground-based radio station under normal operating
conditions (0° - 40°C operating temperature), a Mean Time Between Failure (MTBF) of
> 9,600 hours was calculated (according to MIL-HDBK-217F).
Mean Time to Repair (MTTR) will depend on shipment times. A standard turn-around
time for factory repairs will be approx. 2 weeks.

FSG 90 System
2 General Description
12 FAV_D10024 December 2014
2.11 Microphone hints
IMPORTANT!
a) Radio system reliability and performance significantly depends on
quality acoustic accessories.
b) Extremely high performance requirements - especially for 8.33
kHz Technology - demand after installation completion proper
acoustics levelling through SET-UP in order to maintain best
radio capability. Therefore, please do not use low performance
acoustics accessories.
c) Dynamic microphone requires shielded wiring. Essential
requirement is consequent separation of microphone ground /
shield from any other ground. This means, dynamic mike ground /
shield must be separated from any other grounds for DC input
and DC output, AF input and AF output like speaker, phone, PTT
and external AF input. Other grounds for DC input and output,
speaker, phone, PTT and external AF may be connected together
with the amplified mike ground.
d) Amplified microphones may contain dynamic or Electret acoustics
transducers.
e) Always ensure IDENTICAL microphones are used for parallel
operation. Similar requirements are applicable for headphone
characteristics.
f) Always ensure that during SET-UP all of the many FSG 90(X)
functions are adjusted to achieve optimized radio system
performance.
g) Operation of amplified microphone systems close to the radiating
antenna (portable case or located right behind of the cockpit) may
be influenced from strong antenna RF field strength and become
unstable, oscillates, or causes modulation distortion. Verify this
effects -possible caused by- by RF replacing the radiating
antenna against artificial antenna / RF dummy load temporarily

FSG 90 System
2 General Description
December 2014 FAV_D10024 13
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FSG 90 System
3 Installation
14 FAV_D10024 December 2014
3 Installation
3.1 General
This Section contains instructions and suggestions to be considered before installing the
radio FSG 90(X) into an aircraft. Close adherence to these suggestions will assure more
satisfactory performance from the equipment.
Information in this section is intended for certified avionics shops only. Work such as
installation, wiring and testing should only be carried out by a qualified technician!
IMPORTANT!
If installation into an aircraft is made by other than a certified avionics
shop, you have to consult your responsible Aircraft Avionics
Airworthiness Inspector - before the installation –to get authorized
certification of your completed installation.
The conditions and tests required for ETSO and FAA-TSO approval of
this article are minimum performance standards. It is the responsibility of
those desiring to install this article either on or within a specific type or
class of aircraft to determine that the aircraft installation conditions are
within the ETSO or FAA-TSO Standards. If not within the ETSO or FAA-
TSO standards, the article may be installed only if further evaluation by
the applicant documents an acceptable installation and is approved by
the Administrator.
3.2 Unpacking and Inspecting Equipment
Unpack the equipment carefully and inspect each item for evidence of damage incurred
during shipment. FSG 90 model number and serial number must comply with relevant
details mentioned in Airworthiness Approval Tag and delivery note details attached to
the shipment.
If a damage claim must be filed, save the shipping container and all packing materials to
substantiate your claim. The claim should be filed with the transportation company as
soon as possible.
If a damage is noted after the first test, notify the transportation company in writing with
advance phone or fax advice about hidden transport damage.
A copy of such a claim including all information from the type label is to be forwarded
immediately also to f.u.n.k.e. AVIONICS GmbH.
3.3 Pre-installation Test
Before installing the radio into an aircraft, vehicle or portable carrying case, a short but
comprehensive functional test by a certified avionics shop is recommended.
a) Interconnect the radio with a test wiring harness (according to figure 3-1 or 3-2) to
the test bench set-up. For FSG 90 set supply to 13.8 Vdc at radio input terminals.
For FSG 90-H1 set supply to 14.0 Vdc at radio input terminals. Turn ON the radio
with the ON/OFF-VOL switch on front panel. Switch OFF the Squelch (push SQ
button).