Becker GT6201-05, GT6201-10 Installation And Operation Manual

VHF-Ground-Transceiver

GT6201-05

GT6201-10

Software Versions:

SCI1050S305 Version 3.08

SCI1051S305 Version 1.56

and upwards

Installation and Operation

Manual

Manual DV 17001.03

Issue 4 January 2015

Becker Avionics GmbH ● Baden Airpark B108 ● 77836 Rheinmünster ● Germany

Telephone [phone] / 305-0 ● Fax [phone] / 305-217

http://www.becker-avionics.com ● e-mail: [e-mail]

Cover Page

01/2015

I … VI

01/2015

1 … 52

01/2015

FIRST ISSUE AND CHANGES

Issue 1 not published
Issue 2 not published
Issue 3 not published
Issue 4 January 2015

GT6201

LIST OF EFFECTIVE PAGES

Page No.: Date: Page No.: Date:

DV 17001.03 / Article Number 0640.093-071

© 2015 by Becker Avionics GmbH / All rights reserved

GT6201

Preface

Dear Customer,

Thank you for purchasing this BECKER AVIONICS product. We are confident that our GT6201
VHF-Ground-Transceiver will meet your expectations.

GT6201 VHF Ground-Transceivers are a modern family of communication equipment that have
comprehensive capabilities and significantly extend the typical aeronautical transceivers. All
GT6201 VHF Ground-Transceivers variants are not approved for flight!
For airborne use the BECKER AR6201 series perfectly corresponds to the GT6201.

Despite its small size and weight GT6201 include inter alia:

• A sensitive receiver which meets the most recent requirements of ETSI EN 300 676.

• A receiver that includes SCAN (dual watch) mode which allows simultaneous monitoring of

two different VHF frequency channels without interrupting communication on the active
frequency.

• A high efficiency transmitter which delivers more than 10W modulated or un-modulated RF
output power at 28V supply voltage or 6W at 12V supply voltage. The general low power
consumption of the unit allows longer operation time from a back-up battery.

• Non-volatile frequency (channel) memory:

o 99 VHF frequencies, stored in dedicated channels, can manually be labeled with up to

10 characters for easy identification which service is related to the currently selected
channel. (“TWR”, “ATIS”, “APPROACH”, etc.)

o 9 recently selected VHF channels are automatically stored.

GT6201 Certification:

Bundesaufsichtsamt für Flugsicherung

Approval No.: D-0030/2014

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GT6201

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Page II DV 17001.03 Issue 4 01/2015

GT6201

Table of Contents

List of Abbreviations V

Section 1 GENERAL DESCRIPTION 1

1.1 Introduction .......................................................................................................... 1

1.2 Purpose of Equipment ......................................................................................... 1

1.3 General Notes ..................................................................................................... 1

1.3.1 GT6201 Single Block Transceiver ........................................................................ 2

1.4 Features Overview............................................................................................... 3

1.5 Technical Data ..................................................................................................... 5

1.5.1 Power Supply Data .............................................................................................. 5

1.5.2 General Data ....................................................................................................... 6

1.5.3 Dimensions & Weight .......................................................................................... 6

1.5.4 Receiver Data ...................................................................................................... 7

1.5.5 Transmitter Data .................................................................................................. 7

1.5.6 Emergency Operation .......................................................................................... 8

1.5.7 Regulatory Compliance ....................................................................................... 8

1.5.8 Accessories ......................................................................................................... 9

Section 2 INSTALLATION 11

2.1 Limitations ......................................................................................................... 11

2.2 Unpacking the Equipment and Preparation for Installation ................................. 11

2.3 Mechanical Installation ...................................................................................... 11

2.4 Electrical Installation .......................................................................................... 12

2.4.1 Connectors and Pin Assignment for GT6201 ..................................................... 13

2.4.2 Inputs / Outputs Detailed Description ................................................................. 15

2.5 Installation and Configuration of GT6201 Transceivers ...................................... 18

2.6 Antenna Installation ........................................................................................... 19

2.7 Installation Setup for GT6201 ............................................................................ 19

2.7.1 Entering Installation Setup ................................................................................. 19

2.7.2 Leaving Installation Setup .................................................................................. 19

2.7.3 Page Up / Page Down in the Installation Setup .................................................. 19

2.7.4 Storage of Setup Data ....................................................................................... 19

2.7.5 Terminate Installation Setup .............................................................................. 19

2.7.6 VU Meter ........................................................................................................... 20

2.7.7 Installation Setup Pages - Data Description ....................................................... 20

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DV 17001.03 Issue 4 01/2015 Page III

GT6201

2.8 Factory Default Settings ..................................................................................... 30

2.9 Typical Post Installation Checks ........................................................................ 32

2.9.1 Mechanical Installation and Wiring Check .......................................................... 32

2.9.2 Power Supply .................................................................................................... 32

2.9.3 Receiver / Transmitter Operation ....................................................................... 32

2.9.4 Antenna Check .................................................................................................. 32

2.10 Trouble Shooting ............................................................................................... 33

Section 3 OPERATION 35

3.1 Safety Instructions ............................................................................................. 35

3.2 Controls and Indications .................................................................................... 35

3.2.1 Controls ............................................................................................................. 36

3.2.2 Symbols Shown on the Display .......................................................................... 36

3.3 Start-Up ............................................................................................................. 37

3.4 Receive and Transmit Mode .............................................................................. 37

3.4.1 Receive Mode .................................................................................................... 37

3.4.2 Transmit Mode ................................................................................................... 37

3.5 Frequency Selection Modes .............................................................................. 38

3.5.1 Standard Mode .................................................................................................. 38

3.5.2 Direct Tune Mode .............................................................................................. 39

3.5.3 Channel Mode ................................................................................................... 40

3.5.4 Scan Mode ........................................................................................................ 41

3.6 Squelch ............................................................................................................. 42

3.7 RX Field Strength Indication .............................................................................. 42

3.8 Channel Spacing Mode ...................................................................................... 43

3.9 Storage Function ............................................................................................... 43

3.9.1 Manual Storage Function ................................................................................... 43

3.9.2 Automatic Storage Function ............................................................................... 44

3.10 Auxiliary Audio Input .......................................................................................... 44

3.11 VOX & Speaker Operation (not used for ground applications) ........................... 45

3.12 Menus ................................................................................................................ 45

3.12.1 Intercom Menu (not used for ground applications) ............................................. 45

3.12.2 Users Menu ....................................................................................................... 46

3.13 Warning and Failure Indications ......................................................................... 47

Section 4 Certification Document 49

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Page IV DV 17001.03 Issue 4 01/2015

GT6201

List of Abbreviations

AF .................... Audio Frequency

ATT .................. Attenuation

AUX ................. Auxiliary

AWG ................ American Wire Gauge

BNC ................. Bayonet Neill Concelman

CBIT ................ Continuous Built-In Test

CFG ................. Configuration

CH ................... Channel

COM ................ Communication

DC ................... Direct Current

EASA ............... European Aviation Safety Agency

EMI .................. Electro Magnetic Interference

ETSI................. European Telecommunications Standards Institute

ETSO ............... European Transmission System Operators

GCM ................ Chassis Module (ETIS compliant for ground use)

GND................. Ground (Vehicle Ground)

HMI .................. Human Machinery Interface

HIRF ................ High Intensity Radiated Fields

HW................... Hardware

IC ..................... Intercom (not in use for ground applications)

I&O .................. Installation & Operation

LCD ................. Liquid Crystal Display

M&R................. Maintenance & Repair

MTBF ............... Mean Time Between Failure

MTTR............... Mean Time To Repair

N/A................... Not Applicable

PBIT................. Power-On Built In Test

PTT .................. Push To Talk

PWR ................ Power

RSSI ................ Received Signal Strength Indication

RX.................... Receive

SQL ................. Squelch

RSSI ................ Received Signal Strength Indicator

SN.................... Serial Number

SPKR ............... Speaker (Loudspeaker)

SRC ................. Source

SW ................... Software

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DV 17001.03 Issue 4 01/2015 Page V

GT6201

TSO ................. Technical Standard Order

TX .................... Transmit

VOX ................. Voice Operated IC Threshold (not in use for ground applications)

VHF .................. Very High Frequency

VDC ................. Voltage Direct Current

VSWR .............. Voltage Standing Wave Ratio

VU .................... Volume Unit

Units

V ...................... Volt

mV ................... Millivolt

A ...................... Ampere

mA ................... Milliampere

W ..................... Watt

mW .................. Milliwatt

Hz .................... Hertz

kHz ................... Kilohertz

MHz ................. Megahertz

s ...................... Second

dBm ................. Power level related to 1 Milliwatt in decibels

dB .................... Decibel

Ω ...................... Ohm

g ....................... Gramm

kg ..................... Kilogram

°C ..................... Degree Celsius

mm ................... Millimeter

cm .................... Centimeter

ppm .................. Parts per Million

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Page VI DV 17001.03 Issue 4 01/2015

GT6201

Section 1 GENERAL DESCRIPTION

1.1 Introduction

This manual describes the operation and installation of the GT6201 VHF Transceiver Family. The
ID label on your device shows the part number for identification purposes.

Before starting to operate the unit(s), please read this manual carefully with particular attention to
the description referring to your device. This manual also contains several optional elements of the
system (second controller for example), that may not be contained in your delivery package and in
that case are not applicable.

The manuals DV 17001.03 I&O (“Installation and Operation”) and DV 17001.04 M&R

aintenance and Repair”) contain the following sections:

(“M

Section

DV 14307.03

I&O

1 General X X

2 Installation X X

3 Operation X X

4 Theory of Operation N/A X

5 Maintenance and Repair N/A X

6 Illustrated Parts List N/A X

7 Modification and Changes N/A X

8 Circuit Diagrams N/A X

DV 14307.04

M&R

1.2 Purpose of Equipment

The GT6201 enables voice communication between ground and airborne station, using the very
high frequency band between 118.000 and 136.9916 MHz respectively 136.9750 with a selectable
channel spacing of 8.33 kHz or 25 kHz. The GT6201 VHF Ground-Transceiver is ground-based
equipment.

The GT6201 Transceiver can operate using ground power when installed in desk-cabinets or

19 inch racks, but is also dedicated to applications where low power consumption is required.
GT6201 is capable to operate from standard 14V DC and 28V DC installations and from 12V DC or
24V DC batteries.

1.3 General Notes

On the following pages the GT6201 transceiver is named in two different senses. The common
model name GT6201 is used in such cases a description applies for all variants of the GT6201,
otherwise the applicable models are typed with its complete model name

In this document the word “frequency” is also used in the sense of “channel name”, as defined in
ICAO Annex 10, Volume II.

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DV 17001.03 Issue 4 01/2015 Page 1

GT6201

In this document the word “memory channel” or “channel” means a memory place identified by a
channel number, where a frequency may be stored for later use.

1.3.1 GT6201 Single Block Transceiver

Air traffic services require efficient, secure, modern and user friendly communication equipment.
Becker´s radio systems offer well-proportioned solutions for small to medium-sized airports,
airfields or airline operations stations.

Assembled with quality-proven components, engineered with state-of-the-art technology and
driven with a customer focused philosophy, our radio-communications solutions provide high
flexibility and scalability.

In continuation of the very successful portable/mobile VHF transceiver BECKER AR4201, the
new VHF Transceiver GT6201 for ground applications offers latest standards and is ideally suited
for vehicle installations and constitutes the basis element for a variety of other products like the
GK61X portable system or the TG660 (19 inch) series.

Designed for operations at airfields and airports in a very demanding environment, the GT6201
offers latest technology and comfortable operation on all frequency channels in the aeronautical
VHF frequency band, adjustable in 25 kHz steps as well as in 8.33 kHz steps. The user friendly
operator menu and the extensive setup possibilities allow a very personal setup for the user. The
large, clear and dazzle-free LC display shows the active frequency and either the standby
frequency or memory channel.

With an output power of 6W or 10W, the transmitter is strong enough for medium range
communications, ensuring a low cost of ownership for the customer.

Derived from its airborne counterpart AR6201, the GT6201 is the robust, reliable and flexible
solution for your ground operations.

Available models:

GT6201-05 VHF Ground Transceiver, 6 Watt (at 11 …30.3 V/DC)

Article-No. 0637.351-923

GT6201-10 VHF Ground Transceiver, 10 Watt (at 24 …. 30.3 V/DC)

Article-No. 0637.361-923

Figure 1-1: GT6201-XX Single Block Transceiver; 58 mm (2 ¼ inch) standard

instrument cut-out

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Page 2 DV 17001.03 Issue 4 01/2015

Frequency (MHz)

(kHz)

Displayed Frequency

Mode

only Mode

118.0000

25

118.000

118.00

118.0083

8.33

118.010

N/A

118.0166

8.33

118.015

N/A

etc.

etc.

etc.

etc.

136.9750

25

136.975

136.97

136.9750

8.33

136.980

N/A

136.9833

8.33

136.985

N/A

136.9916

8.33

136.990

N/A

GT6201

1.4 Features Overview

Frequency Indication

A liquid crystal display (LCD) provides the frequency indication. The required operating frequency
is set by means of the rotary knob. The relation between the real operating frequency and the
displayed frequency is according to standard (ICAO Annex 10, Volume II). For an overview, refer to
the table below.

Operating

118.0000 8.33 118.005 N/A

118.0250 25 118.025 118.02

Audio Outputs

The GT6201 VHF Transceiver includes four fully configurable outputs:

• Headphone 1 output, rated output power is 300 mW into 75 Ohm, (with floating transformer
output)

Channel Spacing

8.33 / 25 kHz mixed

25 kHz

• Headphone 2 output, rated output power is 200 mW into 75 Ohm, (differential output DC

• Speaker output, rated output power is 4 W into 4 Ohm, (asymmetric AC-coupled output)

• LINE-OUT output intended for ground station use only. (asymmetric AC-coupled output)

Note: Headphone 2 and speaker output cannot be active at the same time

Mike Inputs

GT6201 has an input for dynamic microphone (DYN_MIKE) and an input for standard microphone
(STD_MIKE).

The GT6201 VHF Transceiver provides four microphone inputs:

• Standard microphone input 1 (STD_MIKE1),

• Standard microphone input 2 (STD_MIKE2),

• Standard microphone input 3 (STD_MIKE3),

• Dynamic microphone input (DYN_MIKE).

Each input is able to operate with one single microphone or with two microphones of the same type
connected in parallel.

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DV 17001.03 Issue 4 01/2015 Page 3

coupled)

GT6201

AF Auxiliary Input

The AF auxiliary input is an interface to connect external audio (e.g. other radio services, music­player) to the transceiver. Interconnection of multiple external audio sources on this particular port
requires additional external decupling/isolation resistors. The external audio is audible only when
the transceiver is in the receive mode.

The individual audio volume is set directly at the particular external equipment.

Sidetone

The sidetone is available on the headphone output during transmission. The sidetone volume
automatically adapts to the intercom volume setting.

Squelch Operation

When enabled the squelch (muting) circuit suppresses weak signals. There are two kinds of
squelch methods implemented: carrier squelch and noise squelch. The carrier squelch depends on
received signal strength and is adjustable in the installation setup; the noise squelch depends on
detected signal to noise ratio and is adjustable in the user setup.

Memory Channels

The memory function allows storage of up to 99+9 frequencies. This memory can contain up to 99
user defined frequencies stored manually that can be labeled with channel numbers and assigned
text label.

Generally the last recently used (active) 9 frequencies are stored automatically as “LAST”
channels. If any of the last used frequencies is also stored in the 99 user channels and a text label
is attached, this text will appear on the display too.

Scan Mode

In scan mode a dual watch function is provided. The device is capable of monitoring frequencies on
two channels, active & preset simultaneously. The signal of the active frequency will always be
audible, since it will have priority at all times.

Illumination

The illumination of LCD and push buttons can be controlled either directly from the front panel via
the users menu or externally via the dimming input lines. If the external dimming is selected, the
illumination curve (brightness to voltage relation) can be adjusted in the installation setup.

LOW BATT Indication

The VHF transceiver monitors power supply voltage. If the supply voltage drops below the
adjustable threshold, the display indicates the message “LOW BATT”. If the power supply voltage
drops further, emergency operation mode is entered.

Emergency Operation

If the power supply voltage drops below 10.25 V, the VHF transceiver continues operation with
degraded performance. In case the power supply drops below 9.0V the unit is automatically
switched off.

Built-in Tests PBIT and CBIT

After power-up, the unit performs a self-test (power-up built-in test / PBIT). During PBIT the
transceiver displays “WAIT” and the corresponding software versions of both, the control head and
chassis module.

If faults are detected during PBIT, the error message “FAILURE, press any key” is displayed. If no
faults are detected the transceiver automatically activates the mode set before last power-off.

During normal operation a continuous built-in test (CBIT) permanently verifies the correct operation
of the unit. If a problem is detected during CBIT, an error message will be displayed.

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Page 4 DV 17001.03 Issue 4 01/2015

GT6201-10
10 Watt *

0…28 V DC

0…28 V DC

@ 12 VDC, VSWR=1:1

1.7A at 0%

@ 24 VDC, VSWR=1:1

1.25A at 0%

GT6201

Installation Setup

Via the installation setup the configuration of the installation parameters, such as mike sensitivity,
mike type selection, speaker enable/disable plus other parameters is available.

Service Mode

The service mode is a special configuration mode accessible via RS422 interface with a proprietary
serial data communication protocol. This mode is for use by authorized maintenance personnel
only.

1.5 Technical Data

1.5.1 Power Supply Data

For GT6201 units the following data applies:

Nominal supply voltage range ....................... 11.0 … 30.3 V

Extended supply voltage range ..................... 10.25 V … 32.2V

Emergency operation .................................... 9.0 V to 10.25 V

Dimming control ............................................ 0…14 V or 0…28 V

Typical Power Consumption

Nominal supply voltage range 11.0 … 30.3 V DC 11 … 30.3 V DC

Extended supply voltage range 10.25 … 32.2 V DC

Emergency operation 9.0 V 9.0 V

Dimming control

Typical current consumptions

Power off state @ 12 VDC ≤ 0.10 mA --

Power off state @ 24 VDC ≤ 0.10 mA ≤ 0.10 mA

GT6201-05
6 Watt

0…14 V DC or

10.25 … 32.2 V
DC

0…14 V DC or

Reception stand-by mode @ 12 VDC, panel backlight off ≤ 140 mA ≤ 140 mA

Reception stand-by mode @ 24 VDC, panel backlight off ≤ 80 mA ≤ 80 mA

Transmission mode

Transmission mode

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DV 17001.03 Issue 4 01/2015 Page 5

2.0A at 85%

--

--

1.5A at 85%

GT6201-10
10 Watt *

Frequency range

118.000 MHz to 136.9916 MHz

Channel spacing

8.33/25 kHz

Number of channels

2280 + 760

Storage temperature range

-55°C to +85°C

Operating temperature range

-20°C to +55°C

GT6201-XX

Front panel

61.2 mm x 61.2 mm

(front plate till end of antenna connector)

58 mm diameter (2

inch)

Material of Case

ALMg

Surface treatment

control head coated with black matt paint

Weight

645g

1.5.2 General Data

GT6201

*: 6 to 10 W TX power between 11 … 24 V/DC, 10 W at 24 V/DC and above.

1.5.3 Dimensions & Weight

Depth of unit

Mounting

GT6201-05
6 Watt

187.8 mm

(back panel) standard

1/4

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Page 6 DV 17001.03 Issue 4 01/2015

GT6201

(measured with psophometric filter)

Effective bandwidth
(8.33 kHz channel spacing)

Effective bandwidth
(25 kHz channel spacing)

≤ 6 dB

in range -101 dBm to -1 dBm

≤ 5%

at 90%, 50% of rated output power

Audio frequency response
(8.33 kHz channel spacing)

+2 dB / -4 dB 350 Hz to 2500 Hz

relative to 1000 Hz

Audio frequency response
(25 kHz channel spacing)

+2 dB / -4 dB 300 Hz to 3400 Hz

relative to 1000 Hz

Rated output power
for headphone 1 operation

≥ 300 mW into 75 Ohm

≥ 100 mW into 600 Ohm

Rated output power
for headphone 2 operation

≥ 200 mW into 75 Ohm

≥ 100 mW into 600 Ohm

50 mV to 8 V (adjustable) across 600

Ohm

GT6201

1.5.4 Receiver Data

≤ -101 dBm for a SINAD of 12 dB

(nominal)

Sensitivity

Squelch trigger level adjustable

AGC characteristic

Distortion

Audio Noise ≥ 40 dB at 90%

≤ -95 dBm for a SINAD of 12 dB

(under extended and extreme

environmental conditions)

±2.8 kHz

±8.5 kHz

at 30%, 50% of rated output power

≤ 10%

Rated output for speaker operation ≥ 4 W into 4 Ohm

Audio auxiliary input

Offset-Carrier operation N/A

1.5.5 Transmitter Data

GT6201-05 GT6201-10

Output power into 50 Ohm (with and without
modulation)

Frequency tolerance ≤ ±1 ppm

Duty cycle 120 sec (TX) : 480 sec (RX)

Type of modulation

≥ 6 W ≥ 10 W

6K80A3EJN
5K00A3EJN

Modulation capability ≥ 85%

Distortion ≤ 10%

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DV 17001.03 Issue 4 01/2015 Page 7

Part Number

Article Number

GT6201-10

0637.361-923

GT6201-05

0637.351-923

GT6201

GT6201

Audio frequency response
(8.33 kHz channel spacing)

Audio frequency response
(25 kHz channel spacing)

Dynamic microphone
(with compressor)

Standard microphone(s)
(with compressor)

FM deviation with modulation ≤ 3 kHz (</= 800Hz typically)

Sidetone Adjustable

Automatic shutdown of transmit mode

350 Hz to 2500 Hz relative to 1000 Hz

300 Hz to 3400 Hz relative to 1000 Hz

1 … 20 mV compressor starting point,

10 … 1000 mV compressor starting

120 sec (Factory configurable 30 sec …

-4 dB / +2 dB in band

≤ -25 dB above 3200 Hz

-4 dB / +2 dB in band

≤ -25 dB above 5000 Hz

adjustable

Input balanced, 140 Ω

Input range up to 20 dB above

compressor starting point.

point, adjustable

Input unbalanced, 110 Ω

Input range up to 20 dB above

compressor starting point.

120 sec)

1.5.6 Emergency Operation

Panel & Display Backlight ............................. switched off for saving BATT energy

TX Output Power ........................................... ≥ 2 W into 50 Ω (with modulation)

TX Modulation Depth ..................................... ≥ 50 %

RX Sensitivity................................................. ≤-93 dBm for a (S+N)/N ratio of 6 dB

1.5.7 Regulatory Compliance

Note: Unauthorized changes or modifications to the GT6201 VHF transceivers may

void the compliance to the required regulatory agencies and authorization for
continued equipment usage.

GT6201 complies with ETSI EN 300 676 regulations

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Page 8 DV 17001.03 Issue 4 01/2015

923

Dynamic Microphone

951

Speaker with housing and cables

882

Car mounting

953

Cable harness

950

Antenna

952

Antenna cable, length 2.5 m

950

GT6201-XX and GT6201-XX-R

GT6201-XX and GT6201-XX-R

GT6201

1.5.8 Accessories

Available accessories for GT6201 can be purchased with the following Article Numbers. The
connector kit or mounting kit as required for equipment installation is normally included in the
delivery of your purchased Transceiver. The following information is needed for spare part order.

Vehicle Kit VK4201

1PM012

1PL011

1E024

1K044

1A002

1KA003

Available Documentation:

Article-No.: 0892.424-

Article-No.: 0344.214-

Article-No.: 0524.352-

Article-No.: 0499.226-

Article-No.: 0892.513-

Article-No.: 0267.015-

Article-No.: 0267.082-

Operating Instructions (DV 17001.03)

Maintenance and Repair Manual (DV 17001.04)

Article No.: 0640.093-071

Article No.: 0640.107-071

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