Becker GT6201-05 Owner's manual

Becker Avionics GmbH •Baden-Airpark B108 •77836 Rheinmünster •Germany
+49 (0) 7229 / 305-0 •Fax [phone] / 305-217
http://www.becker-avionics.com •E-mail: [e-mail]
Installation and Operation
Manual DV17001.03
Issue 06 January 2019
Article-No. 0640.093-071
VHF Transceiver
VHF Ground Transceiver
GT6201

Installation and Operation
Becker Avionics
2 GT6201 DV17001.03 Issue 06 January 2019
Approved Production and Maintenance Organization
Certificates see: http://www.becker-avionics.com/company-about/ →Certificates
Contact data for:
Europe, Asia,
Oceania and
Africa
Becker Avionics GmbH
Baden-Airpark B108
77836 Rheinmünster (Germany)
Tel.: + 49 (0) 7229 / 305-0
Fax: + 49 (0) 7229 / 305-217
Internet: www.becker-avionics.com
Email: [e-mail]
Customer Service:
Email: [e-mail]
Contact data for:
America,
Australia, Japan
Becker Avionics Inc
Email: [e-mail]
WARNING - USER RESPONSIBILITY
FAILURE OR IMPROPER SELECTION OR IMPROPER USE OF THE PRODUCTS DESCRIBED
HEREIN OR RELATED ITEMS CAN CAUSE DEATH, PERSONAL INJURY AND PROPERTY
DAMAGE.
This document and other information from Becker Avionics GmbH provide product or system options
for further investigation by users having technical knowledge.
The user is responsible for making the final selection of the system and components. The user has to
assure that all performance, endurance, maintenance, safety requirements of the application are met
and warnings be obeyed.
For this the user has to include all aspects of the application to be compliant with the applicable
industry standards and the requirements of the responsible aviation authority. The product
documentations from Becker Avionics GmbH have to be obeyed.
To the extent that Becker Avionics GmbH provide component or system options based upon data or
specifications provided by the user, the user is responsible for determining that such data and
specifications are suitable and sufficient for all applications and reasonably foreseeable uses of the
components or systems.
Term definition: User in the sense of user, installer, installation company.

Becker Avionics
Installation and Operation
DV17001.03 Issue 06 January 2019 GT6201 3
Preface
Dear Customer,
Thank you for purchasing a Becker Avionics product. We are pleased that you have chosen our
product and we are confident that it will meet your expectations.
For development and manufacturing of our product, the guidelines for highest quality and reliability
have been borne in mind, supplemented by selection of high quality material, responsible production
and testing in accordance to the standards.
Our competent customer support department will respond on any technical question you may have.
Please do not hesitate to contact us at any time.
VHF Ground Transceiver*
GT6201
(Single Block Transceiver)
GT6201-XX-R
(Remote-Controlled Transceiver)
RCU6201, RCU6211
(Remote Control Unit)
*design depends on variant
*Some figures in this manual are for basic understanding and can be different to the actual design.

Installation and Operation
Becker Avionics
4 GT6201 DV17001.03 Issue 06 January 2019
List of Effective Pages and Changes
Only technical relevant modifications are described in this table.
Document: DV17001.03 issue 06 Article Number 0640.093-071
Cover Page 01/2019
Introduction 01/2019
Chapter 1 – 5 01/2019
Issue Page No.: Section /
Chapter Description
06 1-92 all Changed: Editorial adjustments.
all Added: Information about remote-controlled variant.
-- 1.8 Added: Technical information.
-- 1.8.8 Added: Certification information.
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© by Becker Avionics GmbH / all rights reserved

Becker Avionics
Installation and Operation
DV17001.03 Issue 06 January 2019 GT6201 5
Table of Contents
1General Description .................................................................................................................... 11
1.1 Introduction.................................................................................................................................. 12
1.2 Purpose of Equipment................................................................................................................. 13
1.3 General Notes ............................................................................................................................. 13
1.4 Variants Overview ....................................................................................................................... 14
1.4.1 Software Status................................................................................................................. 14
1.4.2 Short Description .............................................................................................................. 14
1.5 Scope of Functionality................................................................................................................. 16
1.5.1 Frequency Indication......................................................................................................... 16
1.5.2 Audio Outputs ................................................................................................................... 16
1.5.3 Mike Inputs........................................................................................................................ 16
1.5.4 AF Auxiliary Input.............................................................................................................. 17
1.5.5 Sidetone ............................................................................................................................ 17
1.5.6 Squelch Operation ............................................................................................................ 17
1.5.7 Memory Channels............................................................................................................. 17
1.5.8 Scan Mode........................................................................................................................ 17
1.5.9 Illumination ........................................................................................................................ 17
1.5.10 LOW BATT Indication ....................................................................................................... 17
1.5.11 Emergency Operation ....................................................................................................... 17
1.5.12 Built-In Tests ..................................................................................................................... 18
1.5.13 Configuration Setup .......................................................................................................... 18
1.5.14 Service Mode .................................................................................................................... 18
1.6 Safety-Conscious Utilization ....................................................................................................... 19
1.7 Restriction for Use....................................................................................................................... 19
1.8 Technical Data ............................................................................................................................ 20
1.8.1General Characteristics .................................................................................................... 20
1.8.2 Receiver Data ................................................................................................................... 21
1.8.3 Transmitter Data ............................................................................................................... 22
1.8.4 Emergency Operation ....................................................................................................... 23
1.8.5 Dimensions & Weight........................................................................................................ 23
1.8.6 Software ............................................................................................................................ 24
1.8.7 Hardware .......................................................................................................................... 24
1.8.8 Certifications ..................................................................................................................... 24
1.9 Order Code.................................................................................................................................. 25
1.9.1 GT6201 ............................................................................................................................. 25
1.9.2 RCU62X1.......................................................................................................................... 25
1.9.3 Accessories....................................................................................................................... 25
1.9.4 Documentation.................................................................................................................. 25
2Installation.................................................................................................................................... 27
2.1 Limitations ................................................................................................................................... 28
2.2 Packaging, Transport, Storage ................................................................................................... 28
2.3 Device Assignment ..................................................................................................................... 29
2.3.1 Scope of Delivery.............................................................................................................. 29
2.3.2 State of Delivery................................................................................................................ 29
2.3.3 Additional Required Equipment ........................................................................................ 29
2.3.4 Type Plate......................................................................................................................... 30
2.3.5 Software/Firmware Status – Functionality ........................................................................ 30
2.4 Installation Requirements............................................................................................................ 31
2.4.1 Installation in a Vehicle ..................................................................................................... 31
2.4.2 Rear Panel Installation...................................................................................................... 31
2.5 Dimensions.................................................................................................................................. 32
2.5.1 GT6201 ............................................................................................................................. 32
2.5.2 GT6201-XX-R ................................................................................................................... 33
2.5.3 RCU62X1.......................................................................................................................... 34
2.5.4 GT6201, RCU62X1 Rear Panel Installation ..................................................................... 34
2.6 Connector Pin Assignments........................................................................................................ 35
2.6.1 Antenna Connector (GT6201) .......................................................................................... 35
2.6.2 Grounding Bolt (GT6201) ................................................................................................. 35
2.6.3 Connector P1 (GT6201).................................................................................................... 35
2.6.4 Connector J1 (GT6201) .................................................................................................... 36

Installation and Operation
Becker Avionics
6 GT6201 DV17001.03 Issue 06 January 2019
2.6.5 Inputs / Outputs (GT6201) ................................................................................................ 37
2.6.6 Connector Layout RCU62X1............................................................................................. 40
2.6.7 Connector P1 (RCU62X1)................................................................................................. 40
2.6.8 Inputs / Outputs (RCU62X1) ............................................................................................. 41
2.7 Wiring .......................................................................................................................................... 42
2.7.1 Car Cable Harness 1K044 ................................................................................................ 42
2.8 Installation and Configuration...................................................................................................... 43
2.8.1 Antenna Installation........................................................................................................... 43
2.9 Configuration Setup..................................................................................................................... 44
2.9.1 Start Configuration Setup.................................................................................................. 44
2.9.2 Configuration Setup Pages ............................................................................................... 45
2.10 Factory Default Settings .............................................................................................................. 56
2.11 Post Installation Check ................................................................................................................ 59
2.11.1 Mechanical Installation and Wiring Check ........................................................................ 59
2.11.2 Power Supply .................................................................................................................... 59
2.11.3 Receiver / Transmitter Operation ...................................................................................... 59
2.11.4 Antenna Check.................................................................................................................. 59
2.12 Error / Failure Indication .............................................................................................................. 59
2.13 Troubleshooting........................................................................................................................... 60
3Operating Instructions ................................................................................................................ 61
3.1 General ........................................................................................................................................ 61
3.2 Device Description....................................................................................................................... 61
3.2.1 Device Assignment ........................................................................................................... 61
3.2.2 Packing, Transport, Storage ............................................................................................. 61
3.2.3 Scope of Delivery .............................................................................................................. 61
3.2.4 Type Plate ......................................................................................................................... 61
3.2.5 Controls and Indications.................................................................................................... 63
3.3 Start-Up ....................................................................................................................................... 64
3.4 Receive Mode.............................................................................................................................. 65
3.5 Transmit Mode............................................................................................................................. 65
3.6 Frequency Selection Modes........................................................................................................ 66
3.6.1 Standard Mode.................................................................................................................. 67
3.6.2 Direct Tune Mode.............................................................................................................. 68
3.6.3 Channel Mode ................................................................................................................... 69
3.6.4 Frequency Storage Functions ........................................................................................... 71
3.6.5 Automatic Storage Function.............................................................................................. 72
3.6.6 Scan Mode ........................................................................................................................ 73
3.7 Squelch (SQL) ............................................................................................................................. 73
3.8 RX Field Strength Indication........................................................................................................ 74
3.9 Channel Spacing Mode ............................................................................................................... 74
3.10 Auxiliary Audio Input (AUX INPUT) ............................................................................................. 75
3.11 Menus.......................................................................................................................................... 75
3.11.1 User Menu......................................................................................................................... 76
3.12 Warning and Failure Indications.................................................................................................. 77
3.13 Contact Data................................................................................................................................ 78
4Certificates ................................................................................................................................... 79
4.1 Certificate Info ............................................................................................................................. 79
4.2 BAF Approval - GT6201 .............................................................................................................. 80
4.3 EC Declaration of Conformity – GT6201-05 ............................................................................... 82
4.4 EC Declaration of Conformity – GT6201-10 ............................................................................... 84
4.5 EC Declaration of Conformity – GT6201-05-R............................................................................ 86
4.6 EC Declaration of Conformity – GT6201-10-R............................................................................ 88
4.7 Approval - Telecommunication Office Italy.................................................................................. 90
5Index.............................................................................................................................................. 92

Becker Avionics
Installation and Operation
DV17001.03 Issue 06 January 2019 GT6201 7
List of Figures
Figure 1: GT6201 Single Block Transceiver .......................................................................................................... 14
Figure 2: GT6201 Remote-Controlled Transceiver ................................................................................................ 15
Figure 3: RCU62X1 Remote Control Unit .............................................................................................................. 15
Figure 4: Type Plate (Example) ............................................................................................................................. 30
Figure 5: Dimensions: GT6201 Single Block Transceiver...................................................................................... 32
Figure 6: Dimensions: GT6201-XX-R Remote-Controlled Transceiver.................................................................. 33
Figure 7: Dimensions RCU62X1 (Side View)......................................................................................................... 34
Figure 8: GT6201, RCU62X1 Front View............................................................................................................... 34
Figure 9: Drilling Template (Rear-Panel Installation) ............................................................................................. 34
Figure 10: GT6201 – Connector Layout................................................................................................................. 35
Figure 11: RCU62X1 - Connector Layout .............................................................................................................. 40
Figure 12: Car Cable Harness 1K044 .................................................................................................................... 42
Figure 13: "PASSWORD" ...................................................................................................................................... 44
Figure 14: "DECIVE INFO" .................................................................................................................................... 44
Figure 15: GT6201, RCU62X1: Controls and Indications ...................................................................................... 63
List of Abbreviations
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, Control Head
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)
LCD
Liquid Crystal Display
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

Installation and Operation
Becker Avionics
8 GT6201 DV17001.03 Issue 06 January 2019
List of Abbreviations
RSSI
Received Signal Strength Indication
RX
Receive
SQL
Squelch
RSSI
Received Signal Strength Indicator
SPKR
Speaker (Loudspeaker)
SRC
Source
SW
Software
TF
TufLok®, self-locking screws and threads
TX
Transmit
VOX
Voice Operated Switch
VHF
Very High Frequency
VSWR
Voltage Standing Wave Ratio
VU
Volume Unit
Units
Units
A
Ampere
mA
Milliampere
°C
Degree Celsius
cm
Centimeter
dBm
Power Ratio in Decibel referenced to 1 mW
dB
Decibel
g
Gram
Hz
Hertz
kg
Kilogram
kHz
Kilohertz
MHz
Megahertz
mm
Millimeter
Nm
Newton Meter
NM
Nautical Mile (1NM = 1852,0 m)
Ohm (Ω)
Resistance
s
Second
V
Volt
mV
Millivolt
W
Watt
mW
Milliwatt
"
Inch
°
Angular degree

Becker Avionics
Installation and Operation
DV17001.03 Issue 06 January 2019 GT6201 9
General Safety Definitions
Indicates a hazardous situation which, if not prevented, will result in death or
serious injury.
Indicates a hazardous situation which, if not prevented, could result in death or
serious injury.
Indicates a hazardous situation which, if not prevented, could result in minor or
moderate injury.
Is used to address practices not related to physical injury.
Safety instructions (or equivalent) signs indicate specific safety-related
instructions or procedures.
Disposal
The packaging material is inflammable, if it is disposed of improperly by
burning, toxic fumes may develop.
This product contains materials that fall under the special disposal regulation, which corresponds to
the EC directive for dangerous disposal material We recommend the disposal of such materials in
accordance with the current environmental laws.
•Dispose circuit boards by a technical waste dump which is approved to take on e.g.
electrolytic aluminium capacitors. Do under no circumstances dump the circuit boards with
normal waste dump.
Warranty Conditions
User modifications and changes are not permitted.
Any change made by the user excludes any liability on our part (excluding the work described in this
manual).
•The device must not be opened.
•Do not make any modifications to the device, except for those described in the manual.
•Make connections to the inputs, outputs and interfaces only in the manner described in
the manual.
•Install the devices according to the instructions.
We cannot give any guarantee for other methods.
Conditions of Utilization
General introductory notes
With this device you bought a product which was manufactured and tested before delivery with the
utmost care.
Please take your time to read the notes which you ought to follow closely during installation and
operation.
Otherwise all claims under the warranty will become void and a decreased service life or even
damages must be expected.
The user is responsible for protective covers and/or additional safety measures
in order to prevent damages to persons and electric accidents.
Additional Conditions of Utilization
Please refer to "Safety-Conscious Utilization", page 19.

Installation and Operation
Becker Avionics
10 GT6201 DV17001.03 Issue 06 January 2019
Non-Warranty Clause
We checked the contents of this publication for compliance with the associated hard and software. We
can, however, not exclude discrepancies and do therefore not accept any liability for the exact
compliance. The information in this publication is regularly checked, necessary corrections will be part
of the subsequent publications.

Becker Avionics
General Description
Introduction
DV17001.03 Issue 06 January 2019 GT6201 11
1 General Description
In this chapter you can read about:
1.1 Introduction.................................................................................................................................. 12
1.2 Purpose of Equipment................................................................................................................. 13
1.3 General Notes ............................................................................................................................. 13
1.4 Variants Overview ....................................................................................................................... 14
1.4.1 Software Status................................................................................................................. 14
1.4.2 Short Description .............................................................................................................. 14
1.4.2.1 GT6201 Single Block Transceiver............................................................................. 14
1.4.2.2 GT6201-XX-R Remote-Controlled Transceiver ........................................................ 15
1.4.2.3 RCU62X1 Remote Control Unit................................................................................. 15
1.5 Scope of Functionality................................................................................................................. 16
1.5.1 Frequency Indication......................................................................................................... 16
1.5.2 Audio Outputs ................................................................................................................... 16
1.5.3 Mike Inputs........................................................................................................................ 16
1.5.4 AF Auxiliary Input.............................................................................................................. 17
1.5.5 Sidetone ............................................................................................................................ 17
1.5.6 Squelch Operation ............................................................................................................ 17
1.5.7 Memory Channels............................................................................................................. 17
1.5.8 Scan Mode........................................................................................................................ 17
1.5.9 Illumination ........................................................................................................................ 17
1.5.10 LOW BATT Indication ....................................................................................................... 17
1.5.11Emergency Operation ....................................................................................................... 17
1.5.12 Built-In Tests ..................................................................................................................... 18
1.5.13 Configuration Setup .......................................................................................................... 18
1.5.14 Service Mode .................................................................................................................... 18
1.6 Safety-Conscious Utilization ....................................................................................................... 19
1.7 Restriction for Use....................................................................................................................... 19
1.8 Technical Data ............................................................................................................................ 20
1.8.1 General Characteristics .................................................................................................... 20
1.8.2 Receiver Data ................................................................................................................... 21
1.8.3 Transmitter Data ............................................................................................................... 22
1.8.4 Emergency Operation ....................................................................................................... 23
1.8.5 Dimensions & Weight........................................................................................................ 23
1.8.6 Software ............................................................................................................................ 24
1.8.7 Hardware .......................................................................................................................... 24
1.8.8 Certifications ..................................................................................................................... 24
1.9 Order Code.................................................................................................................................. 25
1.9.1 GT6201 ............................................................................................................................. 25
1.9.2 RCU62X1.......................................................................................................................... 25
1.9.3 Accessories....................................................................................................................... 25
1.9.4 Documentation.................................................................................................................. 25
This manual describes the Becker VHF-Ground-Transceiver GT6201. The type plate on your device
shows the part number for identification purposes (see "Type Plate", page 30).
Before starting operation of the device(s) please read this manual carefully, with particular attention to
the description referring to your device(s).

General Description
Becker Avionics
Introduction
12 GT6201 DV17001.03 Issue 06 January 2019
1.1 Introduction
The technical information in this document applies to the product and variants of GT6201.
•We use also the term GT6201 for descriptions instead writing the complete model
number.
•If a description refers to only one of the product variants its full name is used.
The manuals "Maintenance and Repair" (M&R) and "Installation and Operation" (I&O) contain the
sections:
Section DV17001.04
M&R
DV17001.03
I&O
General
X
X
Installation
X
X
Operation
X
X
Theory of Operation
X
N/A
Maintenance and Repair
X
N/A
Illustrated Parts List
X
N/A
Modification and Changes
X
N/A
Circuit Diagrams
X
N/A
Certifications
X
X
Attachments
X
N/A

Becker Avionics
General Description
General Notes
DV17001.03 Issue 06 January 2019 GT6201 13
1.2 Purpose of Equipment
The VHF-Ground-Transceivers GT6201 are specified for operations on airports, airfields or airline
operation stations.
•The GT6201 is a ground-based equipment made for installation in desk-cabinets,
19-inch racks or cars.
oThe GT6201-XX-R variant is a remote-controlled device, which does not include a
control panel. It can receive commands and supplies data through the control unit
RCU62X1 or a third-party controller.
•The GT6201 transceiver can operate with ground power but it is also made for
applications where low power consumption is required.
oGT6201 can operate from standard 14 and 28 VDC installations and from 12 or
24 VDC batteries.
•The GT6201 is for voice communication between ground and airborne stations.
oIt uses the band between 118.000...136.9916 MHz respectively 136.9750 MHz
with a selectable channel spacing of 8.33 or 25 kHz.
•The sensitive receiver meets the most recent requirements of ETSI EN 300 676.
•The receiver includes SCAN (dual watch) mode. This is for monitoring of two different
VHF frequency channels at the same time while the communication on the active
frequency is on.
•The GT6201 has a non-volatile memory for the storage of:
o99 channels with customized labels for storage of VHF frequencies.
o9 recently selected VHF frequencies are automatically stored.
•The GT6201 is easy to install.
oInstallation with four screws (rear panel installation).
oThe dimensions correspond to the standard instrument diameter of 58 mm
(2¼ inch).
1.3 General Notes
The word "frequency" is also used in the sense of "channel name", as defined in ICAO Annex 10,
Volume II.
In this document the word "memory channel" or "channel" is also used in the sense of a memory
position identified by a channel number, where a frequency may be stored for later use.

General Description
Becker Avionics
Variants Overview
14 GT6201 DV17001.03 Issue 06 January 2019
1.4 Variants Overview
GT
6201
-
XX
-
R
Identifier
Options*
R= Remote Controlled (optional)
Model Number
RF Power Class
05= 6 W RF Power Output
10=
10 W RF Power Output
* only available as component with TG660 or for customer specific applications.
1.4.1 Software Status
Description see "Software/Firmware Status – Functionality", page 30.
1.4.2 Short Description
1.4.2.1 GT6201 Single Block Transceiver
•All controls and indicators are on the front panel.
The equipment connectors and the antenna socket are at the rear side of the device.
•Installation with four screws (rear panel installation).
The dimensions agree with the standard instrument diameter of 58 mm (2¼ inch).
Figure 1: GT6201 Single Block Transceiver

Becker Avionics
General Description
Variants Overview
DV17001.03 Issue 06 January 2019 GT6201 15
1.4.2.2 GT6201-XX-R Remote-Controlled Transceiver
•The GT6201-XX-R is a remote-controlled device. It does not include a control panel.
•It can receive commands and supplies data through the RCU62X1 (Remote Control Unit)
or a third-party controller.
Figure 2: GT6201 Remote-Controlled Transceiver
1.4.2.3 RCU62X1 Remote Control Unit
•All controls and indicators are on the front panel.
The equipment connectors are at the rear side of the device.
•Installation with four screws (rear panel installation).
The dimensions agree with the standard instrument diameter of 58 mm (2¼ inch).
Figure 3: RCU62X1 Remote Control Unit

General Description
Becker Avionics
Scope of Functionality
16 GT6201 DV17001.03 Issue 06 January 2019
1.5 Scope of Functionality
1.5.1 Frequency Indication
•A liquid crystal display (LCD) do the frequency indication.
•The required operating frequency is selectable with a rotary encoder.
•The relation between the real operating frequency and the shown frequency complies with
the standards (ICAO Annex 10, Volume II).
Operating frequency
MHz
Channel spacing
kHz
Frequency shown on the display
8.33 + 25 kHz
mixed mode
25 kHz mode
118.0000 25 118.000 118.00
118.0000 8.33 118.005 N/A
118.0083 8.33 118.010 N/A
118.0166 8.33 118.015 N/A
118.0250 25 118.025 118.02
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
1.5.2 Audio Outputs
The GT6201 has four configurable outputs:
•Headphone 1 output:
oRated output power is 300 mW into 75 Ω.
•Headphone 2 output:
oRated output power is 200 mW into 75 Ω.
•Speaker output:
oRated output power is 4 W into 4 Ω.
•LINE-OUT output:
oFor ground station use only.
Note: Headphone 2 and the speaker output cannot be active at the same time.
1.5.3 Mike Inputs
•The GT6201 has four microphone inputs:
oStandard microphone input 1 (STD_MIKE1)
oStandard microphone input 2 (STD_MIKE2)
oStandard microphone input 3 (STD_MIKE3)
oDynamic microphone input (DYN_MIKE)
•Each input can operate with one single microphone or with two microphones of the same
type connected in parallel.

Becker Avionics
General Description
Scope of Functionality
DV17001.03 Issue 06 January 2019 GT6201 17
1.5.4 AF Auxiliary Input
•The AF auxiliary input is the interface to connect an external audio source (e.g. other radio
services, music-player) .
oThe interconnection of multiple external audio sources on this port make an
additional external decupling/isolation resistor necessary.
oThe external audio is audible only when the transceiver is in receiving mode.
oThe individual audio volume is set directly at the external equipment.
1.5.5 Sidetone
•The sidetone is available on the headphone output during transmission.
•The sidetone volume depends on to the intercom volume setting.
1.5.6 Squelch Operation
•The squelch (muting) circuit suppresses signals with strong signal noise (when enabled).
•There are two kinds of squelch methods implemented, carrier- and noise-squelch.
oThe carrier-squelch depends on the signal strength and is adjustable in
configuration setup.
oThe noise-squelch depends on the noise level and is adjustable in the user menu.
1.5.7 Memory Channels
•You can can store 99+9 frequencies.
oThe user can give a defined text label to each stored frequency.
oThe last recently used 9 (active) frequencies are stored automatically as "LAST"
channels.
1.5.8 Scan Mode
•The scan mode is a dual watch function.
oThe device monitors frequencies on two different channels, active & preset
frequency at the same time.
oThe signal of the active frequency is always audible it has priority at all times.
1.5.9 Illumination
•The illumination of LCD and keys is controlled from the front panel with the user menu or
externally with the dimming input lines.
•If external dimming is selected, the illumination curve (brightness to voltage relation) is
adjustable in configuration setup.
1.5.10 LOW BATT Indication
•The transceiver monitors the power supply voltage.
oIf the power supply voltage is less than the adjusted threshold, the display shows
the message "LOW BATT".
oIf the power supply voltage decreases further, an emergency operation mode
starts.
1.5.11 Emergency Operation
•If the power supply voltage is < 10.25 V, the device continues operation with decreased
performance.
•If power supply voltage is < 9.0 V, the device switches off automatically.

General Description
Becker Avionics
Scope of Functionality
18 GT6201 DV17001.03 Issue 06 January 2019
1.5.12 Built-In Tests
Power-On Built-In Test
•After power-on, the device starts a self-test (PBIT).
oThe display shows the message "WAIT" and the software versions of the control
head and the chassis module.
oIf there is an error the display shows the message "FAILURE, push any key".
oIf there is no error the transceiver changes to the last active mode before power
off.
Continuous Built-In Test
•During normal operation, a self-test (CBIT) permanently examine the correct operation of
the device.
oThe display shows an error message, if there is an error during CBIT.
1.5.13 Configuration Setup
The configuration setup is for the configuration of installation and device parameters such as mike
sensitivity, mike type selection, speaker enable/disable and other parameters.
1.5.14 Service Mode
•The service mode is a special configuration mode.
•You can get access to the service mode through the RS422 interface with a proprietary
serial data communication protocol.
•This mode is for use by authorized maintenance organizations only.

Becker Avionics
General Description
Restriction for Use
DV17001.03 Issue 06 January 2019 GT6201 19
1.6 Safety-Conscious Utilization
For safe operation of the product the notes have to be obeyed:
•The installation may be carried out only by authorized personnel. The
country regulations always have to be obeyed.
•Use the device only within the specified conditions, see "Technical
Data", page 20.
•Power supply:
oDo not connect the device to AC sources.
oMake sure that the device is connected to the mandatory
DC source, see "Technical Data", page 20.
oDo not connect the device with reversed polarity to the DC source.
•Circuit breaker:
oUse the recommended fuses in the power supply line for the
protection of the application, see "Technical Data", page 20.
Cleaning:
•Do not use aggressive cleaning agents e.g. Acetone.
oThese cleaning agents can cause damages.
1.7 Restriction for Use
The product is to be used inside the declared limits.

General Description
Becker Avionics
Technical Data
20 GT6201 DV17001.03 Issue 06 January 2019
1.8 Technical Data
1.8.1 General Characteristics
GT6201
Specifications
Nominal supply voltage range
11.0…30.3 VDC
Extended supply voltage range
10.25…32.2 VDC
Emergency operation
9.0...10.25 VDC
Dimming control voltage
0…14 VDC or 0…28 VDC
Internal fuse protection
7 A
Recommended external fuse protection
5 A
Frequency range
118.000...136.990 MHz
Channel spacing
8.33 / 25 kHz
Number of channels
25 kHz channel spacing
760 (118.000…136.975)
8.33 kHz channel spacing
2280 (118.000…136.990)
Modulation type
AM
25 kHz
8.33 kHz
6K80A3EJN
5K00A3EJN
Temperature range
Operating: -20...+55 °C
Storage: -55...+85 °C
Power consumption
Power off state @ 12 VDC
GT6201-05 (6 W): ≤0.10 mA
GT6201-10 (10 W): ≤0.10 mA
GT6201-05-R (6 W): ≤0.10 mA
GT6201-10-R (10 W): ≤0.10 mA
Power off state @ 24 VDC
GT6201-05 (6 W): ≤0.10 mA
GT6201-10 (10 W): ≤0.10 mA
GT6201-05-R (6 W): ≤0.10 mA
GT6201-10-R (10 W): ≤0.10 mA
Reception standby mode @ 12 VDC,
panel backlight off
GT6201-05 (6 W): ≤140 mA
GT6201-10 (10 W): ≤140 mA
GT6201-05-R (6 W): ≤120 mA
GT6201-10-R (10 W): ≤120 mA
Reception standby mode @ 24 VDC,
panel backlight off
GT6201-05 (6 W): ≤80 mA
GT6201-10 (10 W): ≤80 mA
GT6201-05-R (6 W): ≤80 mA
GT6201-10-R (10 W): ≤80 mA
Transmission mode @ 12 VDC,
VSWR=1:1
GT6201-05 (6 W): 2.0 A @ 85%
GT6201-10 (10 W): --
GT6201-05-R (6 W): 2.0 A @ 85%
GT6201-10-R (10 W): --