Becker AR6201 Series Guide

VHF-Transceiver
Family
AR6201-(X1X)
AR6201-(X2X)
RT6201-(X10)
RT6201-(X20)
RCU6201-(X1X)
AR6203-(X1X)
AR6203-(X2X)
Software Versions:
SCI1050S305 Version 3.07
SCI1051S305 Version 1.51
and upwards
Installation
Operation
Manual DV 14307.03
Issue 1 September 2013
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]
AR6201
RCU6201
RT6201
AR6203

FIRST ISSUE AND CHANGES
Issue 1 September 2013
LIST OF EFFECTIVE PAGES
Page No.: Date: Page No.: Date:
Cover Page 09/2013
I … VIII 09/2013
1-1 … 1-20 09/2013
2-1 … 2-66 09/2013
3-1 … 3-20 09/2013
DV 14307.03 / Article Number 0638.404-071
© 2013 by Becker Avionics GmbH / All rights reserved

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DV 14307.03 Issue 1 09/2013 Page I
Preface
Dear Customer,
Thank you for purchasing BECKER products.
We are pleased that you have chosen our product and we are confident
that it will meet your expectations.
AR620X-(XXX) VHF Transceivers are a modern family of communication
equipment that have comprehensive capabilities and significantly extend
the typical aeronautical transceivers.
Despite its small size and weight 620X- aircraft radio include inter
alia:
•Sensitive receiver which meets the most recent requirements of ED-
23C, including the ability to work in the offset-carrier (climax)
operation in 25 kHz and 8.33 kHz channel spacing (class H2).
•Receiver that includes SCAN (dual watch) mode. This allows
simultaneous monitoring of two different VHF frequency channels
without interrupting communication on the active frequency.
•High efficiency transmitter which delivers more than 10W modulated or
un-modulated output power at 28V supply voltage or 6W at 12V. Low
power consumption allows longer operation from battery.
•Extended built-in intercom which can work as:
o4-way intercom with isolation mode – passengers could continue
conversation or listening to music from MP3 player at the same
time as pilots talk via intercom or communicate with the tower.
o2-way intercom for tandem operation – pilot and co-pilot work
with separate controllers and can control their individual
audio parameters, like volume or VOX. This mode is preferred
especially for training due to full synchronization of LCD
contents.
•Non-volatile memory for storing:
o99 VHF channels can manually be labeled for storage of VHF
channels
o9 recently selected VHF channels are automatically stored

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Table of Contents
List of Abbreviations VI
Section 1 GENERAL DESCRIPTION 1-1
1.1 Introduction 1-1
1.2 Purpose of Equipment 1-1
1.3 General Notes 1-2
1.4 Variants Overview 1-2
1.5 Short Description 1-3
1.5.1 AR6201 Single Block Transceiver 1-4
1.5.2 RT6201 Remote Transceiver 1-4
1.5.3 RCU6201 Remote Control Unit 1-5
1.5.4 AR6203 Single Block Transceiver 1-6
1.6 Features Overview 1-6
1.7 Technical Data 1-9
1.7.1 Power Supply Data 1-9
1.7.2 General Data 1-10
1.7.3 Dimensions & Weight 1-11
1.7.4 Receiver Data for AR620X and RT6201 1-11
1.7.5 Transmitter Data AR620X and RT6201 1-12
1.7.6 Emergency Operation 1-12
1.7.7 Software 1-13
1.7.8 Complex Hardware 1-13
1.7.9 Regulatory Compliance 1-13
1.8 Environmental Qualification AR620X and RCU6201 1-14
1.9 Environmental Qualification RT6201 1-16
1.10 Accessories 1-18

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DV 14307.03 Issue 1 09/2013 Page III
Section 2 INSTALLATION 2-1
2.1 Limitations 2-1
2.2 Unpacking the Equipment and Preparation for
Installation 2-1
2.3 Mechanical Installation 2-1
2.3.1 AR6201 and RCU6201 Installation 2-1
2.3.2 AR6203 Installation 2-3
2.3.3 RT6201 Installation 2-5
2.4 Electrical Interface 2-8
2.4.1 Connectors and Pin Assignment for AR6201, AR6203
and RT6201 2-8
2.4.2 Inputs / Outputs Detailed Description 2-11
2.4.3 Connector and Pin Assignment for RCU6201 2-16
2.5 Installation and Configuration of 620X Transceivers 2-17
2.6 Antenna Installation 2-18
2.7 Installation Setup for RT/AR6201-(X1X) 2-19
2.7.1 Entering Installation Setup 2-19
2.7.2 Leaving Installation Setup 2-19
2.7.3 Page Up / Page Down in the Installation Setup 2-19
2.7.4 Storage of Setup Data 2-19
2.7.5 Terminate Installation Setup 2-19
2.7.6 VU Meter 2-20
2.7.7 Installation Setup Pages - Data Description 2-20
2.8 Factory Default Settings 2-35
2.9 Typical Installations with Recommended Settings and
Wiring Diagrams 2-37
2.9.1 Single Seat Glider 2-37
2.9.2 Twin Seat Motor Glider 2-40
2.9.3 General Aviation (GA) Aircraft using Standard
Microphones 2-42
2.9.4 Installation Setup for individual dual headset
configuration (two IC circuit) 2-44

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2.9.5 Installation Setup for Twin Seat with AR6201 Tandem
Configuration 2-46
2.9.6 Wiring for Aircraft with Four Seats (no TANDEM) 2-48
2.9.7 Installation with RT6201 2-51
2.9.8 Aircraft with Intercom System 2-52
2.9.9 Installation Setup for Twin Seat with RT6201 Tandem
Configuration 2-55
2.10 Retrofitting an AR4201 with an AR620X 2-57
2.10.1 Pin Compatibility 2-57
2.10.2 Dynamic Microphone Input 2-59
2.10.3 Temperature Sensor 2-59
2.10.4 RS-232 Interface 2-59
2.10.5 AFCU/AGC/AFWB 2-60
2.10.6 CPIN 2-60
2.10.7 +13.75V Switched 2-60
2.10.8 PWR_EVAL 2-60
2.11 Post Installation Tests 2-60
2.11.1 Mechanical Installation and Wiring Check 2-60
2.11.2 Power Supply 2-60
2.11.3 Receiver / Transmitter Operation 2-61
2.11.4 Antenna Check 2-61
2.11.5 Interference Check 2-61
2.11.6 Flight Test Check 2-63
2.12 Trouble Shooting 2-63
2.13 Continued Airworthiness 2-65

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DV 14307.03 Issue 1 09/2013 Page V
Section 3 OPERATION 3-1
3.1 Safety Instructions 3-1
3.2 Controls and Indicators 3-2
3.2.1 Controls 3-2
3.2.2 Symbols Shown on the Display 3-3
3.3 Start-Up 3-3
3.4 Receive and Transmit Mode 3-4
3.4.1 Receive Mode 3-4
3.4.2 Transmit Mode 3-4
3.5 Frequency Selection Modes 3-5
3.5.1 Standard Mode 3-5
3.5.2 Direct Tune Mode 3-6
3.5.3 Channel Mode 3-7
3.5.4 Scan Mode 3-9
3.6 Squelch 3-10
3.7 RX Field Strength Indication 3-10
3.8 Channel Spacing Mode 3-11
3.9 Storage Function 3-11
3.9.1 Manual Storage Function 3-11
3.9.2 Automatic Storage Function 3-13
3.10 Auxiliary Audio Input 3-13
3.11 Intercom Operation 3-13
3.12 VOX & Speaker Operation 3-15
3.13 Menus 3-15
3.13.1 Intercom Menu 3-15
3.13.2 Pilots Menu 3-17
3.14 Warning and Failure Indications 3-18

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Page VI DV 14307.03 Issue 1 09/2013
List of Abbreviations
AC ..... Alternating Current
AF ..... Audio Frequency
AR ..... Airborne Radio
ATT .... Attenuation
AUX .... Auxiliary
AWG .... American Wire Gauge
BNC .... Bayonet Neill Concelman
CBIT ... Continuous Built-In Test
CFG .... Configuration
CH ..... Channel
CM ..... Chassis Module
COM .... Communication
DC ..... Direct Current
EASA ... European Aviation Safety Agency
EMI .... Electro Magnetic Interference
ETSO ... European Transmission System Operators
GND .... Ground (Aircraft Ground)
GPS .... Global Positioning System
HMI .... Human Machinery Interface
HIRF ... High Intensity Radiated Fields
IC ..... Intercom
I&O .... Installation & Operation
LCD .... Liquid Crystal Display
MFD .... Multi-Function Display
M&R .... Maintenance & Repair
N/A .... Not Applicable
NAV .... Navigation
PBIT ... Power-On Built In Test
PTT .... Push To Talk
PWR .... Power
RCU .... Remote control unit

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DV 14307.03 Issue 1 09/2013 Page VII
RSSI ... Received Signal Strings Indication
RT ..... Remote Transceiver
RX ..... Receive
SQL .... Squelch
SPKR ... Speaker (Loudspeaker)
SRC .... Source
SW ..... Software
TSO .... Technical Standard Order
TX ..... Transmit
VOX .... Voice Operated IC Threshold
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
kHz .... Kilohertz
MHz .... Megahertz
s ..... Second
dBm .... Power ratio in decibels
dB ..... Decibel
Ohm(Ω). Resistor
kg ..... Kilogram
t ...... Tons
°C ..... Degree Celsius
mm ..... Millimeter
cm ..... Centimeter

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Page VIII DV 14307.03 Issue 1 09/2013
Blank

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DV 14307.03 Issue 1 09/2013 Page 1-1
Section 1 GENERAL DESCRIPTION
1.1 Introduction
This manual describes the operation and installation of the
RCU/RT/AR6201 VHF Transceiver Family equipment. 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(s). 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.
For simplification of this document the short version “620X” for VHF
transceivers and “RCU6201” for the remote controllers will be used
instead of the full part number identification.
The manuals DV 14307.03 I&O (“Installation and Operation”) and DV
14307.04 M&R (“Maintenance and Repair”) contain the following sections:
Section DV 14307.03
I&O
DV 14307.04
M&R
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
1.2 Purpose of Equipment
The 620X transceivers enable voice communication between aircrafts or
between aircraft and ground using the very high frequency band between
118.000 to 136.9916 MHz respectively 136.9750 with a selectable channel
spacing of 25 kHz respectively 8.33 kHz. The wide scope of accessories
also allows usage of the 620X VHF transceivers in ground-based
applications.

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The 620X-(XXX) Transceiver Family is dedicated to applications where low
power consumption is required. They are capable to operate from standard
14 VDC and 28 VDC installations and from 12 VDC or 24 VDC batteries.
Ultra low power consumption with extremely wide DC supply voltage range
as well as compact and lightweight design allows application for gliders
and leisure aircraft up to 2000 kg and balloons.
Built-in 4-seat configurable intercom, transmitter output power up to
10W and option for connection of two controllers in tandem
configurations extends the flexibility of 620X VHF transceivers.
The 620X transceivers also provide additional options such as:
•Intercom functionality for voice communication between aircraft crew
and passengers
•Squelch functionality that automatically mutes receiver audio signal
until clear signal is received to avoid unwanted audio noise
•Scan functionality for simultaneous monitoring of two VHF channels
(receive mode)
•AUX audio input for connection of additional audio devices like
navigation receiver, warning tone generator or MP3 music player.
•VHF channel database for easy access to predefined frequency channels
•Tandem functionality for synchronized operation of two controllers
1.3 General Notes
In this document the word “frequency” is also used in the sense of
“channel name”, as defined in EUROCAE, ED-23B: chapter 1.3.2.
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.
1.4 Variants Overview
Within the part number, the meaning of “- (XXX)” is:
(0XX) indicates 8.33/25 kHz channel spacing capability
(1XX) indicates only 25 kHz channel spacing capability
(X1X) indicates transmit power 10W at 28V
(X2X) indicates transmit power 6W at 12V
(XX2) indicates white illumination color on a black panel
AR6201 Single Block Transceiver (refer to Figure 1-1)
Part Number
Article No
8.33kHz Mode
Transmit PWR
AR6201-[phone]-910 yes 10W at 28V
AR6201-(112) 0631.434-910 no 10W at 28V

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DV 14307.03 Issue 1 09/2013 Page 1-3
Part Number
Article No
8.33kHz Mode
Transmit PWR
AR6201-[phone]-910 yes 6W at 12V
AR6201-(122) 0636.355-910 no 6W at 12V
RT6201 Remote Transceiver (refer to Figure 1-2)
Part Number
Article No
8.33kHz Mode
Transmit PWR
RT6201-[phone]-910 yes 10W at 28V
RT6201-[phone]-910 yes 6W at 12V
RT6201–(110) 0638.609-910 yes 10W at 28V
RT6201-(120) 0638.617-910 yes 6W at 12V
RCU6201 Remote Control Unit (refer to Figure 1-3)
Part Number
Article No
8.33kHz Mode
Transmit PWR
RCU6201-[phone]-910 yes N/A
RCU6201-(112) 0631.485-910 no N/A
AR6203 Single Block Transceiver (refer to Figure 1-4)
Part Number
Article No
8.33kHz Mode
Transmit PWR
AR6203-[phone]-910 yes 10W at 28V
AR6203-(112) 0631.566-910 no 10W at 28V
AR6203-[phone]-910 yes 6W at 12V
AR6203-(122) 0636.398-910 no 6W at 12V
1.5 Short Description
For Single Configuration the Following Combinations apply:
•AR6201 or AR6203 Single Block Transceiver
•RT6201 Remote VHF Transceiver with controller RCU6201
For Tandem Configuration the Following Combinations apply:
•AR6201 or AR6203 Single Block Transceiver with additional controller
RCU6201
•RT6201 Remote VHF Transceiver with controller RCU6201 and additional
second controller RCU6201
In tandem configuration two controllers and one transceiver are
connected. Tandem configuration is useful for training purposes where

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Page 1-4 DV 14307.03 Issue 1 09/2013
pilot and student have their own controller with full-synchronized views
or as separate controllers for pilot and co-pilot.
1.5.1 AR6201 Single Block Transceiver
The AR6201 Single Block Transceiver is a compact and lightweight unit
designed for operation in a cockpit environment for both general
aviation aircraft and helicopters. The dimensions correspond to the
standard instrument diameter of 58 mm (2 ¼ inch). All controls and
indicators are located on the front panel.
The equipment connectors and the antenna socket are located at the rear
of the units.
The AR6201 should be mounted by means of four screws (rear panel
installation).
Figure 1-1: AR6201 Single Block Transceiver; 58 mm (2 ¼ inch)
standard instrument cut-out
1.5.2 RT6201 Remote Transceiver
The RT6201 Remote Transceiver is a compact and lightweight single block
unit in rectangular shape that contains a VHF transceiver. The
dimensions correspond to the standard instrument diameter of 58 mm (2 ¼
inch).
The RT6201 Remote Transceiver can be controlled via its dedicated
controller RCU6201 or by a third party controller via MFD (BECKER
proprietary protocol required).

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DV 14307.03 Issue 1 09/2013 Page 1-5
Figure 1-2: RT6201 Remote Single Block VHF transceiver,
back panel installation
The RT6201 Remote Transceiver is installed by means of the attached
mounting provisions and four screws (back panel installation).
1.5.3 RCU6201 Remote Control Unit
The RCU6201 Remote Control Unit is a compact and lightweight unit. The
dimensions correspond to the standard instrument diameter of 58 mm (2 ¼
inch).
All controls and indicators are located on the front panel. The
equipment connectors are located at the rear of the units.
The controller RCU6201 should be mounted with four screws (rear panel
installation).
Figure 1-3: RCU6201 Remote Control Unit; 58 mm (2 ¼ inch)
standard instrument cut-out

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1.5.4 AR6203 Single Block Transceiver
The AR6203 Single Block Transceiver is designed as a single block unit.
AR6203 is designed for operation in a cockpit environment for both
general aviation aircraft and helicopters. The dimensions correspond to
the state-of-the-art 160mm (6.3 “) panel mounted design.
Figure 1-4: AR6203 Single Block Transceiver
All control elements are located on the front panel of the unit. For
connection to the aircraft inter-wiring two 25-pin unit connectors and
BNC antenna socket are located at the rear of the unit.
The AR6203 should be mounted with the designated mounting kit MK6403-1
(refer to chapter 1.10). Six holes on both sides of the mounting kit
frame enable the device to be mounted in the aircraft cockpit.
1.6 Features Overview
Frequency Indication
A liquid crystal display (LCD) provides the frequency indication. The
required operating frequency is set with the rotary knob. The relation
between the real operating frequency and the displayed frequency is
according to standards (ED-23B, chapter 1.3.2). For an overview, refer
to the table below.

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Operating
Frequency
(MHz)
Channel
Spacing
(kHz)
Displayed Frequency
8.33 + 25 kHz
mixed Mode
25 kHz only
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
Audio Outputs
The 620X VHF Transceiver includes four fully configurable outputs:
•Headphone 1 output, rated output power is 300 mW into 75 Ohm.
•Headphone 2 output, rated output power is 200 mW into 75 Ohm.
•Speaker output, rated output power is 4 W into 4 Ohm.
•LINE-OUT output intended for ground station use only
Note: Headphone 2 and speaker output cannot be active at the same time
Mike Inputs
The VHF transceiver has an input for dynamic microphone (DYN_MIKE) and
an input for standard microphone (STD_MIKE).
The 620X 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.
AF Auxiliary Input
The AF auxiliary provides the interface to connect an external audio
source (e.g. NAV, music-player) to the transceiver. Interconnection of
multiple external audio sources on this particular port requires

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additional external decupling/isolation resistors. The external audio is
audible only when the transceiver is in 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 noise level and is adjustable in the pilot setup.
Memory Channels
The memory function allows storage of up to 99+9 frequencies. This
memory may contain up to 99 frequencies stored manually or programmed
from PC that can be labeled with VHF channel numbers or assigned text
label. Additionally the last recently used (active) 9 frequencies are
stored automatically as “LAST” channels. A user defined text label can
also be assigned for each stored frequency.
Intercom Operation
Aircraft internal communication via connected headsets is provided by
the built-in intercom circuit. The 620X has two intercom circuits:
“Front row” and “Back row”. A maximum of four headsets can be connected
(for example pilot & copilot on first circuit and two passengers on
second circuit).
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.
Tandem operation
Tandem mode enables operation of two controllers simultaneously. The
controllers are synchronized, so that both display the same information
Illumination
The illumination of LCD and push buttons can be controlled either
directly from the front panel via the pilots menu or externally via the
dimming input lines. If the external dimming is selected, the