Becker AR6201-000, AR6201-002, AR6201-100, AR6201-102 Installation And Operation Manual

Installation

Operation

Manual DV 14300.03

Issue 5 July 2013

Becker Flugfunkwerk GmbH ● Baden Airpark ● 77836 Rheinmünster ● Germany

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

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

VHF-Transceiver

AR6201-(X0X)

Software Versions:
SCI1050S305 Version 3.0 5
SCI1051S305 Version 1.4 9

and upwards

FIRST ISSUE AND CHANGES

Issue 1 May 2010

Issue 2 October 2010

Issue 3 March 2011

Issue 4 May 2011

Issue 5 July 2013

LIST OF EFFECTIVE PAGES

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

Cover Page

7/2013

I … VI 7/2013

1-1 … 1-10 7/2013

2-1 … 2-42 7/2013

3-1 … 3-19 7/2013

DV 14300.03 / Article Number 0617.857-071

© 2013 by Becker Flugfunkwerk GmbH / All rights reserved

AR6201-(X0X)

DV 14300.03/.04 Issue 5 5/2013 Page I

Table of Contents

Section 1 GENERAL DESCRIPTION Page

1.1 Introduction 1-1

1.2 Purpose of Equipment 1-1

1.3 General Notes 1-1

1.4 Short Description 1-1

1.5 Variants Survey 1-4

1.6 Technical Data 1-5

1.6.1 Power Supply Data 1-5

1.6.2 General Data 1-5

1.6.3 Dimensions & Weight 1-5

1.6.4 Receiver Data 1-5

1.6.5 Transmitter Data 1-6

1.6.6 Emergency Operation 1-6

1.6.7 Software 1-6

1.6.8 Complex Hardware 1-6

1.6.9 Regulatory Compliance 1-7

1.7 Environmental Qualification 1-7

1.8 Accessories 1-9

AR6201-(X0X)

Page II DV 14300.03/.04 Issue 1 05/1013

Section 2 Installation Page

2.1 Limitations 2-1

2.2 Unpacking the Equipment and

Preparation for Installation 2-1

2.3 Mechanical Installation 2-1

2.4 Electrical Interface 2-2

2.4.1 Connectors and Pin Assignment 2-2

2.4.2 Inputs / Outputs Detailed Description 2-5

2.5 Installation Wiring 2-9

2.5.1 Typical Wiring for Single Seater Glider 2-10

2.5.2 Typical Wiring for Single Seater Glider

(5-pol DIN Jack) 2-11

2.5.3 Typical Wiring for

Twin Seater Motor Glider 2-12

2.5.4 Typical Wiring for

Standard Headsets in use 2-13

2.5.5 Typical Wiring for Aircrafts with

Intercom System (unbalanced) 2-14

2.5.6 Typical Wiring for Aircrafts with

Intercom System (balanced) 2-15

2.5.7 Typical Wiring for Twin Seater Aircrafts,

Tandem (additional R

adio Control Unit) 2-16

2.6 Antenna Installation 2-17

2.7 Location of internal Circuit Breaker 2-17

2.8 Installation Setup 2-18

2.8.1 Entering Installation Setup 2-18

2.8.2 Page Up / Page Down

in the Installation Setup 2-18

2.8.3 Storage of Setup Data 2-18

2.8.4 Terminate Installation Setup 2-18

AR6201-(X0X)

DV 14300.03/.04 Issue 5 5/2013 Page III

2.8.5 Installation Setup Page

Data Description 2-19

2.9 Typical Settings

in the INSTALLATION SETUP 2-30

2.9.1 Single Seater Glider 2-30

2.9.2 Twin Seater Motor Glider 2-31

2.9.3 GA aircraft using Standard Microphones 2-32

2.9.4 Aircraft with Intercom System 2-33

2.9.5 Twin Seater Aircraft 2-33

2.10 Retrofitting an AR4201

with an AR6201-(X0X) 2-34

2.10.1 Pin Compatibility 2-34

2.10.2 Dynamic Microphone Input 2-36

2.10.3 Temperature Sensor 2-36

2.10.4 RS-232 Interface 2-36

2.10.5 AFCU/AGC/AFWB 2-36

2.10.6 PWR_EVAL 2-37

2.11 Post Installation Tests 2-37

2.11.1 Mechanical Installation and Wiring Check 2-37

2.11.2 Power Supply 2-37

2.11.3 Receiver / Transmitter Operation 2-37

2.11.4 Antenna Check 2-37

2.11.5 Interference Check 2-37

2.11.6 Flight Test Check 2-40

2.12 Trouble Shooting 2-40

2.13 Continued Airworthiness 2-41

AR6201-(X0X)

Page IV DV 14300.03/.04 Issue 1 05/1013

Section 3 OPERATION Page

3.1 Safety Instructions 3-1

3.2 Controls and Indicators 3-2

3.2.1 Controls 3-3

3.2.2 Symbols shown on the Display 3-4

3.3 Start–Up 3-4

3.4 Receive and Transmission Operation 3-5

3.4.1 Receive Mode 3-5

3.4.2 Transmission Operation 3-5

3.5 Frequency Selection Modes 3-6

3.5.1 Standard Mode 3-7

3.5.2 Direct Tune Mode 3-7

3.5.3 Channel Mode 3-8

3.5.4 Scan Function 3-10

3.6 Squelch 3-11

3.7 RX Field strength indication 3-11

3.8 Channel Spacing Mode 3-11

3.9 Storage Function 3-12

3.9.1 Modification of User Channels

Database and Labels Database 3-12

3.9.2 Automatic Storage Function 3-13

3.10 Auxiliary Audio Input 3-14

3.11 Intercom Operation 3-14

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

AR6201-(X0X)

DV 14300.03/.04 Issue 5 5/2013 Page V

List of Abbreviations

AF Audio Frequency

ATT Attenuation

CBIT Continuous Built In Test

CFG Configuration

EASA European Aviation Safety Agency

EMI Electro Magnetic Interference

ETSO European Transmission System Operators

GPS Global Positioning System

HMI Human Machinery Interface

HIRF High Intensity Radiated Fields

IC Intercom

I&O Installation & Operation

LCD Liquid Crystal Display

M&R Maintenance & Repair

PBIT Power-On Built In Test

PTT Push TO Talk

PWR Power

RX Receive

SQL Squelch

SPKR Speaker (Loudspeaker)

SRC Source

TSO Transmission System Operator

TX Transmit

VOX Voice Operated IC Threshold

VHF Very High Frequency

VSWR Voltage Standing Wave Ratio

AR6201-(X0X)

Page VI DV 14300.03/.04 Issue 1 05/1013

BLANK

AR6201-(X0X)

DV 14300.03/.04 Issue 5 5/2013 Page 1-1

Section 1. GENERAL DESCRIPTION

1.1 Introduction

This manual describes the VHF transceiver AR6201-(X0X). The manuals DV

14300.03

I&O (“Installation and Operation”) and DV 14300.04 M&R

(“M

aintenance and Repair”) contain the following sections.

Section

DV 14300.03

I&O

DV 14300.04

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 AR6201-(X0X) VHF transceiver enables voice communication in the very
high frequency band between 118.000 MHz and 136.9916 MHz with a
selectable channel spacing of 25 kHz or 8.33 kHz.
The AR6201-(10X) VHF transceiver enables voice communication in the very
high frequency band between 118.000 MHz and 136.9750 MHz with a
selectable channel spacing of 25 kHz only.

1.3 General Notes

The word “frequency”, also used in this document in the sense of
“channel name”, as defined in EUROCAE, ED-23B: chapter 1.3.2.
The word “memory channel” or “channel” used in this document means a
memory place identified by a channel number. On that memory place, a
frequency may be stored for later use.

1.4 Short Description

The AR6201-(X0X) is a single block transceiver ideal to be fitted in all
type of general aviation aircraft and helicopters.
The VHF transceiver is a compact and lightweight single block unit. The
dimensions correspond to the standard instrument diameter of 58 mm (2 ¼
inch). Mounting is by means of four screws (back panel installation).

AR6201-(X0X)

Page 1-2 DV 14300.03/.04 Issue 5 5/2013

All controls and indicators are located on the front panel. The
equipment connectors and the antenna socket are located at the rear of
the unit. On the right-hand side is a Circuit Breaker located.

Frequency Indication

By means of a liquid crystal display (LCD) the frequency indication is
provided. 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.

Operating

Frequency (MHz)

Channel Spacing

(kHz)

Displayed

Frequency

in 8.33+25 kHz

Mixed Mode

Displayed

Frequency

in 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

Audio Outputs

The transceiver includes two audio outputs: headphone and speaker. The
headphone rated output power is 300 mW into 150 Ohm. The rated output
power from the speaker output is 4 W into 4 Ohm.

Mike Inputs

The VHF transceiver has an input for dynamic microphone (DYN_MIKE) and
an input for standard microphone (STD_MIKE). Each input is able to
operate with single microphone or with 2 microphones of the same type
connected in parallel.

AF Auxiliary Input

The AF auxiliary input enables to connect an external audio source (NAV,
music-player …) to the transceiver. The external audio is audible only
when the transceiver is in Receive Mode.

AR6201-(X0X)

DV 14300.03/.04 Issue 5 5/2013 Page 1-3

Sidetone

The Sidetone is available on the headphone output during transmission.
The Sidetone Volume depends simultaneous on the Intercom Volume setting.

Squelch Operation

A Squelch (muting) circuit suppresses received signals if the signal
quality is poor. There are two kinds of Squelch methods implemented,
Carrier Squelch and Noise Squelch. The carrier squelch rests upon the
signal strength of the received signal; the noise squelch rests upon the
detected noise level and is adjustable in the pilot’s setup menu.

Memory Channels

The VHF transceiver also contains a channel memory function for
automatically/manually channel memory storage of up to 99+9 frequencies.
The last 9 used (active) frequencies are always stored automatically.
The manual storage of up to 99 different frequencies is in addition
possible. It is also possible to assign for each stored frequency a user
defined text label.

Intercom Operation

Aircraft internal communication via connected headsets is provided by
the built in intercom circuit. The Intercom operation may be
automatically via VOX (adjustable) or externally via the intercom switch
triggered. The Setting of VOX-threshold and Intercom Volume is
accessible for the pilot by the Intercom Menu.

Scan Function

In “Scan Function” a dual watch functionality is provided. In case of a
signal is received on both (active/preset) frequencies simultaneously
the signal of the active frequency will become audible with priority at
any time.

Illumination

The illumination of the LCD and the push buttons can be controlled
either directly from the front panel via the pilot’s menu or externally
via the dimming input lines. In case of external dimming is selected the
illumination curve (brightness to voltage relation) can be adjusted in
the Installation Setup.

LOW BATT Indication

The VHF transceiver also contains a monitoring stage for the power
supply voltage. If the supply voltage drops below the adjustable
threshold, the display indicates the message “LOW BATT”.

Emergency Operation

The VHF transceiver is able to operate in emergency operation (9.0 V)
with some reduced performance.

Built In Tests

After power-up, the unit performs a power-up built in test (PBIT).
During PBIT the transceiver displays “WAIT” and the corresponding

AR6201-(X0X)

Page 1-4 DV 14300.03/.04 Issue 5 5/2013

software versions of the control head and chassis module. The continuous
built in test (CBIT) verifies the correct function of the unit
permanently during normal operation. If a problem is detected an error
message will be displayed.

Installation Setup

Configuration of the installation parameters like mike sensitivity, mike
type selection, speaker ON/OFF and further parameters is possible via
the Installation Setup.

Service Mode

The Service Mode is a special configuration mode of the AR6201 via a
RS422 interface with a proprietary serial data communication protocol.

1.5 Variants Survey

Part Number

Article

Number

Panel

Color

Display

Color

25 kHz

Mode

8.33+25 kHz

Mixed Mode

AR6201-[phone]-910 black green Yes Yes

AR6201-[phone]-910 black blue - white

Yes Yes

AR6201-(100) 0621.218-910 black green Yes

Not

available

AR6201-(102) 0621.226-910 black blue - white

Yes

Not

available

AR6201-(X0X)

DV 14300.03/.04 Issue 5 5/2013 Page 1-5

1.6 Technical Data

1.6.1 Power Supply Data

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

Abnormal supply voltage range ... 10.25 … 32.2 VDC

Emergency operation ............. 9.0 VDC (reduced performance,

ref.chapter1.6.6)

Power consumption:

Power “OFF” state ............. ≈ 1.5 mA @ 12 VDC

< 10 mA @ 28 VDC

Receive Mode .................. ≤ 140 mA @ 14 VDC, panel backlight “OFF”

< 90 mA @ 28 VDC, panel backlight “OFF”

(< 85 mA typ.)

Transmit Mode ................. ≤ 2 A @ 14 VDC; 70% modulation, VSWR=1:1

≤ 4 A @ 14 VDC; 70% modulation, VSWR=3:1

≤ 1 A @ 28 VDC; 70% modulation, VSWR=1:1

≤ 1 A @ 28 VDC; 70% modulation, VSWR=3:1

Circuit Breaker (internal) ...... 5 A (resettable)

Dimming control ................. 14 VDC or 28 VDC

1.6.2 General Data

Frequency range ................. 118.000 MHz to 136.975 MHz (25 kHz Mode)

Frequency range ................. 118.000 MHz to 136.9916 MHz

(8.33 + 25 kHz Mixed Mode)

Channel spacing ................. 25 kHz or 8.33 kHz

Number of channels .............. 760 (25 kHz Mode)

2280 + 760 (8.33 + 25kHz Mode)

Storage temperature range ....... -55°C to +85°C

Operating temperature range ..... -20°C to +55°C / short-time +70°C

Operating altitude .............. 35.000 ft

1.6.3 Dimensions & Weight

Front panel ..................... 61.2 mm x 61.2 mm

Depth of unit ................... 211.4 mm

(front plate to the end of Antenna

connector)

Mounting-hole (instrument panel) standard 58 mm diameter (2

1/4

inch)

Material of Case ................ ALMg

Surface treatment ............... control-head coated with black paint (matt)

Weight .......................... 850g

1.6.4 Receiver Data

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

Effective bandwidth ............. ≥ ± 2.78 kHz at the 6 dB points

≥ ± 7.37 kHz at the 60 dB points

AR6201-(X0X)

Page 1-6 DV 14300.03/.04 Issue 5 5/2013

1.6.5 Transmitter Data

Output power .................... ≥ 6 W into 50 Ω @ 12 VDC

................................ (with and without modulation)

Frequency tolerance ............. ≤ 5 ppm

Duty cycle ...................... 1 minute (TX):4 minutes (RX)

Type of modulation .............. A3E (amplitude modulation)

Modulation capability ........... ≥ 70%

Distortion at 70% modulation .... ≤ 15%

Modulation bandwidth ............ ≤ 6 dB, 350 Hz to 2500 Hz

Dynamic microphone ............. 1 … 20 mV compressor starting point

adjustable, balance input, 140 Ohm,

input range up to 20 dB above compressor

starting point.

Standard microphone ............. 25 … 1000 mV compressor starting

(with compressor) point, unbalanced input,

110 Ω, input range up to 20 dB above

compressor starting point.

FM deviation with modulation .... ≤ 3 kHz

Sidetone ........................ adjustable

Automatic shutdown of TX mode ... after 120 seconds of permanent TX

(stuck PTT)

1.6.6 Emergency Operation

TX output power ................. ≥ 2 W into 50 Ω (with modulation) @ 9 VDC

TX modulation depth ............. ≥ 50% @ 9 VDC

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

6 dB @ 9VDC

Panel & Display backlight ....... switched “OFF”

Speaker output .................. switched “OFF”

Headphone output ................ operating

CAUTION: For power-supply voltages below 10 V the speaker output of the

transceiver will automatically be switched “OFF”, without
notification for the pilot!
Depending on settings in Installation Setup “LOW BATT” may be
indicated if supply voltage drops below a predefined threshold.
If the threshold adjusted within the range 10.3 … 10.5V is
reached the “LOW BATTERY” warning indicates the user, that he
should connect his headset because the speaker may be switched
“OFF” soon).

1.6.7 Software

The software is as Level D in accordance with EUROCAE/RTCA document
ED12B/DO-178B classified.

1.6.8 Complex Hardware

Complex hardware is not used.

AR6201-(X0X)

DV 14300.03/.04 Issue 5 5/2013 Page 1-7

1.6.9 Regulatory Compliance

Part Number

Article

Number

EASA Approval TSO Approval FCC Approval

AR6201-(000) 0610.321-910

EASA.210.1249

ETSO-2C37e

Class: D, E

ETSO-2C38e

Class: 4, 6

TSO-C169a

Class: D, E,

4, 6

B54AR6201

AR6201-(002) 0614.203-910

AR6201-(100) 0621.218-910

EASA.210.1249

ETSO-2C37e

Class: D

ETSO-2C38e

Class: 4

TSO-C169a

Class: D, 4

B54AR6201

AR6201-(102) 0621.226-910

Note: Unauthorized changes or modifications to the AR6201-(X0X) may

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

1.7 Environmental Qualification

Under environmental test condition in accordance with the procedures set
forth in EUROCAE/RTCA Document ED-14E/DO-160E the following performance
has been demonstrated.

Condition

Section

Cat.

Description

Temperature and Altitude 4.0 C4

Ground Survival Low

Temperature

4.5.1 -55 deg C

Short-Time Operating Low

Temperature

-20 deg C

Operating Low Temperature -20 deg C

High Ground Survival

Temperature

4.5.2 +85 deg C

High Short-Time Operating

Temp.

4.5.3 +70 deg C

Operating High Temp. 4.5.4 +55 deg C

In-flight Loss of Cooling 4.5.5 X

No forced cooling required

Altitude 4.6.1 C4 35,000 ft

Decompression 4.6.2

Overpressure 4.6.3

Temperature Variation 5.0 B 5°C per minute

AR6201-(X0X)

Page 1-8 DV 14300.03/.04 Issue 5 5/2013

Condition

Section

Cat.

Description

Humidity 6.0 A Standard

Shock and Crash Safety 7.0 B

Fixed-

wing and Helicopter,

standard

Vibration 8.0

S

U

Curve M for Fixed-wing

Aircraft

Curve G for Helicopters

Explosion-proofness 9.0 X N/A

Water-proofness 10.0 X Condensing water

Fluids Susceptibility 11.0 X N/A

Sand and Dust 12.0 X N/A

Fungus Resistance 13.0 X N/A

Salt Spray 14.0 X N/A

Magnetic Effect 15.0 Z Less than 0.3m

Power Input 16.0 B

DC installations with

battery of significant

capacity

Voltage Spike 17.0 A

High degree of protection

against voltage spikes

Audio Freq. Conducted

Susceptibility

18.0 B

DC installations with

battery of significant

capacity

Induced Signal

Susceptibility

19.0 AC

Primary power DC or AC,

400Hz

Radio Frequency

Susceptibility

20.0 SW

Interim High Intensity

Radiated Fields

Emission of Radio Frequency

Energy

21.0 B

Equipment where

interference should be

controlled to a tolerable

level

Lightning Induced Transients

Susceptibility

22.0 A1E3X

Pin test waveform A, level

1

Cable bundle test waveform

E,

level 3

Lightning Direct Effects 23.0 X N/A

Icing 24.0 X N/A

Electrostatic Discharge 25.0 A

Equipment operated in an

aerospace environment

Fire, Flammability 26.0 X N/A

AR6201-(X0X)

DV 14300.03/.04 Issue 5 5/2013 Page 1-9

1.8 Accessories

Connector Kit CK4201-S (soldering version) Article-No.: 0879.304-954

consisting of:

25-pol. cable connector, soldering F Article no. 0725.021-277

Connector housing Article no. 0775.479-277

Antenna plug Article no. 0725.706-277

Label “COMM” Article no. 0711.111-258

Coding pin Article no. 0782.211-277

Connector Kit CK4201-C (crimp version) Article-No.: 0514.901-954

consisting of:

25-pol. cable connector, crimp F Article no. 0472.921-277

Connector housing Article no. 0775.479-277

Antenna plug Article no. 0725.706-277

Label “COMM” Article no. 0711.111-258

Coding pin Article no. 0782.211-277

Connector Kit CK6200-S (soldering version) Article-No.: 0617.903-954

consisting of:

25-pol. cable connector, soldering F Article no. 0725.021-277

25-pol. cable connector, soldering M Article no. 0726.331.277

2 X Connector housing Article no. 0775.479-277

Antenna plug Article no. 0725.706-277

Label “COMM” Article no. 0711.111-258

Coding pin Article no. 0782.211-277

AR6201-(X0X)

Page 1-10 DV 14300.03/.04 Issue 5 5/2013

Connector Kit CK6200-C (crimp version) Article-No.: 0617.891-954

consisting of:

25-pol. cable connector, crimp F Article no. 0472.921-277

25-pol. cable connector, crimp M Article no. 0891.551-277

2 X Connector housing Article no. 0775.479-277

Antenna plug Article no. 0725.706-277

Label “COMM” Article no. 0711.111-258

Coding pin Article no. 0782.211-277

Documentation

Operating instructions Article no. 0618.764-071

Manual Installation and Operation Article no. 0617.857-071

Manual Maintenance and Repair Article no. 0617.865-071

AR6201-(X0X)

DV 14300.03/.04 Issue 5 5/2013 Page 2-1

Section 2. INSTALLATION

The installation of the VHF transceiver depends on the type of aircraft
and its equipment. Therefore, only general information is given in this
section.

2.1 Limitations

The installation of the AR6201-(X0X), designed as a single block unit
for use in cockpit environment of general aviation aircrafts including
helicopters, can be performed under consideration of the following
limitations:

• Installations have to be in accordance with appropriate EASA or FAA

approved guidelines.

• The AR6201-(X0X) must be connected to a VHF antenna in order to

satisfy FAA TSO-C169a.

• The conditions and tests for ETSO/TSO approval of this article are

minimum performance standards. Those installing this article, on or
in a specific type or class of an aircraft, must determine that the
aircraft installation conditions are within the ETSO/TSO standards.

Note: Changes or modifications made to this equipment not expressly

approved in written form by Becker Flugfunkwerk may void the
authorization to operate this equipment.

2.2 Unpacking the Equipment and Preparation for Installation

General

Visually inspect the package for signs of transport damage. Carefully
unpack all items and check for completeness.

Additional Required Equipment

The AR6201-(X0X) is intended for use with standard aviation accessories.
The following equipment is required for installation:

• VHF COMM Antenna with coaxial 50 Ω impedance cable and BNC connector

• Microphone

• Headphone and/or speaker

2.3 Mechanical Installation

The AR6201-(X0X) is designed to be mounted in the aircraft instrument
panel within easy view and reach of pilot/operator. The AR6201-(X0X) is
designed for back-panel mounting by means of four screws, which are
already attached to the AR6201 front. The circular cut out and the
mounting holes have to be prepared in accordance with Figure 2-3. The
location of the AR6201-(X0X) shall be at least 30 cm away from the
aircraft magnetic compass, to avoid any interference to the magnetic
compass by the transceiver. For typical installations, there is no need
for a forced cooling of the AR6201-(X0X). Leave clearance of minimum 5
mm between the AR6201-(X0X) and other avionics to allow air circulation.
Figure 2-1, Figure 2-2 and Figure 2-3 show the unit dimensions.

AR6201-(X0X)

Page 2-2 DV 14300.03/.04 Issue 5 5/2013

Figure 2-1 VHF transceiver side view

Figure 2-2 Mounting dimensions VHF

transceiver

Figure 2-3 Drilling jig for back-panel

mounting

2.4 Electrical Interface

2.4.1 Connectors and Pin Assignment

Figure 2-4 Connectors on rear plate

AR6201-(X0X)

DV 14300.03/.04 Issue 5 5/2013 Page 2-3

Antenna Connector (Position 1)

The antenna connector (Figure 2-4, Position 1) is a BNC type.

Grounding Bolt (Position 2)

The transceiver has a M4 threaded grounding bolt (Figure 2-4, Position

2) allowing a low impedance grounding of the unit. Low impedance
grounding is essential to avoid damage or malfunction in case of
indirect lightning, EMI and HIRF effects.

P1 Connector (System Interfaces)

The P1 connector (Figure 2-4, Position 3) is a D-SUB male type with 25
pins and slide-in fastener.

Pin No. Pin Name Direction Function

P1-1 SPK_HI OUT Speaker output signal (HI)

P1-2 HDPH_A OUT Balanced output for headphone(s)

P1-3 HDPH_B OUT Balanced output for headphone(s)

P1-4 AF_AUX_IN_HI IN Auxiliary audio input (HI)

P1-5 MIKE_DYN_HI IN Balanced input for dynamic

microphone(s)

P1-6 MIKE_DYN_LO IN Balanced input for dynamic

microphone(s)

P1-7 IC IN Intercom key input;

LO active - closed contact to GND

P1-8 MIKE_STD_LO - Standard Microphone LO

(ground/return)

P1-9 NC not connected

P1-10 ILL_LO IN Illumination LO input

P1-11 P_SUPP IN Power supply ( + )

P1-12 P_SUPP IN Power supply ( + )

P1-13 P_SUPP_GND - Power supply (return)

P1-14 SPK_LO - Speaker ground (return)

P1-15 LINE_OUT OUT High impedance audio output

P1-16 AGC_OUT OUT Receiver AGC output

P1-17 /PTT IN Press To Talk key input

LO active - closed contact to GND

P1-18 MIKE_STD_HI IN Standard Microphone (HI)

P1-19 CPIN - Pin removed to allow mechanical

coding of the harness connector.

P1-20 NC - not connected

P1-21 AF_AUX_IN_LO - Auxiliary audio input LO

(ground/return)

P1-22 NC - -

AR6201-(X0X)

Page 2-4 DV 14300.03/.04 Issue 5 5/2013

Pin No. Pin Name Direction Function

P1-23 ILL_HI IN Illumination (HI)

P1-24 /PWR_EVAL - Power on monitor output

P1-25 P_SUPP_GND - Power supply (return)

J1 Connector (Serial Interfaces and Discrete I/Os)

The J1 connector is a D_SUB female connector with 25 pins and slide-in

fastener.

Pin No. AR6201 Pin Name Direction Function

J1-1 CPIN - Reserved Coding PIN

J1-2 TX2+ IN Interface 2 OUT+

J1-3 RX2+ IN Interface 2 IN+

J1-4 /SQL_EVAL OUT Squelch monitor output

LO active - closed contact to GND

J1-5 /CSDB_EXT IN Extended CSDB protocol enabling

LO active - closed contact to GND

J1-6 SHIELD_1 - Interface 1 SHIELD

J1-7 TX1+ OUT Interface 1 OUT+

J1-8 RX1+ IN Interface 1 IN+

J1-9 TX2- OUT Interface 2 OUT-

J1-10 RX2- IN Interface 2 IN-

J1-11 SHIELD_2 - Interface 2 SHIELD

J1-12 /EXT_SO IN External ”Exchange” key

Falling edge activates frequency
exchange

J1-13 /SRV_EN IN Service enable pin

LO active - closed contact to GND

J1-14 TX1- OUT Interface 1 OUT-

J1-15 RX1- IN Interface 1 IN-

J1-16 NC not connected

J1-17 NC not connected

J1-18 NC not connected

J1-19 NC not connected

J1-20 (/GPI) IN General Purpose Input pin (unused, for

future purposes)

LO active - closed contact to GND

J1-21 D_GND - Discrete lines ground

J1-22 D_GND - Discrete lines ground

J1-23 D_GND - Discrete lines ground

AR6201-(X0X)

DV 14300.03/.04 Issue 5 5/2013 Page 2-5

Pin No. AR6201 Pin Name Direction Function

J1-24 /MIKE_SW IN Audio configuration selector input

J1-25 /ON IN External Power ON input

LO active - closed contact to GND

2.4.2 Inputs / Outputs Detailed Description

Microphone Connection – Carbon Microphone Standard

Pin No. AR6201 Pin Name Direction Function

P1-8 MIKE_STD_LO - Standard Microphone LO

(ground/return)

P1-18 MIKE_STD_HI AF IN / DC OUT Standard Microphone (HI)

For interfacing with standard microphone the transceiver has an
unbalanced input with an input impedance of 110 Ohm and a nominal
sensitivity of 110 mV. This sensitivity level can be adjusted in the
Installation Setup from 9 mV to 1500 mV. The power supply delivered from
pin 18 for supply of the connected microphone(s) is > 8 V DC (8.3 V
nominal) open circuit.

Note: Sensitivity range 25 mV to 1000 mV was qualified under

environmental conditions

For all popular aviation microphones the power supply is capable to
supply two microphones in parallel.

Care should be taken to combine only microphones of the same type /
impedance.

It is highly recommended to mount the jacks isolated from aircraft frame
in order to avoid ground loops.

Microphone Connection - Dynamic Microphone

Pin No. AR6201 Pin Name Direction Function

P1-5 MIKE_DYN_HI IN Balanced input for dynamic

microphone(s)

P1-6 MIKE_DYN_LO IN Balanced input for dynamic

microphone(s)

For interfacing with dynamic microphone the transceiver has a balanced
input with an impedance of 140 Ohm and a nominal sensitivity of 3.5 mV.
This sensitivity level is adjustable in the Installation Setup from 0.5
mV to 25 mV.

AR6201-(X0X)

Page 2-6 DV 14300.03/.04 Issue 5 5/2013

Note: The sensitivity range of 1 mV to 20 mV was qualified under

environmental conditions.

Two dynamic microphones in parallel may be connected (identical
technical characteristics of the microphones are preferable).
It is highly recommended to install the microphone jacks isolated from
aircraft ground in order to avoid ground loops.

Speaker Connection

Pin No. AR6201 Pin Name Direction Function

P1-1 SPK_HI OUT Speaker output (HI)

P1-14 SPK_LO - Speaker LO (ground/return)

The speaker output provides nominal 4 Watts into 4 Ohm.

CAUTION: The magnetic field of a speaker may influence the magnetic

compass.

When choosing the installation place, a distance where the

magnetic compass is not affected must be determined. After
the speaker is installed accuracy of the compass operation
must be verified.

Headphone Connection

Pin No. AR6201 Pin Name Direction Function

P1-2 HDPH_A OUT Balanced Output for headphone(s)

P1-3 HDPH_B OUT Balanced Output for headphone(s)

The headphone output is a balanced and transformer coupled output
providing nominal 300 mW into 150 Ohm.
Up to two headphones with an impedance of 300 Ohm (or higher) may be
connected in parallel.
Because the headphone output is balanced and in most installation the
use of a single shielded wire for headphone is very popular, P1-3 can be
grounded (connection to pin P1-13/P1-25). In that case, the balanced
output becomes unbalanced.
It is highly recommended to install the headphone jacks isolated from
aircraft ground in order to avoid ground loops.

AR6201-(X0X)

DV 14300.03/.04 Issue 5 5/2013 Page 2-7

Panel Illumination

Pin No. AR6201 Pin Name Direction Function

P1-10 ILL_LO IN Illumination (LO)

P1-23 ILL_HI IN Illumination (HI)

The VHF transceiver provides illumination for push-button and LCD
display. In the Installation Setup it can be configured if this
illumination is controlled via the front panel or externally via pins
P1-10/P1-23.
Connect ILL_LO (pin P1-10) to aircraft ground. Connect ILL_HI (pin P1-

23) to dimming bus.

“Auxiliary” Audio Input

Pin No. AR6201 Pin Name Direction Function

P1-4 AF_AUX_IN_HI IN Auxiliary audio (HI)

P1-21 AF_AUX_IN_LO - Auxiliary audio LO (ground/return)

The AF auxiliary input enables to connect an external audio source (NAV,
music-player …) to the transceiver. The external audio is audible only
when transceiver is in Receive Mode. The sensitivity can be adjusted in
the Installation Setup from 50 mV to 8 V. The input impedance of this
input is 600 Ohm.

/PTT (Press To Talk)

Pin No. AR6201 Pin Name Direction Function

P1-17 /PTT IN Press To Talk key input

LO active - closed contact to GND

If pin 17 is connected to ground the transceiver changes to transmission
Mode.
This input has an internal pull up and is LO active with max. 1 mA.

IC (External Intercom Key)

Pin No. AR6201 Pin Name Direction Function

P1-7 IC IN Intercom key input;

LO active - closed contact to GND

AR6201-(X0X)

Page 2-8 DV 14300.03/.04 Issue 5 5/2013

The transceiver provides with pin 7 connected to ground intercom
operation. This input has an internal pull up and is LO active at
max.1 mA. For installations where automatic intercom operation is
activated via VOX connection of this pin 7 is not necessary.
This discrete input activates intercom:

• when VOX does not work satisfactorily because of too high ambient

noise in the cockpit,

• or speaker is “enabled” in current audio in/out configuration

(Installation Setup).

/PWR_EVAL

Pin No. AR6201 Pin Name Direction Function

P1-24 /PWR_EVAL - Power on monitor output:

AR6201 “OFF” - open circuit
AR6201 on - closed circuit to GND
(max. 100 mA)

Refer Figure 2-5 for further guidance.

Note: In order to avoid damage of this output a protection diode in

parallel to the external relay shall connected.

/MIKE_SW (external Mike Switch)

Pin No. AR6201 Pin Name Direction Function

J1-24 /MIKE_SW IN Toggles between:

IN/OUT CFG 1 - open circuit
IN/OUT CFG 2 - closed circuit to GND

(configurable in Installation Setup)

The external Mike switch provides selection between the two available
audio in/out configurations.

AR6201-(X0X)

DV 14300.03/.04 Issue 5 5/2013 Page 2-9

2.5 Installation Wiring

Connection to the following equipments is required as minimum for the
AR6201-(X0X):

• Power Supply

• Antenna

• Microphone (direct or via external audio panel)

• Headphone or speaker (direct or via external audio panel)

• Push-To-Talk (PTT) switch

Note:

• Use only cables which are qualified for aircraft use (self-

extinguishing).

• AWG 20 for power supply and,

• AWG 22/24 for other cables.

• Fit shrink sleeves over the solder joints on the equipment connector.

Crimp connectors are also available from Becker.

• Protect the power supply with a 7.5 A fuse or Circuit Breaker.

The VHF transceiver is protected internally by a 5 A resettable fuse.

• Type-specific cable harnesses are also available for the aircraft

wiring (contact BECKER for detailed information).

• No RF antenna cables should be included in the cable harnesses of the

system. Avoid routing of the cable loom along with other wiring,

which carry audio power or pulses.

• Check the wiring carefully before power up the unit and check

particularly that power supply lines are not been reversed.

Typical installation wiring diagrams for different aircraft type show
the following Figure 2-5 to Figure 2-11.

AR6201-(X0X)

Page 2-10 DV 14300.03/.04 Issue 5 5/2013

2.5.1 Typical Wiring for Single Seater Glider

Power Supply

Ground

P_SUPP_GND

Frequency Exchange
(Remote Flip-Flop)
optional

P_SUPP

PTT

LINE_OUT

AF_AUX_IN_HI

NC

AR6201-( )

7

7

PL55

Earphone

3

CPIN

17

16

14

1

10

23

25

13

11

12

23

12

Auxiliary Audio Input

21

optional

24

Dynamic Mike

J3

24

PWR_EVAL

24

AF_AUX_IN_LO

3

16

17

1

14

25

23
10

12
11

13

23

12
21

24

5

2

8

18

6

9

22

15

21

19

4

20

NC

ANTENNA

NC

/EXT_SO

MIKE_STD_LO

/MIKE_SW

D_GND

2

P_SUPP

MIKE_STD_HI

MIKE_DYN_LO

P_SUPP_GND

MIKE_DYN_HI

ILL_HI

SPK_HI

ILL_LO

5

SPK_LO

6

IC

18

/PTT

AGC_OUT

8

22

9

HDPH_A

21

D_GND

Note: mount the jack for

Switched Supply

15

earphone isolated from
aircraft frame

20

4

J1

RELAXED

19

HDPH_B

ENERGIZED

AWG20

AWG20

Speaker
4 Ohm

7.5 A

Power Supply

P1

14V/28V

Figure 2-5 Typical Wiring for Single Seater Glider

AR6201-(X0X)

DV 14300.03/.04 Issue 5 5/2013 Page 2-11

2.5.2 Typical Wiring for Single Seater Glider (5-pol DIN Jack)

Figure 2-6 Typical Wiring for Single Seater Gliders (5-pol DIN Jack)

Power Supply

Ground

P_SUPP_GND

Frequency Exchange

(Remote Flip-Flop)

optional

P_SUPP

PTT

LINE_OUT

AF_AUX_IN_HI

NC

AR6201-( )

1

7

7

1

3

3

2 2 4 4 5

5

3

CPIN

17

16

14

1

10

23

25

13

11

12

23

12

Auxiliary Audio Input

21

optional

24

Dynamic Mike

J3

AF_AUX_IN_LO

3

16

17 1 14

25

23

10

12

11

13

23

12

21

24 5 2

8

18 6 9

22

15

21

19

4

20

CONNECTOR WIRING SIDE

NC

PHONE

ANTENNA

NC

/EXT_SO

MIKE_STD_LO

/MIKE_SW

D_GND

24

PWR_EVAL

24 2 P_SUPP

MIKE_STD_HI

MIKE_DYN_LO

P_SUPP_GND

MIKE_DYN_HI

ILL_HI

SPK_HI

ILL_LO

5

SPK_LO

6

IC

18

/PTT

AGC_OUT

8

22

9

7.5 A

HDPH_A

21

D_GND

15

20

4

J1

19

HDPH_B

AWG20

AWG20

Speaker

4 Ohm

Power Supply

P1

14V/28V

AR6201-(X0X)

Page 2-12 DV 14300.03/.04 Issue 5 5/2013

2.5.3 Typical Wiring for Twin Seater Motor Glider

Power Supply

Ground

Standard Mike

P_SUPP_GND

8 Ohm

Speaker

8 Ohm

Speaker

Frequency Exchange
(Remote Flip-Flop)
optional

Earphone

PL55

P_SUPP

LINE_OUT

AF_AUX_IN_HI

NC

AR6201-( )

(earphone & mike) isolated

Note: mount the jacks

from aircraft frame

7 7

PL55

Pilot
Earphone

Copilot

PTT Copilot

3

CPIN

PTT Pilot

17

Intercom On

Pilot

Intercom Off

Copilot

16

Intercom On
Intercom Off

14

Manual Intercom (optional)

1

10

23

25

13

11

12

23

12

Auxiliary Audio Input

21

optional

24

Dynamic Mike

Dynamic Mike

J3

2424

PWR_EVAL

AF_AUX_IN_LO

7.5 A

3

16

17

1

14

25

23
10

12
11

13

23

12
21

24

5

2

8

18

6

9

22

15

21

19

4

20

NC

ANTENNA

NC

/EXT_SO

MIKE_STD_LO

/MIKE_SW

D_GND

Pilot

2

P_SUPP

MIKE_STD_HI

Copilot

MIKE_DYN_LO

P_SUPP_GND

MIKE_DYN_HI

ILL_HI

Standard Mike

PL68

Pilot

SPK_HI

ILL_LO

5

PL68

Copilot

SPK_LO

6

IC

18

/PTT

AGC_OUT

8

Standard Mike

22

9

HDPH_A

21

D_GND

15
20

4

J1

19

HDPH_B

AWG20

AWG20

Speaker On

Dynamic Mike

Speaker Off

Power Supply

P1

14V/28V

Figure 2-7 Typical Wiring for Twin Seater Motor Glider

AR6201-(X0X)

DV 14300.03/.04 Issue 5 5/2013 Page 2-13

2.5.4 Typical Wiring for Standard Headsets in use

Figure 2-8 Typical Wiring for Standard Headsets in use

Power Supply

Ground

Speaker Off

P_SUPP_GND

Frequency Exchange

(Remote Flip-Flop)

Earphone

PL55

P_SUPP

LINE_OUT

AF_AUX_IN_HI

NC

AR6201-( )

Note: mount the jacks

(earphone & mike) isolated

from aircraft ground

7

7

PL55

Pilot

Earphone

Copilot

3

CPIN

PTT

17

Intercom On

16

24

PWR_EVAL

24

14

Manual Intercom (optional)

1

10

23

25

13

11

12

23

12

Auxiliary Audio Input

21

Dimming Control 14V/28V

24

J3

AF_AUX_IN_LO

3

16

17

1

14

25

23

10

12

11

13

23

12

21

24 5 2 8 18 6 9

22

15

21

19

4

20

Speaker On

NC

ANTENNA

NC

/EXT_SO

MIKE_STD_LO

/MIKE_SW

D_GND

2

P_SUPP

MIKE_STD_HI

MIKE_DYN_LO

P_SUPP_GND

MIKE_DYN_HI

ILL_HI

Standard Mike

PL68

Pilot

SPK_HI

ILL_LO

5

PL68

Copilot

SPK_LO

6

IC

18

/PTT

AGC_OUT

8

Standard Mike

22

Intercom Off

9

HDPH_A

21

D_GND

15

20

4

J1

14V/28V

19

HDPH_B

AWG20

AWG20

7.5 A

Speaker

4 Ohm

Power Supply

P1

AR6201-(X0X)

Page 2-14 DV 14300.03/.04 Issue 5 5/2013

2.5.5 Typical Wiring for Aircrafts with Intercom System (unbalanced)

Figure 2-9 Typical Wiring for Aircrafts with Intercom System (unbalanced)

Power Supply

Ground

P_SUPP_GND

P_SUPP

System

LINE_OUT

AF_AUX_IN_HI

NC

AR6201-( )

7

7

Intercom

3

CPIN

17

16

14 1 10

23

PWR_EVAL

25

24

24

13

11

12

23

7.5 A

12

21

24

J3

AF_AUX_IN_LO

3

16

17 1 14

25

23

10

12

11

13

23

12

21

24 5 2 8 18

6

9

22

15

21

19

4

20

NC

ANTENNA

NC

/EXT_SO

MIKE_STD_LO

/MIKE_SW

D_GND

2

P_SUPP

MIKE_STD_HI

MIKE_DYN_LO

P_SUPP_GND

MIKE_DYN_HI

ILL_HI

SPK_HI

ILL_LO

5

SPK_LO

6

IC

18

/PTT

AGC_OUT

8

22 9 HDPH_A

21

D_GND

15

20 4 J1

19

HDPH_B

AWG20

AWG20

Dimming Control 14V/28V

Power Supply

P1

14V/28V

AR6201-(X0X)

DV 14300.03/.04 Issue 5 5/2013 Page 2-15

2.5.6 Typical Wiring for Aircrafts with Intercom System (balanced)

Figure 2-10 Typical Wiring for Aircrafts with Intercom System (balanced)

Power Supply

Ground

P_SUPP_GND

P_SUPP

System

LINE_OUT

AF_AUX_IN_HI

NC

AR6201-( )

7

7

Intercom

3

CPIN

17

16

14

1

Note: optional grounding to Pin 13 ,

10

if grounding of shields is needed on both cable ends.

23

25

13

11

12

23

12

PWR_EVAL

24

24

21

24

J3

AF_AUX_IN_LO

3

16

17 1 14

25

23

10

12

11

13

23

12

21

24

5

2

8

18

6

9

22

15

21

19

4

20

7.5 A

NC

ANTENNA

NC

/EXT_SO

MIKE_STD_LO

/MIKE_SW

D_GND

2

P_SUPP

MIKE_STD_HI

MIKE_DYN_LO

P_SUPP_GND

MIKE_DYN_HI

ILL_HI

SPK_HI

ILL_LO

5

SPK_LO

6

IC

18

/PTT

AGC_OUT

8

22 9 HDPH_A

21

D_GND

15

20 4 J1

19

HDPH_B

AWG20

AWG20

Dimming Control 14V/28V

Power Supply

P1

14V/28V

AR6201-(X0X)

Page 2-16 DV 14300.03/.04 Issue 5 5/2013

2.5.7 Typical Wiring for Twin Seater Aircrafts, Tandem (additional Radio

Control Unit)

RX1+
RX1­TX1+
TX1-

RX0_422+
RX0_422-

TX0_422+
TX0_422-

GND
SUPP_IN

3 A

1
2
44

1
2

P1

5
9
1111

5
9

Earphone
Pilot

PL55

Manual Intercom (optional)

P ower Supply

Ground

P_SUPP_GND

Frequency Exchange
optional

(Remote Flip-Flop)

7

8
15

P_SUPP

7

PTT Pilot

LINE_OUT

8
15

14

14

AF_AUX_IN_HI

7

AR6201-(X0X)

3

7

17

CPIN

14

16

1

10

25
23

12
11

13

12
21

Auxiliary Audio Input

optional

J3

24

/PWR_EVAL

24

AF_AUX_IN_LO

3

14

16

17

23
10

1

13
25

12
11

12
21

5

2

8

18

6

21

15

20

19

4

ANTENNA

MIKE_STD_LO

/EXT_SO

D_GND

MIKE_STD1_HI

P_SUPP

2

P_SUPP_GND

MIKE_DYN_LO

ILL_LO

ILL_HI

MIKE_DYN_HI

5

SPK_HI

/IC

SPK_LO

6

AGC_OUT

18

/PTT1

20

HDPH1_A

8

15

4

21

J1

AWG20

HDPH1_B

19

AWG20

P1

P ower Supply

7.5 A

14V/28V

9 9

22

22

PL68

Standard Mike
Copilot

Note: mount the jacks
(earphone & mike) isolated
from aircraft frame

Pilot
Intercom On

Intercom Off

Intercom Off
Copilot
Intercom On

Standard Mike
Pilot

PL68

PL55

Earphone
Copilot

P TT Copilot

RCU6201-(X1X)

Figure 2-11 Typical Wiring for Twin Seater Aircrafts, Tandem

AR6201-(X0X)

DV 14300.03/.04 Issue 5 5/2013 Page 2-17

2.6 Antenna Installation

The AR6201-(X0X) requires a standard 50 Ohm vertically polarized VHF
antenna. Follow the antenna manufacturer's installation instructions. In
addition consider the following recommendations:

• The COM antenna shall be on an electrical conductive surface or, on a

ground plane with sufficient area of approximately 60 x 60 cm
installed.

(VSWR ≤ 3:1)

• The COM antenna should be as much as possible separated from GPS

antennas installed (not less than 50 cm)

• The COM antenna should be as far as possible separated from ELT

antenna installed.
Some ELTs have exhibited re-radiation problems generating harmonics
that may interference with other receivers. This can happen when the
AR6201 is transmitting on certain frequencies such as 121.5 MHz or

121.175 MHz, which may cause the ELT output circuit to auto­oscillate.

2.7 Location of internal Circuit Breaker

The internal Circuit Breaker is resettable by means of a matching
nonconductive tool (may be self-made).

Figure 2-12 Location of the internal Circuit Breaker.

AR6201-(X0X)

Page 2-18 DV 14300.03/.04 Issue 5 5/2013

2.8 Installation Setup

2.8.1 Entering Installation Setup

The Installation Setup enables the avionics technician to set up the
equipment configuration (In-flight changes are not recommended).
The Installation Setup is accessible by holding down the “MDE” key
during power up.
The following screen appears:

Fig. 1 Password Dialog

Enter the password “6435” by means of the ”ROTARY ENCODER“ and push the
”ROTARY ENCODER“ to select the next digits.
Confirm by a short push on ”STO” key.

First page of Installation Setup appear:

Fig. 2 Example of an info page for AR6201-(X0X)

2.8.2 Page Up / Page Down in the Installation Setup

The Installation Setup consists of several pages.

By pushing on “↕/SCN” key or,

By pushing on “ROTARY ENCODER” the next page is displayed

By pushing on “IC/SQL” key the previous page is displayed.

2.8.3 Storage of Setup Data

The settings of a parameter are stored immediately after changing the
parameter.
Before leaving any setup page, no special action is required to do and
terminating the setup is always possible (refer to article 2.8.4 also).

2.8.4 Terminate Installation Setup

Just by switching “OFF” the AR6201-(X0X) the “Installation Setup” can be
terminated.
All changes made up to this time will be stored automatically.

AR6201-(X0X)

DV 14300.03/.04 Issue 5 5/2013 Page 2-19

2.8.5 Installation Setup Pages – Data Description

Display Contents Description

After initiating the “Installation Setup” the
first page will be displayed. This page shows
information about the SW version and the serial
number of the transceiver.

Select your option by turning

the “ROTARY ENCODER” and press

“STO” push-button to finalize

the selection.

One of the three following options may be
selected to dim the display and push-button
background lighting:

NONE:
The illumination for LCD and push-buttons is
controlled via the “ROTARY ENCODER“ of the
AR6201-(X0X). The Pilot can change the
brightness in the Pilots Menu (refer to chapter

3.13.2). Dimming via the “ROTARY ENCODER” is no
longer available after selecting one of both
options below.

0-14V:
The background lighting for LCD and push-buttons
is controlled (via pin P1-10/P1-23) by the
dimming bus of the aircraft.
The dimming curve will be adjustable within the
range from 0 … 14 V DC

0-28V:
The background lighting for LCD and push-buttons
is controlled (via pin P1-10/P1-23) by the
dimming bus of the aircraft.
The dimming curve will be adjustable within the
range from 0 … 28 V DC

Note:

This page is displayed only if

dimming bus is set to “NONE”,

otherwise the pages of “ILLUM

CURVE” adjustment will be

accessible.

The brightness of the LCD and push-button
illumination is adjustable between 0% and 100%.

Note: The same adjustment is also possible in
the pilot´s setup menu. Pilots can change the
parameter at any time.

Select your brightness by turning “ROTARY
ENCODER“.

AR6201-(X0X)

Page 2-20 DV 14300.03/.04 Issue 5 5/2013

Display Contents Description

ILLUM CURVE

I
L
L
U
M

14

V

ILLUM CURVE

I
L
L
U
M

ILLUM CURVE

I
L
L
U
M

ILLUM CURVE

I
L
L
U
M

ILLUM CURVE

I
L
L
U
M

Note:

This page is displayed only if

the DIMMING Input is either

selected for “14V or 28V” dim-

bus voltage.

(see Installation Setup page
“DIMMING Input”)

Provision for adjustment of the illumination

curve

(relation between dimming bus voltage and
brightness of the LCD and push-button
illumination)

on the following four points.

Use the “ROTARY ENCODER” for adjustments and a

push on “STO” button toggles between the 4

adjustment points.

voltage V2

voltage V1

(1) This adjustment defines where the

brightness increase will start.

(between 0 volt and V1 the brightness is zero, the
lowest trigger point for V1 can be adjusted to

≈1.5

Volts for a 14 volt dimming bus and to ≈ 4 Volts for
a 28 Volt dimming bus).

(2) With this adjustment is defined the value

of brightness increase when the trigger point of

V1 is reached.

(3) With this adjustment is defined the rate of

brightness increase starting at the trigger

point of V1 until V2 is reached.

(4) This adjustment is setting the point of

the max possible brightness related to a

certain value of the dimming voltage from where

the brightness is no more increasing even when

the dimming voltage can go up further.

AR6201-(X0X)

DV 14300.03/.04 Issue 5 5/2013 Page 2-21

Display Contents Description

Two options can be selected independe

nt from each

other on this page.

By means of the “ROTARY ENCODER” the requested
option can be highlighted and enabled/ disabled
by a push on “STO” button.

CHANNEL STORE:
Enabling this option provide the user the
possibility to store frequencies. Dedication of
the stored frequency to any of the 99 available
channels is possible.

(for details refer to chapter 3.9)

.

The User has access to previously stored “User
Channels” even if the “CHANNEL STORE” option is
disabled.

STORE LAST CHANNEL

If this option is enabled, the device
automatically stores the last used VHF frequency
in “Last Channel” database and user has a read
access to this database

(for details refer to chapter 3.9.2).

If this option is deselected there is no access
to and storage in the “LAST CHANNEL” database
possible.

Note:

There is no possibility to

deselect all options from the

“MDE PAGES”, therefore at

least one page will remain

active.

Deselecting “BATTERY VOLTAGE”

the “Direct Tune Mode” page is

no more available in the

normal operation of the

AR6201-(X0X).

There are three Frequency Selection Modes
providing different user interfaces for
convenient selection of the operating frequency.

(for details refer to chapter 3.5):

- STANDBY FREQUENCY enables/disables “Standard

Mode”

- BATTERY VOLTAGE enables/disables “Direct Tune

Mode”.

- CHANNEL MEMORY enables/disables “Channel Mode”.

By means of the “ROTARY ENCODER” the requested
option can be highlighted and enabled/ disabled
by a push on “STO” button.

St

oring a frequency in a specific channel will be

possible even if only “BATTERY VOLTAGE” or
“STANDBY FREQUENCY” remain selected.

AR6201-(X0X)

Page 2-22 DV 14300.03/.04 Issue 5 5/2013

Display Contents Description

If the supply voltage drops below the adjustable
threshold (10 … 33 V DC) the display indicates
the message “LOW BATT”.

The factory setting for this threshold

is 10.5 V.

The Low Battery threshold adjustment shall be
set, depending on the battery type in use, by
the installer.

The value can be adjusted by turning the “ROTARY
ENCODER”.

AR6201-(X0X)

DV 14300.03/.04 Issue 5 5/2013 Page 2-23

The CONFIGURATION page consists of

6 (max.7) selectable options.

(refer to the Note under “AUX AUTO
Mute” in the column on the right
side)

Use the “ROTARY ENCODER” to

scroll up and down.

continued from previous page:

Options 5 to 7 are visible.

Seven options are selectable on this page.

TANDEM

If “TANDEM” is selected a second controller
RCU6201 can be connected to AR6201-(X0X).

AUX INPUT
If “AUX INPUT” is selected the auxiliary
audio signal applied to pins P1-4 / pin P1­21 is audible on headphone / speaker.

Note: If the auxiliary audio input is not used it is

recommended to deselect “AUX INPUT”.

AUX AUTO MUTE
If “AUX AUTO MUTE” is selected the
auxiliary audio input will be muted also if
the receiver detects (based on squelch
evaluation) a signal, otherwise the user
has disabled the squelch.
Deselecting “AUX AUTO MUTE” the auxiliary
audio input signal and the receiver signal
will intermix continuously.

Note: Only if “AUX INPUT” is enabled “AUTO AUX MUTE”

will be displayed.

AUTO ISOL IN TX:

If “AUTO ISOL IN TX” is selected a
separation between the pilots and passenger
intercom circuits is provided while one of
the pilots transmits.

SCAN BEEP:
If “SCAN BEEP” is selected the transceiver
generates

(only in Scan Function)

a short
beep tone to notify a signal presence on
the “PRESET FREQUENCY” when this become
audible. If the switch over from the
“ACTIVE FREQUENCY” to the “PRESET
FREQUENCY”

during signal reception on the

“ACTIVE FREQUENCY”

is not possible, the
beep tone become generated and the audio
stay on the “ACTIVE FREQUENCY”.
Additionally the “PRESET FREQUENCY” appears
inverted in a sequence of approximately one
second.

FREQ CHANGE BEEP:
If “FREQ CHANGE BEEP” is selected the
transceiver generates a short “BEEP” on
each change of the “ACTIVE FREQUENCY”.

SWAP MIKE IC

If “SWAP MIKE IC” is selected the /IC
input function as /MIKE_SW input and
/MIKE_SW input operates as /IC input.

Select your option by turning “ROTARY
ENCODER” and pressing “STO” push-button.

AR6201-(X0X)

Page 2-24 DV 14300.03/.04 Issue 5 5/2013

Note:

This page is displayed only if

“ENABLE_AUX_IN” is selected.

The sensitivity adjustment of the Auxiliary
Audio Input (Pin P1-4 / Pin P1-21), in the
range 50mV to 8000mV, can be set by turning
the “ROTARY ENCODER”.

The VU meter shows the current signal level
of the Aux Audio Input and keep on
displaying the highest detected signal
value about 3 seconds.

When intercommunication is initiated
(regardless of the intercom activation:
“VOX”, or “/IC” discrete input) the signal
from auxiliary audio input will be
attenuated. The attenuation is adjustable
between 0 to 40dB.

After intercommunication is finished the
auxiliary audio will revert to its previous
level.

Note:

Only if “SWAP MIKE IC” in

Disabled

. Otherwise IN/OUT CFG 1

in displayed in “IC” input

inactive

(open)

This “IN/OUT CFG 1” menu provides
configuration of the audio in- and outputs
by means of the “ROTARY ENCODER” to change
the selection and the “STO” button to
select the desired function.

Note:

The first

two

sub-menus allow selection of only

one choice. All following sub-menus allow selection

or de-selection of all available options.

See also the Note in the left column.

Configuration of “MICROPHONE 1”

STD1 MIKE

If “STD 1 MIKE” is selected the Standard
Microphone input connected to (Pins P1-18/
P1-8) will be active.

NONE

If “NONE” is selected this Mike input will
be inactive.

Configuration of “MICROPHONE 2”

DYN MIKE

IF “DYN MIKE” is selected the Dynamic
Microphone input connected to (Pins P1-6/
P1-5) will be active.

NONE

If “NONE” is selected this Mike input will
be inactive.

AR6201-(X0X)

DV 14300.03/.04 Issue 5 5/2013 Page 2-25

Configuration of “MIC ACTIVATION”

BOTH MIKES

If “BOTH MIKES” is selected the

- input “/PTT” activates

TX modulation

from “MICROPHONE 1” and “MICROPHONE
2”,

- input “/IC” activates

intercom

from

“MICROPHONE 1” and “MICROPHONE 2”.

If “BOTH MIKES” is deselected the

- input “/PTT” (Pin P1-17) activates

TX

modulation

from “MICROPHONE 1” only,

- input “/IC” (Pin P1-7) activates

intercom

from “MICROPHONE 1” only.

Configuration of “OUTPUTS”

Note: This sub-menu allows to select both
choices.

HEADPHONE 1

If “HEADPHONE 1” is selected audio will be
available on headphone output (Pins P1­2/P1-3)

If “HEADPHONE 1” is disabled no audio is
available on headphone output (Pins P1­2/P1-3)

SPEAKER

Selecting “SPEAKER” make audio available on
speaker output (Pins P1-1/P1-14).

De-selection “SPEAKER” make audio
unavailable on speaker output (Pins P1­1/P1-14) and the internal speaker amplifier
circuit shut “OFF”, which results in lower
power consumption of the AR6201.

Note:

Only if “SWAP MIKE IC” in

Disabled

. Otherwise IN/OUT CFG 1

in displayed in “IC” input

inactive

(open)When “MIKE_SW”

input is in use both

configurations, “IN/OUT CFG1”

and “IN/OUT CFG2”, shall be

configured

This “IN/OUT CFG 2” menu consists of
identical sub-menus as described above
under “IN/OUT CFG 1”.

! See also the Note in the left column.

AR6201-(X0X)

Page 2-26 DV 14300.03/.04 Issue 5 5/2013

Note:

This page is only displayed if :

- Standard Mike 1 input is

selected in “IN/OUT CFG1”

and “MIKE_SW” input pin

status is inactive

- or “Standard Mike 1” input

is selected in “IN/OUT”

CFG 2 and “MIKE_SW” input

pin status is active

The sensitivity of Standard Microphone 1,
“STD 1 MIKE SENS”, input is adjustable
within a range of 9 mV to 1500 mV by
turning the “ROTARY ENCODER”.

The factory setting is 110 mV.

The VU meter display the current signal
level on the audio input and keep on
showing the highest signal value for 3
seconds.

While you are speaking with a normal voice
level to the microphone, for most of the
time, a convenient sensitivity is achieving
and the bargraph remain within the
predefined area.

Note:
The microphone sensitivity shall be adjusted to
achieve a correct modulation by keeping the cockpit
noise suppression as high as possible.

If the sensitivity is adjusted to a smaller value
(e.g. 10 mV) the cockpit noises may become louder than
for a higher adjustment (e.g. 100 mV).

Otherwise, adjusting the sensitivity to a very high
value (e.g. 1000 mV), the cockpit noise is very much
reduced, but the modulation of the transmitter might
be not sufficient.

The installer shall perform a communication check
after modification of this parameter. Recommended is
to perform this check with and without a running
engine.

Note:

This page is only displayed if :

- Dynamic input is selected

in “IN/OUT” CFG1 and

“MIKE_SW” input pin status

is inactive (open).

- or Dynamic Mike input is

selected in “IN/OUT” CFG 2

and “MIKE_SW” input pin

status is active (closed)

The sensitivity of the Dynamic Mike, “DYN
MIKE SENS”, input is adjustable within a
range of 0,5 mV to 25 mV by turning the
“ROTARY ENCODER”.

The factory setting is 3.5 mV.

While you are speaking with a normal voice
level to the microphone, for most of the
time, a convenient sensitivity is achieving
and the bargraph remain within the
predefined area.

Note:
The microphone sensitivity shall be adjusted to
achieve a correct modulation by keeping the cockpit
noise suppression as high as possible.

If the sensitivity is adjusted to a smaller value
(e.g. 1 mV) the cockpit noises may become louder than
for a higher adjustment (e.g. 25 mV).

Otherwise, adjusting the sensitivity to a very high
value (e.g. 25 mV), the cockpit noise is very much
reduced, but the modulation of the transmitter might
be not sufficient.

The installer shall perform a communication check
after modification of this parameter. Recommended is
to perform this check with and without a running
engine.

AR6201-(X0X)

DV 14300.03/.04 Issue 5 5/2013 Page 2-27

One of the three following options may be
selected for speaker volume source, “SPKR
VOL SRC”, by pushing the “STO” button:

PRIMARY CH

If “PRIMARY CH” is selected the speaker
volume will be adjustable by AR6201-(X0X).

SECONDARY CH

If “SECONDARY CH” is selected the speaker
volume will be adjustable by RCU6201.

BOTH

If “BOTH” is selected the speaker volume
will be adjustable by the arithmetic
average value from AR6201-(X0X) and
RCU6201.

Note: The “SPKR VOLUME SOURCE” shall be set to
“PRIMARY CH” if the optional second controller RCU6201
is not available.

The Noise Squelch threshold “SQUELCH THR”

is adjustable within a range between

figures 6 to 26 by turning the “ROTARY

ENCODER”.

Minimum Adjustment of 6 means:

Also weak RF signals can trigger the

Squelch threshold and the voice signal

might be low combined with a noisy

background.

Maximum adjustment of 26 means:

Only strong RF signals with can trigger the

Squelch threshold. The voice signal will be

audible very clear and without, or very low

noise in the background. Weaker RF signals

might not be able to trigger the Squelch

threshold and therefore do not become

audible for the pilots.

Note: Adjustment of the “SQUELCH THR” is also provided
in the “PILOTS MEUNU”, therefore this parameter can be
re-adjusted easily by pilot at any time. (refer to
“PILOTS MENUE” 3.13.2).

The “SCAN HOLD_TIME” is adjustable within

the range of 1 to 60 seconds

by turning the

“ROTARY ENCODER”.

Factory setting is 1 second and

it is recommended to leave the factory

setting at 1 second for normal airborne

operation

AR6201-(X0X)

Page 2-28 DV 14300.03/.04 Issue 5 5/2013

The Sidetone attenuation “SIDETONE ATT” is
adjustable within the range 0 … 12 dB by
turning the “ROTARY ENCODER”.

This attenuation is relating to the
intercom volume.
0 = Sidetone as loud as intercom signal.
12 = Sidetone signal 12dB more silent than
intercom.

Note:

If the intercom volume (refer chapter

3.13.1) is set to a very low value, also the
Sidetone is quite silent, even if adjusted to 0
(zero) attenuation on this page.
The “SIDETONE ATT” parameter is an additional
attenuation of the Sidetone signal in Transmit

Mode.

The AR6201-(X0X) provides two databases to
store up to 99 frequencies within the VHF­COM band, identified by channel numbers
(CH01 to CH99).

(refer to chapter 3.9 for further details).

Both, the “User Channels Database” and
“Last Channels Database” are erasable
selecting “YES” by means of the “ROTARY
ENCODER” and pressing “STO” push-button to
confirm this selection.

The AR6201-(X0X) provides a third database,
“FRQUENCY LABELS DATABASE”, containing 99
text labels of max 10 characters each. A
text label can be, to any of the channels
(CH01 to CH99), assigned. The Labels are
stored manually (for details see chapter

3.9).

This “LABELS DATABASE” is erasable
selecting “YES” by means of the “ROTARY
ENCODER” and pressing the “STO” push-button
to confirm this selection.

AR6201-(X0X)

DV 14300.03/.04 Issue 5 5/2013 Page 2-29

Note: This drawing shows all
monitored failures types.

Within the display frame of the
AR6201 only 4 failure types can
be shown.

By means of the “ROTARY ENCODER”
all further failure types become
in view.

This page displays information about all
failures occurred during operation of the
AR6201(X0X) and have been automatically
stored in the memory. This page may be very
helpful for trouble shooting and failure
isolation.

“0” means no failure was detected and
stored.
“1” means that a failure was detected once
or several times and stored.

This page is for information purpose only.

Selecting “YES” by means of the “ROTARY

ENCODER” and pressing the “STO” push-button

all stored failures

(see previous page)

erase

concurrently.

Only the factory or a maintenance shop

shall delete the “FAILURE LIST” after a

repair is completed.

The factory default settings are the

settings of the AR6201-(X0X) when it left

the factory after production.

Restoring the factory default settings

provided by selecting “YES” by means of the

“ROTARY ENCODER” and a short push on the

“STO” push-button.

Note:

Restoring the factory default settings will overwrite

all previous and customized installation settings !

AR6201-(X0X)

Page 2-30 DV 14300.03/.04 Issue 5 5/2013

2.9 Typical Settings in the INSTALLATION SETUP

2.9.1 Single Seater Glider

Typical Installation Wiring

Figure 2-5, Figure 2-6

Sub-Menu

Function: /

Selection

“SPKR VOLUME SOURCE”:

................ PRIMARY CH

“IN/OUT CFG1”:

“MICROPHONE 1”:

NONE

“MICROPHONE 2”:

DYN_MIKE

“BOTH MIKES”: ..

Enabled

“HEADPHONE 1”: .

Enabled

“SPEAKER”: .....

Enabled

“IN/OUT FG2”: N/A

Remarks

Permanent speaker sign

is visible on

LCD screen.

VOX operation suppressed.

AR6201-(X0X)

DV 14300.03/.04 Issue 5 5/2013 Page 2-31

2.9.2 Twin Seater Motor Glider

Typical Installation Wiring

Figure 2-7

Sub-Menu

Function: /

Selection

“SPKR VOLUME SOURCE”: ................

BOTH

“CONFIGURATION” “SWAP MIKE IC”:

Disabled

“IN/OUT CFG 1”:

“MICROPHONE 1”:

STD_

“MICROPHONE 2”:

NONE

“BOTH MIKES”: ...

Enabled

“HEADPHONE 1”: .

Enabled

“SPEAKER”: .....

Disabled

“IN/OUT CFG 2”:

“MICROPHONE 1”:

NONE

“MICROPHONE 2”:

DYN_MIKE

“BOTH MIKES”: ..

Enabled

“HEADPHONE 1”: .

Enabled

“SPEAKER”: .....

Enabled

Remarks The external switch (connected to pin J1-

24 /MIKE_SW) has the following functions:

Open: Standard Microphone is selected.

Speaker is disabled.

Intercom via VOX is possible.

Closed: Dynamic Microphone is selected.

Speaker is enabled.

No Intercom via VOX is possible.

Permanent speaker sign

is

visible on LCD screen.

AR6201-(X0X)

Page 2-32 DV 14300.03/.04 Issue 5 5/2013

2.9.3 GA aircraft using Standard Microphones

Typical Installation Wiring

Figure 2-8

Sub-Menu

Function: /

Selection

“SPEAKER VOLUME SOURCE”: ................

BOTH

“CONFIGURATION” “SWAP MIKE IC”:

Disabled

“IN/OUT CFG 1”:

“MICROPHONE 1”:

STD1_MIKE

“MICROPHONE 2”:

NONE

“BOTH MIKES”: ..

Enabled

“HEADPHONE 1”: .

Enabled

“SPEAKER”: .....

Disabled

“IN/OUT CFG 2”:

“MICROPHONE 1”:

STD1_MIKE

“MICROPHONE 2”:

NONE

“BOTH MIKES”: ..

Enabled

“HEADPHONE 1”: .

Enabled

“SPEAKER”: .....

Enabled

Remarks The external switch (connected to pin J1-

24 /MIKE_SW) has the following functions:

Open: Speaker is disabled,

Intercom via VOX is possible.

Closed: Speaker is enabled

No Intercom via VOX is possible

Permanent speaker sign

is

visible on LCD screen.

The Standard Microphone Input is selected

regardless of the position of the

external switch.

AR6201-(X0X)

DV 14300.03/.04 Issue 5 5/2013 Page 2-33

2.9.4 Aircraft with Intercom System

Typical Installation Wiring

Figure 2-9, Figure 2-10

Sub-Menu

Function: /

Selection

“SPKR VOLUME SOURCE”:

................

BOTH

“CONFIGURATION”

SWAP MIKE IC: ..

Disabled

“IN/OUT CFG 1”:

MICROPHONE 1: ..

STD1_MIKE

MICROPHONE 2: ..

NONE

BOTH MIKES: ....

Enabled

HEADPHONE 1: ...

Enabled

SPEAKER: .......

Disabled

“IN/OUT CFG 2”

:

MICROPHONE 1: ..

STD1_MIKE

MICROPHONE 2: ..

NONE

BOTH MIKES: ....

Enabled

HEADPHONE 1: ....

Enabled

SPEAKER: .......

Disabled

Remarks

The same configuration applies for
balanced and unbalanced wiring.

2.9.5 Tandem Seater Aircraft

Typical Installation Wiring

Figure 2-11

Sub-Menu

Function: /

Selection

“SPKR VOLUME SOURCE”:

................

BOTH

“CONFIGURATION”

“TANDEM”: ......

Enabled

“SWAP MIKE IC”:

Disabled

“IN/OUT CFG 1”:

“MICROPHONE 1”:

STD1_MIKE

“MICROPHONE 2”:

NONE

“BOTH MIKES”: ..

Enabled

“HEADPHONE 1”: .

Enabled

“SPEAKER”: .....

Disabled

“IN/OUT CFG 2”:

“MICROPHONE 1”:

STD1_MIKE

“MICROPHONE 2”:

NONE

“BOTH MIKES”: ..

Enabled

“HEADPHONE 1”: .

Enabled

“SPEAKER”: .....

Disabled

Remarks

Regulation of Volume, Intercom Volume and
VOX threshold is possible only for
AR6201-(0X0).

AR6201-(X0X)

Page 2-34 DV 14300.03/.04 Issue 5 5/2013

2.10 Retrofitting an AR4201 with an AR6201-(X0X)

In most cases, a retrofit of the AR4201 with an AR6201-(X0X) does not
cause any problem.
However, in some cases differences may occur because not all pins are
fully compatible.

!!! To connect the AR6201-(X0X) to an AR4201 wiring does not cause any

defect, neither to the AR6201-(X0X) nor to the aircraft installation.

2.10.1 Pin Compatibility

Pin

No.

AR4201

Pin Name

AR4201

Function

AR6201-

(X0X)

Pin Name

AR6201-(X0X)

Function

Fully

compa

tible

P1-1 AF-ASYM

Speaker
output,
unbalanced

SPK_HI Speaker output,

unbalanced

Yes

P1-2 AF-HI

Headphone
output,
balanced

HDPH_A

Headphone

output, balanced

Yes

P1-3 AF-LO

Headphone
output,
balanced

HDPH_B

Headphone

output, balanced

Yes

P1-4 AFAUX

Auxiliary
audio input,
unbalanced

AF_AUX_IN_HI Auxiliary audio

input,

unbalanced

Yes

P1-5 MIKE DYN

Dynamic
microphone
input, high
side,
(unbalanced)

MIKE_DYN_HI Dynamic

microphone

input,

(balanced)

Yes

P1-6 MIKE GROUND

Ground for
dynamic
microphone,

MIKE_DYN_LO Dynamic

microphone

input,

(balanced)

No

P1-7 IC

Intercom
input

/IC Intercom input Yes

P1-8 TEMS1

Input for
temperature
sensor

MIKE_STD_LO Ground

No

P1-9 RXD RS232 RXD NC Not connected

No

P1-10 -ILLUMINATION

Illumination,
low side

ILL_LO Illumination,

low side

Yes

P1-11 +13.75V

Positive
power supply

P_SUPP Positive power

supply

Yes

AR6201-(X0X)

DV 14300.03/.04 Issue 5 5/2013 Page 2-35

Pin

No.

AR4201

Pin Name

AR4201

Function

AR6201-

(X0X)

Pin Name

AR6201-(X0X)

Function

Fully

compa

tible

P1-12 +13.75V

Positive
power supply

P_SUPP Positive power

supply

Yes

P1-13 GROUND

Power supply
return /
Ground

P_SUPP_GND Power supply

return / Ground

Yes

P1-14 AF GND

MIKE STD GND

Ground SPK_LO Ground Yes

P1-15 AFCU

Normally not
used in
airborne
installation

LINE_OUT

Normally not

used in airborne

installation

No

P1-16 AGC/AFWB

Normally not
used in
airborne
installation

AGC_OUT

Normally not

used in

airborne

installation

No

P1-17 PTT Push To Talk /PTT Push To Talk Yes

P1-18 MIKE STD.

Standard
microphone
input, high
side,
unbalanced

MIKE_STD_HI Standard

microphone

input, high

side, unbalanced

Yes

P1-19 CPIN

coding pin
(removed pin)

CPIN coding pin

(removed pin)

Yes

P1-20 TEMS2

Ground for
Temperature
sensor

NC Not connected

No

P1-21 GNDDATA Ground AF_AUX_IN_LO Ground Yes

P1-22 TXD RS232 TXD NC Not connected

No

P1-23 +ILLUMINATION

Illumination,
high side

ILL_HI Illumination,

high side

Yes

P1-24 +13.75V

SWITCHED

Power on
monitor
Switched
positive
power supply.

/PWR_EVAL Power on

monitor,

open collector

output, GND if

“ON”.

No

P1-25 GROUND

Power supply
return /
Ground

P_SUPP_GND Power supply

return / Ground

Yes

AR6201-(X0X)

Page 2-36 DV 14300.03/.04 Issue 5 5/2013

2.10.2 Dynamic Microphone Input

Retrofitting an AR4201 with the AR6201-(X0X) in a typical glider
installation with a dynamic microphone is shown below:

Dynamic Mike

18

6

5

8

MIKE_STD_LO

MIKE_DYN_LO
MIKE_STD_HI

6

5

MIKE_DYN_HI

8

18

Figure 2-13 AR6201 with already existing interwiring for AR4201

Connect the cable shielding to pin P1-6, which is the low side input for
dynamic microphone. Because in AR6201-(X0X) this input is balanced, the
cable shield is not any more connected to ground (like it was case with
the AR4201). In most cases, it is not a problem. Carrying out the
following modification is recommended if interference with microphone
signal occurred:
Connect Pin P1-6 with Pin P1-8 (the cable shield is grounded). See
Figure 2-14.

Dynamic Mike

5

8

18

6

MIKE_STD_LO

MIKE_STD_HI

MIKE_DYN_LO

MIKE_DYN_HI

5
6

18

8

Figure 2-14 Modified Dynamic Microphone interwiring for AR6201

2.10.3 Temperature Sensor

The AR6201-(X0X) has no temperature sensor input, but a temperature
sensor connected between pin P1-8 and pin P1-20 (from previous
installation) has no impact to the operation of the transceiver.

2.10.4 RS-232 Interface

The AR6201-(X0X) has no RS-232 interface for remote control, but a RS­232 signal connected to pin P1-9 or pin P1-22 (from previous
installation) has no impact to the operation of the transceiver.

2.10.5 AFCU/AGC/AFWB

Normally not used in aircraft installations are Pin P1-15 and Pin P1-16.
Different functions of these pins will not cause any trouble when
retrofitting an AR4201.

AR6201-(X0X)

DV 14300.03/.04 Issue 5 5/2013 Page 2-37

2.10.6 /PWR_EVAL

The AR6201-(X0X) provides on pin P1-24 a low signal when the unit is
switched on and a high impedance signal, when switched “OFF”.
This function is different to the AR4201, which provides supply voltage
out when switched “ON” and no supply voltage when switched “OFF”.
If it is intended to switch “ON” and switch “OFF” a slaved equipment
together with the AR6201-(X0X) connect a relay on pin P1-24 as shown in
Figure 2-5.

2.11 Post Installation Tests

Note: It is assumed that the “Installation Setup” (refer Chapter 2.8)

has been done before the Post Installation Tests will be carried
out.

Once the AR6201-(X0X) is installed, complete a test procedure to verify
proper system operation. Ensure compliance with authority required
procedures. Refer to the Installation Order of the Minor Change document
or use an own approved test protocol for VHF-COM units. The following
chapter below provide guidance for such tests.
Refer to section 3 of this manual for detailed operating instructions.

2.11.1 Mechanical Installation and Wiring Check

Verify all cables are stored securely and shields connected properly to
signal ground. Check the movement of aircraft controls to verify there
is no interference. Verify all screws are tight well which keep the
AR6201-(X0X) in the installation cut out and the connectors on the rear
side of the unit are secured.

2.11.2 Power Supply

Check the power supply lines for correct polarity. Check that the
aircraft power supply is within the specified limits, with and without a
running engine (refer chapter 1.6.1).

2.11.3 Receiver / Transmitter Operation

Power up the AR6201-(X0X) and tune it to a local station for a
communication test. Verify that the receiver output produces a clear and
readable audio and ask the local station for proper readability of the
AR6201´s transmit signal. Repeat this communication test with an
airborne station in an radius between ≈ 20-40 NM.

2.11.4 Antenna Check

Check the VSWR (voltage standing wave ratio) over the complete frequency
band (e.g. by using a VHF Reflection-Coefficient Meter).
The VSWR ratio should be less than 2:1 and is not acceptable when
exceeding 3:1.
Refer chapter 2.12 for further guidance.

2.11.5 Interference Check

Check the AR6201-(X0X) while engine is running and all other avionics/
electrical systems on the aircraft are powered, to verify that no
significant interference exists. Check also that the AR6201-(X0X) does
not cause significant interference with other systems.
The installers standard test procedure may be used for the interference
check and the below table can be taken as a reference.
Depending on the individual avionic systems installed in the aircraft,
it might be necessary to extend the following checklist accordingly.

AR6201-(X0X)

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Aircraft Systems

Test
Result

System 1

Test
Result

System 2

Remarks

Audio/Intercom System

VHF COM 1 / COM 2

VHF NAV 1/2 (VOR/LOC) all
channels

UHF NAV 1/2 (GS) all channels

ADF

Marker Beacon

GPS 1/2 (see table below)

VHF / NAV 2 all channels

Marker Beacon

Motor(s)

Engine Instruments

Stormscope

Transponder

Air Data Computer

Autopilot and Servos

Magnetic Compass

AR6201-(X0X)

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Power the GPS and make sure that not less than 5 satellites are tracked.
Check the interference between the VHF-COM and the GPS receiver is in
the activated NAV mode. Select the following channels/frequencies on the
AR6201-(X0X) and on each frequency stay in TX and RX mode for at least
30 seconds. Verify that GPS integrity Flag is always out of view.

Channel

Frequency
(MHz)

Test Result
(√)

121.140 121.1416

121.150 121.1500

121.155 121.1500

121.160 121.1583

121.165 121.1666

121.175 121.1750

121.180 121.1750

121.185 121.1833

121.190 121.1916

121.200 121.2000

121.205 121.2000

121.210 121.2083

130.250 130.2583

131.240 131.2416

131.250 131.2500

131.255 131.2500

131.260 131.2583

131.265 131.2666

131.275 131.2750

131.280 131.2750

131.285 131.2833

131.290 131.2916

131.300 131.3000

131.305 131.3000

131.310 131.3083

For the remaining avionic equipment repeat all interference checks
during a flight and include all equipment not checked out on ground
before.
A communication performance check in the low, mid and high frequency
band of the AR6201-(X0X) should be included. Verify the receiver output
produces a clear and understandable audio output. Verify the transmitter
by contacting another station and getting a report of reliable
communications. Ensure the range check to a far station does not take
place closer than appx.100 m from your own position.

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Check the intercom function just by talking into the microphone, while
the engine is running at cruising rpm. You should hear yourself and/or
your co-pilot loud and clear.
Switch “ON” the squelch and check that the normal radio noise, without a
present carrier signal, is constant suppressed. The threshold of the
squelch can be set in the Pilots Menu.

2.11.6 Flight Test Check

It is highly recommended to perform flight test as final installation
verification. The performance of the AR6201-(X0X) may be verified by
contacting a ground station at a range of at least 50 nm while
maintaining an appropriate altitude and over all normal flight
attitudes. Check the performance in the low, mid and high band
frequencies.

2.12 Trouble Shooting

Problem Possible Reason Proposed Solution

Intercom function is not
working.

VOX not activated, or

the

threshold adjustment is
set too high.

Adjust the VOX trigger
level to a lower value.
A value of “-15” is
suitable in most cases.

Refer to chapter 3.13.1.

You cannot hear yourself
by talking into the
microphone.

Continued from previous
page

Intercom volume turned
“OFF”, or adjusted to a
very low signal level.

Adjust the intercom
volume to a higher
value. A value “37”
result in an intercom
signal level well
readable.

Refer to chapter 3.13.1.

Probably the microphone
input sensitivity level
adjustment is
insufficient and

adjusted

to a too high value.

Adjust the sensitivity
of the microphone input
to a lower value. For
standard mike a setting
of 50 … 120 mV is

typically sufficient for

most of the avionic
headsets.

Refer to chapter 2.8.5.

The VOX threshold can-

not

be

adjusted at all. VOX

is always “OFF”.

VOX function might be
deselected because the
speaker is “ON”.

Switch speaker “OFF”.

Refer to chapter 2.8.5.

A high

cabin noise is too

high during intercom /
transmission operation.

The sensitivity of the
microphone input is too
sensitive.

Adjust the microphone
sensitivity to a higher

value and this makes the

cabin noise relatively
decreased.

Recheck transmission
operation and/or
Intercom function.

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Problem Possible Reason Proposed Solution

Speaker output is not
working.

Speaker is switched “OFF” Switch speaker “ON”.

Refer chapter 2.8.5.(Page:

CONFIG and MIKE TYPE) and the

explanation about /MIKE_SW in

chapter 2.4.2.

The noise suppression
function of the squelch
is not working.

Receiver noise is always
present.

Some avionic (especially
non ETSO/TSO approved
avionic) is producing
quite high
electromagnetic
interference, possibly
received by AR6201-(X0X).

Reduce the interference
emitted by the avionic
around by improving
shielding, distance or
grounding.

Try to suppress the
interference by

adjusting the squelch to

a higher value.

Refer to chapter 3.13.2.

Note, that a higher
value cause

s a reduced

sensitivity.

The display shows a
warning or failure
message
(LOW BATT, STUCK PTT, TX
HOT, FAILURE)

Refer to chapter 3.14. Refer to chapter 3.14.

The Antenna VSWR exceeds
3:1.

Possibly caused by an
defective or
insufficient
counterpoise for the
antenna.

Check for sufficient
size of the
counterpoise and make
sure there is no
mechanical defect on
the antenna.

The impedance of the
antenna cable deviates
significantly from 50
Ohm.

Make sure the used
antenna cable has 50 Ω
impedance and the cable
is not pinched or
kinked on its way from
the radio to the
antenna.

Possibly caused by an
fault on the BNC
connectors of the
antenna cable.

Check for proper
crimp/solder work on
the BNC connectors and
rectify as far as
necessary.

2.13 Continued Airworthiness

The AR6201-(X0X) maintenance is defined as “on condition” only. No
scheduled or regular maintenance of this product is required.

To verify the frequency accuracy of the AR6201-(X0X) it is recommended
to perform a respective calibration test after 7 years.

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BLANK

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Section 3. OPERATION

3.1 Safety Instructions

For safe operation of the AR6201-X0X takes the following instruction
into account.

Turn the unit “OFF” before starting or shutting down the engine.

Speak loud and clear to the microphone while keeping it always close to
the lips. This ensures a crystal-clear readability of the transmitted
signal at the receiving station.

It is highly recommended to use the same type microphones or headsets,
which are suitable for use in aircrafts.

At power supply voltages below 10 V the speaker output of the
transceiver is automatically switched “OFF”, speaker sign will no longer
be presented on LCD display if activated before, the pilot must use
headphones to continue listening watch.
A “LOW BATTERY” message will appear all 3 seconds in the lower part of
the display if “LOW BATT THR” is to a suitable level adjusted within the
supply voltage range.

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3.2 Controls and Indicators

Figure 3-1 Controls and Indicators

Note: The following graphics of the AR6201-(X0X) display content

are shown in the 8.33 kHz channel spacing for all possible
operation modes.

Dedicated pictures are not explicit provided for the 25 kHz
modes because the basic display content is very similar and
they differ only in the number of digits for the frequency
indication. (Refer to chapter 3.4).

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DV 14300.03/.04 Issue 5 5/2013 Page 3-3

3.2.1 Controls

Description Main Function

1

IC/SQL

(Intercom/Sque

lch)

A ”Short press” during normal operation

toggles the

RX -SQL ON/OFF.

A “Long press” during normal operation

activates Intercom Menu.

2

MDE

(Mode)

A “Short press” during normal operation

changes to display page Frequency

Selection Mode.

“Long press” during normal operation

activates the Pilots Menu.

3

STO

(Store)

A ”Short press” during normal operation

activates storage procedure.

4

.

↕/SCN

(Exchange/SCAN

)

A ”Short press” during Standard Mode or

Scan Function exchanges Preset Frequency

and Active Frequency.

“Long press” activates Scan Function.

5

Volume Knob Turning the transceiver ON/OFF and

provide adjustment of the audio volume

level.

6

„ROTARY

ENCODER“

Turning the “ROTARY ENCODER” changes the

setting of several parameters

(frequency, IC-volume, VOX …).

A push on the “ROTARY ENCODER“ moves the

cursor to the next digit.

7

Display

When the user presses and holds down a key for at least 2 seconds, the
AR6201-(X0X) detects a “Long press” otherwise a “Short press” is
assumed.

The whole content of the AR6201-(X0X) display is inverted for a short
time, if any action is done by the user, e.g. pressing a key, and the
operation is not allowed at this time.

Beside the main functions, described in the table above, the controls
have additional functions. Description for these functions follow in the
chapters below.

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3.2.2 Symbols shown on the Display

Symbol Meaning

IC Intercom operation is active (triggered by VOX or

external IC key).

Intercom operation via VOX is disabled.

Speaker enabled in Installation Setup and not muted.

During Transmission and Intercom, the Speaker

automatically is muted.

TX The transceiver is in Transmission Mode

SQL The squelch function is active. Receiver noise only

suppressed.

SCAN Transceiver operates in Scan Function.

►

In “Scan” function, an arrow is visible. The arrow points

to the active or standby frequency from which the audio

is deriving (see chapters 3.5.4 and 3.7)

STO The transceiver performs a storage operation

LOW BATT

128.225 Inverted figures or letters on display ready to edit

3.3 Start–Up

CAUTION: Do not turn “ON” the VHF transceiver when engines are being

started or shut down.

Note: Excessive pulses on the DC bus of the aircraft may cause

damage on electrical circuits of any installed instrument.

a. Turn “ON” the VHF transceiver by turning the volume knob clockwise.
b. During PBIT the display indicates the message ”WAIT”, the software

version of “Control Head” (CH) and the software version of “Chassis
Module” (CM) are indicated.

c. If the PBIT has detected an error, the display indicates ”FAILURE”

(for details see chapter 3.14)

d. If no error has been detected the transceiver starts in the Frequency

Selection Mode last time used before switching “OFF” the unit.

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3.4 Receive and Transmission Operation

The VHF transmitter provides operation in two modes:

- Receive Mode

- Transmission Mode

3.4.1 Receive Mode

If /PTT input is inactive and PTT key is not pressed, the transceiver
stays in Receive Mode.

In Receive Mode the headphone output, if enabled, can provide a mixed

signal consisting of:

- received signal from antenna,

- intercom signal from intercom circuit (if intercom is active),

- signal from auxiliary input (if enabled).

In Receive Mode the speaker output, if enabled, can provide a mixed

signal consisting of:

- received signal from antenna on operating frequency,

- signal from auxiliary input (if enabled).

The signal from the auxiliary input can be automatically muted under
specific conditions.
Refer to chapter 3.10 for details.

3.4.2 Transmission Operation

If /PTT input is active (PTT key is pressed) the transceiver switches
into Transmission Mode. Microphone(s) signals can modulate the
transmitter.

The “TX” symbol in the left upper corner of the display indicates the
AR6201-(X0X) is in Transmission Mode.

In Transmission Mode, the most user actions (changing Frequency
Selection Mode, Channel Spacing Mode etc.), normally allowed in Receive
Mode, are blocked. As an exception, in Standard Mode the “Preset”
Frequency may still be changeable, even during transmission.

No intercom operation is possible in Transmission Mode.

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The Sidetone (demodulated audio of the transmitted signal) is available
on the headphone output. The Transmit Mode automatically deactivates the
Speaker.

Note: Transmission Mode is automatically terminated (return to

Receive Mode) after 120 seconds of continuous transmitting
even if PTT is still pressed. In this case “STUCK PTT” is
indicated (refer chapter 3.14). For initiation of a new
transmission, /PTT line needs first to become inactive.

3.5 Frequency Selection Modes

The following Frequency Selection Modes can be available on AR6201-(X0X):

-

Standard Mode (only this mode provides the Scan Function)

-

Direct Tune Mode

-

Channel Mode

The three modes (Standard Mode, Direct Tune Mode and Channel Mode)
provide different user pages on the display for convenient selection of
the operating frequency.

A consecutive short press on “MDE” key provide toggling between the
three pages, which appear in the flowing order:

Standard Mode

and

Direct

Tune Mode

and

Channel Mode

and back to

Standard Mode…etc.

The Scan Function is a sub-mode of the Standard Mode, providing
monitoring of two frequencies (Active Frequency and Preset Frequency) at
the same time.
A 2 seconds press on “↕/SCN” key activates/deactivates the Scan Function.

Out of the three pages from the Frequency Selection Modes any page can
be enabled or disabled in the Installation Setup but at least one page
must remain selected (see chapter 2.8.5, screen MDE PAGES in
Installation Setup).

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3.5.1 Standard Mode

Push on “MDE” key until the Standard Mode page appears.
In Standard Mode page, the display indicates the Active Frequency in the
top line and Preset Frequency in the bottom line.

Direct editing of the Active Frequency is not available like in the
Direct Tune Mode. On this page, only editing of the Preset Frequency is
possible. By the first push on the “ROTARY ENCODER“, the MHz digits are
inverted and turning the “ROTARY ENCODER” clock- or counter clockwise
change the frequency. Two further pushes on the “ROTARY ENCODER“, the
first inverts the 100 kHz and the second selects the 25 / 8.33 kHz
digits, enable for modification of the frequency.

A short press of the “↕/SCN” key exchanges the Active and Preset
Frequency. While the transceiver is in Transmission Mode, the Exchange
between the frequencies is disabled.
Pressing the “STO” key activates storing of the Active Frequency into
the next vacant memory place in the User Channels Database. (see chapter

3.9.1 for more details)

3.5.2 Direct Tune Mode

Push on “MDE” key until the Direct Tune Mode page appears.

If BATTERY VOLTAGE is deselected in the Installation Setup, this mode is

not

accessible! Only “Standard” or “Channel” mode are accessible.

The Active Frequency, indicated in the top line, in Direct Tune Mode is

editable by means of the “ROTARY ENCODER” as described in chapter 3.5.1.

The battery voltage, indicated in the bottom line shows the current value

of the supply voltage.

AR6201-(X0X)

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Direct editing of the Active Frequency is available in the Direct Tune
Mode. By the first push on the “ROTARY ENCODER“, the MHz digits are
inverted and turning the “ROTARY ENCODER” clock- or counter clockwise
change the frequency. Two further pushes on the “ROTARY ENCODER“, the
first inverts the 100 kHz and the second selects the 25 / 8.33 kHz
digits. The changes become active immediately.

Changing the Active Frequency is possible only when the transceiver is
not transmitting.
Pressing STO key activates storing of Active Frequency in User Channels
Database (see chapter 3.9.1)

3.5.3 Channel Mode

Push on “MDE” key until the Channel Mode page appears.
The Channel Mode provides selection of stored VHF frequency by means of
channel number (CH01 to CH99 or LAST1 to LAST9). The channel number
appears in the bottom line of the display, either CH01 to CH99 or LAST1
to LAST9. The top line shows the corresponding VHF frequency assigned to
the specific channel number. The bottom line contains a text label
assigned to the displayed VHF frequency. Any label already stored to a
VHF frequency will automatically assign to any new channel number when
the same frequency is stored.
The Channel Mode shows data from User Channels Database, or Last
Channels Database and Labels Database on the display. (For a detailed
database description, refer to chapter 3.9.)

The both pictures below show identification of the database in use by
means of prefix “CH” or “LAST” in front of the channel number.

Channel Mode Last Channel Mode

Toggling between the three Modes the Active Frequency always stays the
same.
After selecting Channel Mode, the channel number is indicated,
e.g.“CH03”, if the frequency has already an assigned channel number in
User Channels Database, otherwise the indication will be “CH--”.
In order to select a new channel number from USER Channels Database make
a short press or one clockwise turn on the “ROTARY ENCODER“. The Channel
Number is now inverted and the desired Channel is selectable turning
either clockwise or counter clockwise the “ROTARY ENCODER“. Each step
the receiver tunes immediately to the displayed VHF frequency. The Mode

AR6201-(X0X)

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of channel number selection can be left manually by consecutive short
press of the “ROTARY ENCODER“, or leaves the Mode automatically after 5
s timeout.
In order to select the new channel number from LAST Channels Database
make a counter clockwise turn on the “ROTARY ENCODER“. The Channel
Number is now inverted and the desired last used frequency, which is
related to one of the last nine channels, is selectable turning either
clockwise or counter clockwise the “ROTARY ENCODER“. The mode of channel
number selection can be left manually by a consecutive short press of
the “ROTARY ENCODER“, or leaves the Mode automatically after 5 s
timeout.
When leaving the LAST Channels Database and the last shown frequency is
not stored in one of the

USER cannels Database, “CH--” will appear on
the display.
Accessing the “Last Channels Database” will be possible if “STORE LAST
CHANNEL” selected on MEMORY OPTIONS page in the Installation Setup,
otherwise the recently stored VHF frequencies are not available.

Note: If the device operates in the 25 kHz Mode a selection of an

earlier stored 8.33 kHz channel is not possible. For
Selection of 8.33 kHz channels, the device has to operate in
the 8.33/25 kHz Mixed Mode.

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3.5.4 Scan Function

In all Frequency Selection Modes, a long press of “↕/SCN” key activates
the Scan Function and change to STANDARD MODE if activated from CHANNEL
or DIRECT TUNE Mode.
A short push on the “MDE” key, or a long press on “SCN” key terminates
Scan Function. After leaving Scan Function, the device will remain in
Standard Mode.
Simultaneously indicated on the display appears the Active Frequency on
the top line and the Preset Frequency on the bottom line. The SCAN sign
in the display indicates that Scan Function is active.

SCAN Mode

While Active Frequency and Preset Frequency detected a signal
simultaneously

, the Preset Frequency inverts and blinks. The Active

Frequency has priority. The arrow sign “►” in front of the Active
Frequency indicates audio from Active Frequency is audible. A sample
display shows the picture below.

Blinking

An audio notification “Beep” tone, if selected in the Installation
Setup, additionally to the blinking Preset Frequency notifies the
presence of an RX signal on the Preset Frequency.
If Preset Frequency detects an RX signal while on the Active Frequency
no signal

is present, the transceiver automatically switches over to the
Preset Frequency. The arrow sign now appear in front of the Preset
Frequency and the signal is audible. A sample display shows the picture
below.

Reception on Preset Frequency in Scan mode

Disabling Squelch in Scan Function provides audio of the Active
Frequency to the audio output all the time, regardless of the presence
of RF signal on Active Frequency or Preset Frequency).

AR6201-(X0X)

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A short push on “↕/SCN” key exchange, without leaving the Scan Function,
the Preset- with Active Frequency. While the transceiver is in
Transmission Mode this function is disabled.
A short push on the “ROTARY ENCODER” activates editing the Preset
Frequency (for details refer to 3.5.1 Standard Mode).

Note: Transmission always executes on the Active Frequency, even if

the monitored frequency is currently audible.

3.6 Squelch

Independent of the selected operation menu, squelch can be toggled
between “ON” and “OFF” by a short push on “SQL/IC” key.

118.200

SQL

119.300

118.

200

119

.300

Squelch “ON” Squelch “OFF”

If the squelch function is active (“ON”) the Receivers noise is muted.
In the Pilots Menu, the Squelch threshold is adjustable to a convenient
trigger level.
If the Squelch is “OFF” the arrow sign “►” in front of the Active
Frequency stays visible all the time.

3.7 RX Field strength indication

The RX field strength, represented inside the triangle “►” appearing in
front of the currently receiving frequency, fills the triangle not, half
or fully, depending on the strength of the signal. The field strength

symbol is available in all three Frequency Selection Modes.

- poor signal, signal just passing squelch level (triangle empty)

- good signal, signal include a minor level of noise (triangle half

filled)

- strong signal, very clear signal (triangle filled completely)

3.8 Channel Spacing Mode

The transceiver provide two frequency channel spacing operation modes,
selectable by means of pressing “STO” and “MDE” keys simultaneously for
at least 2 seconds.

8.33 kHz channel spacing (left) / 25 kHz channel spacing (right)

118.200

SQL

119.300

118.200

SQL

119.300

poor good strong

118.200

SQL

119.300

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Toggling of frequency channel spacing Mode is only available for AR6201­(0XX) variants. The AR6201-(1XX) variants cannot be toggled. The AR6201­(1XX) variants are operating in 25 kHz Mode only.

In 25 kHz Mode 5 frequency digits are shown. Only operating frequencies
with a channel spacing of 25 kHz are selectable. If 8.33 kHz channels
are not in use this mode provides the advantage of faster tuning since
skipping all 8.33 kHz frequencies.

In the “8.33 and 25 kHz Mixed Mode” the displayed frequency consist of 6
digits. The transceiver tunes to all possible frequencies within the
aviation VHF frequency band. The channel spacing and operating frequency
is derived automatically from the selected and displayed frequency
(refer chapter 1.4).

3.9 Storage Function

The VHF transceiver provides three databases:

1. User Channels Database

2. Last Channels Database

3. Labels Database

The “User Channels Database” provides 99 channels identified as CH01 to
CH99 and to each channel, the user can assign any frequency within the
VHF-COM range from 118.000 MHz to 136.9916 MHz by simply pressing the
“STO” button. All 99 channels are editable, when selected, after the
“STO” button is pressed.
The “User Channels Database” can be edited manually or uploaded/edited
by using a PC-application connected to an interface port on connector J1
of the AR6201.
The transceiver automatically stores nine last used frequencies into the
“Last Channels Database”, identified and easy to recall as LAST1 to
LAST9.
The “Labels Database” allows attaching a text label to each of the 99
stored VHF frequencies. To a particular VHF frequency, only one label is
assignable and the label length is limited to 10 characters. The “

Labels
Database” can be edited or uploaded/edited by using a PC-application
connected to an interface port on connector J1 of the AR6201.

3.9.1 Modification of User Channels Database and Labels Database

The User Channels Database and Labels Database can be modified (new
entry added or existing entry edited) only, if CHANNEL STORE option is
selected in the MEMORY OPTIONS page in Installation Setup (see chapter

2.8.5).
Pushing on “STO” key activates Database modification in Standard Mode,
Direct Tune Mode, or Channel Mode.
During this procedure, the display looks similar to the Channel Mode
with the difference “STO” appear on the left side of the display. In the
display top line the Active Frequency appears and the bottom line shows
the already assigned or next vacant channel number. The channel number
can be selected by means of the “ROTARY ENCODER“. The label ”FREE”
appear in front of “CHXX” if the selected channel number is vacant, but
if the selected channel number contains an already stored frequency
”USED” appears.

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“FREE” and “USED” channel indication.

By entering the storage procedure, the transceiver proposes the first
free channel for storing the Active Frequency. Beside the proposed
channel, also every other channel within the range 1 to 99 is selectable
by turning the rotary knob. For every selected channel, “USED” or “FREE”
appears respectively.

Pushing on the “STO” key once again assigns the Active Frequency to the
selected channel number, regardless of the channel is “FREE” or “USED”.
Afterwards the transceiver automatically activates storing of
alphanumeric label assigned to the Active Frequency.
If the frequency has no label attached, ten underscore signs become
visible, otherwise directly indicating the current label.
Cursor appears on the first position (see figures below).

125.875

STO

_ _ _ _ _ _ _ _ _

_

125.875

STO

_ _ _ _ _

DSB

-

T

By turning the “ROTARY ENCODER characters can be selected “. Selection
works in both directions (example: from “blank  A  B  C” by turning
clockwise and from “C  B  A  blank” by turning counter clockwise).
Each push on the “ROTARY ENCODER“ shifts the cursor to the next
position.
A short push on “STO” key stores the label and a long press on “STO” key
clears currently edited label.

After storing labels, the transceiver returns back to the previous
Frequency Selection Mode (Standard Mode / Direct Tune Mode / Scan
Function).
If no action occurs in label editing mode, the transceiver returns after
7 seconds to the previous Frequency Selection Mode without storing the
frequency and label information.
Recalling labels associated to the stored frequencies is possible in
Channel Mode (see chapter 3.5.3).

3.9.2 Automatic Storage Function

Transceiver automatically updates Last Channels Database only if STORE
LAST CHANNEL option selected in MEMORY OPTIONS page in the Installation
Setup (see chapter 2.8.5). The Transceiver provides possibility to store
9 recently selected VHF frequencies.

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The Last Channels Database of the transceiver updates automatically only
when operated in Standard Mode, Direct Tune Mode or Scan Function.
When a new Active Frequency stay selected for at least 10 seconds, the
VHF frequencies stored in LAST1, LAST2 … LAST8 shift to LAST2, LAST3 …
LAST9 and the current Active Frequency is stored as LAST1.
In Channel Mode the automatically stored frequencies “LAST” can be
recalled (see chapter 3.5.3).

3.10 Auxiliary Audio Input

The transceiver has an auxiliary audio input. In the Installation Setup,
enabling or disabling the auxiliary audio is provided (see chapter

2.8.5, page “CONFIGURATION”).
Is the input enabled, the audio signal applied to this input is
transferred to the audio output(s) while the transceiver is in Receive
Mode.
Is the input disabled, the adjacent input signal will be ignored.

AUX AUTO MUTE function depends on the AUX INPUT is selected on

CONFIGURATION page in the Installation Setup (refer to chapter 2.8.5).

AUX AUTO MUTE function will mute the audio signal from the auxiliary

audio input automatically, as long as the AR6201-(X0X) detects (based on

squelch evaluation) a RX from the signal or user deactivates the squelch

manually.

If this function is disabled the signal from the auxiliary audio input

is permanently audible on the audio output, independently of the

received signal or the squelch status.

Automatic aux attenuation functionality is coupled with the auxiliary

audio input (Installation Setup, screen AUTO AUX ATT in chapter 2.8.5).

The level of the auxiliary input signal attenuates if intercom is

activated by VOX or by /IC discrete input. The auxiliary input signal

reverts to its previous value after intercom deactivation. The

attenuation value can be adjusted within the range from 0 to 40dB.

The auxiliary audio input signal is, if enabled and not muted, mixed

with the received signal from antenna and the intercom signal (if

squelch triggered and intercom activated).

3.11 Intercom Operation

The transceiver has an internal built in intercom. With activated

intercom the signals from the microphones are mixed and amplified to

become audible on headphone output. This enables internal communication

via headsets between both pilots.

Intercom operation in Receive Mode is also possible:

- Automatically via VOX (threshold adjustable in the Intercom Menu),

- Externally via intercom switch (pin P1-7).

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If intercom operation is activated the “IC” sign is displayed.

Intercom operation is not possible in Transmission Mode.

Intercom activation via VOX is not possible if:

- Speaker is enabled (see chapter 0),

- VOX is disabled by the user (refer Intercom Menu, chapter 3.13.1).

In both cases, the display shows the sign to indicate that activation
via VOX is not possible.

Activation of Intercom operation provided by an external intercom switch
independent of VOX or speaker status (enabled/disabled). The external
intercom switch has priority. During intercom operation the Speaker
output is disabled

3.12 VOX & speaker operation

The AR6201-(X0X) disables VOX if enabling speaker in active Audio
Configuration.

With active speaker, enabled in Audio Configuration, VOX is always “OFF”
and intercom via VOX is not possible. This prevent from oscillation of
VOX due to acoustical feedback.

Speaker output is switched “OFF” even if speaker is enabled in current
Audio Configuration in one of the following cases:

- Transceiver is in Transmission Mode,

- Intercom is activated by external intercom switch (/IC input),

- Power supply is below 10 Volt.

3.13 Menus

During normal operation in one of the Frequency Selection Modes the
following menus can be activated:

- Intercom Menu for adjustment of intercom volume and VOX threshold,

- Pilots Menu for adjustment of panel brightness and squelch threshold.

3.13.1 Intercom Menu

A long press on “IC/SQL” key activates the Intercom Menu.
Another long press on MDE key terminates Intercom Menu, or leaves the
menu automatically after 5 s timeout.

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The Intercom Menu consists of two pages:

- Intercom Volume (first page),

- Intercom VOX (second page).

A short press on “IC/SQL” key provides toggling between the pages.

- Intercom Volume Menu

The Active Frequency stays indicated in the top line of the display,

while “IC VOLUME” label appears in the bottom lines. Below the label “IC

VOLUME” a bar graph with numerical value is displayed.

By means of the “ROTARY ENCODER“ the intercom volume can be changed from

0 to 46, 0 means minimum intercom volume, 46 means maximum intercom

volume. Intercom volume setting affects the Intercom audio signal and

Sidetone signal routed to the headphone.

Note: In installation with the second controller (see Figure 2-11),

adjustment of Intercom Volume by means of the RT6201 has no
effects. IC VOLUME can be regulated only by means of AR6201­(X0X).

A short press on the “IC/SQL” key activates the Intercom VOX page.

- Intercom VOX Menu

The Active Frequency stays indicated in the top line of the display. On

the next two lines the label ”IC VOX” and a bar graph with numerical

value are indicated.

By means of the “ROTARY ENCODER“, Intercom VOX threshold can be set.

Setting -30 means VOX is most sensitive and even a very low microphone

signal already triggers the VOX threshold for Intercom operation, +10

means that VOX is less sensitive and only high microphone signals

trigger the VOX threshold for Intercom operation.

Note: At a setting for VOX threshold of -15 a convenient behaviour of

the VOX should be achieved in most aircrafts. This requires that
mike sensitivity had been correct adjusted (Installation Setup).
If the mike sensitivity is incorrect adjusted, VOX may work not
satisfying.

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Note: In installation with the second controller (see Figure 2-11),

AR6201-(X0X) adjusts VOX threshold for Microphone 1 only,
RCU6201 adjusts VOX threshold for Microphone 2 only (see
description of /MIKE_SW pin in chapter 2.4.2).

An adjustment of the VOX threshold level is not possible if VOX forced
to be “OFF” (due to Enabled speaker in current Audio Configuration).

By changing the VOX threshold level to above +10, VOX can be switched
“OFF”. In this case, “OFF” replaces the numerical value indication (see
figure below):

If VOX switched “OFF”, activation of intercom operation by the external
intercom switch (/IC discrete input) is possible at any time.

3.13.2 Pilots Menu

Make a two seconds press on the “MDE” key to enter the Pilots Menu.
The Pilots Menu can be left by a two seconds press again on the “MDE”
key, or left automatically after a few seconds, or after a short push on
the “ROTARY ENCODER“ when SQUELCH setting page is visible.

The Pilots Menu consists of two pages:

- BRIGHTNESS (first page)

- SQUELCH (second page)

Toggling between the pages is provided by a short press on the “MDE”
key, or by a short press on the “ROTARY ENCODER“.

BRIGHTNESS

The Active Frequency stays indicated in the top line of the display.
Underneath the Active Frequency, the “BRIGHTNESS” label appears in
combination with a bar graph including a figure for the selected value.

The panel brightness for display illumination and pushbuttons can be
changed from 0 to 100 by turning the “ROTARY ENCODER“. Adjustment 0
means illumination is turns “OFF” completely and 100 means the
illumination is at maximum.

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Note: This page is not available if in Installation Setup the dimming

input is set to 14 V or 28 V. Dimming control by the aircrafts
dimming circuit is at this selection performed.

Another press on the “MDE” key change to SQUELCH and by means of the
“ROTARY ENCODER“, the setting can be changed. The Active Frequency stays
indicated in the top line of the display and on the bottom line
“SQUELCH” label appears together with a bar graph and a figure showing
the current value.

The squelch threshold can be changed from 6 to 26 by means of the
“ROTARY ENCODER“.
Adjustment 6 makes very week and noisy signals audible. Squelch opens at
about -105 dBm.
Adjustment 26 makes only quite strong signals with low noise content
audible. Squelch opens at about -87 dBm.

3.14 Warning and Failure Indications

Display Contents

Description

Reappear every 5 seconds.

“LOW BATT” appears after the supply voltage

of the transceiver dropped below the

threshold defined in the Installation Setup.

Transceiver still operates. Depending on

the

aircrafts supply voltage the

transceiver may

have a reduced performance. Below 10 volts

the speaker output is switched “OFF”!

Possible reasons for indication:

- Problems with battery capacity (gliders),

- Power interrupts,

- General problem of power supply,

- Wrong (too high) adjusted threshold in

Installation Setup (refer to

LOW BATTERY TRH

page in chapter 2.8.5).

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Display Contents

Description

Reappear every 5 seconds.

“STUCK PTT” indication appears after 120

seconds of continues transmitting. The

transceiver return to Receive Mode even if

the /PTT line is still active (GND).

For initiating a new transmission, the /PTT

line needs first to become inactive (open).

Possible reasons for indication:

- Transmitting more than 120 seconds.

- PTT-key stuck.

- /PTT line permanently grounded (short

circuit in installation).

Reappear every 5 seconds.

“TX HOT” indicates the internal device

temperature exceeds + 90°C.

The AR6201-(X0X) still operates, but the

transmitter has reduced RF output power.

Possible reasons for “TX HOT” indication:

- Too hot environmental temperature,

excessive long transmissions times in

insufficient airflow conditions.

Reappear every 5 seconds.

The transceiver has detected an internal

failure during normal operation.

Depending on failure reason, the device may

still operates with a degraded performance

or not operate at all.

Possible reasons for indication:

- Out of specified environmental conditions

- HW or SW failure inside the transceiver.

Contact maintenance shop for assistance.

The transceiver has detected an internal

failure during start up.

Depending on failure reason, the device may

still operates with degraded performance or

not operate at all.

Possible reasons for indication:

- Out of specified environmental conditions

- HW or SW failure inside the transceiver.

Contact maintenance shop for assistance.