Becker Avionics RT320911 User Manual

VHF

Transceiver

RT 3209 - ( )

Installation and Operation

Manual DV 60602.03
Issue 1 August 1997

BECKER FLUGFUNKWERK GMBH • Baden Airpark • P.O. Box 34

D-76549 Huegelsheim • Telephone 07229 / 305-0

FIRST ISSUE AND CHANGES

Issue . . . . . 1 . . . . . August 1997

LIST OF EFFECTIVE PAGES

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Title

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2-I - 2-II
2-1 - 2-8

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© by Becker Flugfunkwerk

All rights reserved

RT 3209 - ( )

Table of contents

Section I GENERAL DESCRIPTION Seite

1.1 Introduction 1-1

1.2 Purpose of equipment 1-1

1.3 General description 1-2

1.4 Variants survey 1-3

1.5 Technical data 1-3

1.5.1 Power supply 1-3

1.6 General data 1-4

1.6.1 Dimensions Weight, Fuse 1-4

1.6.2 Receiver data 1-5

1.6.3 Transmitter data 1-6

1.7 Software 1-7

1.8 Approval and Regulations 1-7

1.9 Environmental Qualification Form 1-8

1.10 Scope of delivery 1-9

1.11 Accessories 1-9

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RT 3209 - ( )

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RT 3209 - ( )

Section I GENERAL DESCRIPTION

1.1 Introduction

The following manual describes the VHF transmit/receiver RT 3209 - ( ). The manuals DV 60602.03
("Installation and Operation") and DV 60602.04 (Maintenance and Repair") contain the following
section :

Section DV 60602.03 DV 60602.04

1 General Information X X

2 Installation X X

3 Operation X X

4 Theory of operation X

5 Maintenance and Repair X

6 Illustrated Parts List X

7 Modification and Changes X

8 Circuit Diagrams x

1.2 Purpose of equipment

This remote-control VHF-transceiver RT 3209 - ( ) is controlled by a CU 5209 - ( ) control unit (or equal).
The transceiver enables voice communication on 760 channels in the 118.000 MHz to 136.975 MHz
range with a channel spacing of 25 kHz. It complies with the requirements of ICAO Annex 10 valid
from 01.01.1995.

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RT 3209 - ( )

1.3 General description

The transceiver is designed for installation in the avionics compartment.

The following are mounted on the connector end.

The equipment connector for connecting to the aircraft system.
The antenna socket for connecting the antenna.

The electronic system of the unit consists of the following circuit boards, which are connected to each
other by connectors.

l

1. Audio board

l

2 Connector board

l

3. Receiver board

l

4 Transmitter board

l

5. Processor board

The processor board is secured to the front panel by three bolts. The microcontroller as well as the
necessary storage and peripheral components are located on the processor board.

The VHF transceiver is fitted with a single superheterodyne receiver. A squelch (muting) circuit
suppresses transmitters or disturbances below a certain field strength. The switching threshold can
be set. The squelch function can also be switched off.

The transmitter is designed to be wideband over the 118.000 MHz to 136.975 MHz range. The sidetone
is automatically switched to the headphone output during transmission.

The oscillator frequency of the receiver and the transmitting frequency of the transmitter are generated
by a VCO (voltage controlled oscillator). This is monitored by a digital frequency evaluation circuit.
This digital frequency processing operates in conjunction with a microprocessor.

The microphone inputs are designed for parallel both dynamic and standard microphones. The inputs
are connected to a dynamic volume compressor which keeps the modulation voltage constant over a
wide input voltage range.

Aircraft internal communication is possible in the IC (intercom) mode. Activation is by means of an
external IC button (or switch) which is to be connected to the equipment connector.

The AF auxiliary input enables AF signal switching of auxiliary units in the aircraft. The switched
AF signals can, however, only be monitored in the reception mode.

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RT 3209 - ( )

Special functions

The transceiver contains some special functions which can be set in the service mode in
conjuntion with the control unit CU 5209 - ( ).

l

The squelch sensitivity, IC, sidetone and audio external input volume

l

The frequency setting can be inhibited. The transceiver then operates only on the
frequencies stored in the storage channels.

l

The storage of frequencies in the storage channels can be inhibited.

l

Access to the service mode can be interlocked with a 4-digit password.

1.4 Variants survey

Type designation Part No.: Transmitter output Power supply voltage

RT 3209 - (11)

60602-0000.000

0505.668-910 ≥ 6,5W
≥ 10W

13,75V

27,5 V

1.5 Technical data

1.5.1 Power supply

Nominal supply voltage 13.75 V.d.c.
Supply voltage range 12.4 V to 15.1 V

Emergency operation (10.0 V) Good intercom

or

Nominal supply voltage 27.5 V.d.c.
Supply voltage range 24.8 V to 30.3 V

Emergency operation (20.0 V) Good intercom

Power consumption

Standby" reception mode ≤ 100 mA
Reception mode ≤ 530 mA
Transmission mode ≤ 2.5 A

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RT 3209 - ( )

1.6 General data

Frequency range 118.000 MHz to 136.975 MHz

Number of channels 760

Channel spacing 25 kHz

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

Operating temperature range as per
EUROCAE/RTCA ED-14C/DO-160C -20°C to +55°C short-time +70°C

Operating altitude as per
EUROCAE/RTCA ED-14C/DO-160C 50 000 ft

Vibration as per
EUROCAE/RTCA ED-14C/DO-160C Cat. NM

Humidity as per
EUROCAE/RTCA ED-14C/DO-160C Cat. A/ +50°C: 95%, 48 h

1.6.1 Dimensions Weight, Fuse

Front panel 139 mm x 50 mm

Depth of transceiver with mounting plate 253 mm

Weight 1,2 kg

Fuse internal 4 A automatic cut-out

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