AR6201
Page 1-2 DV 14300.03/.04 Issue 2 10/2010
1.4 Short Description
The VHF transceiver is designed as a single block unit for usage in cockpit environment of general
aviation aircrafts including helicopters under consideration of performed environmental qualification
(refer chapter 1.7) and SW Level (refer chapter 1.6.6).
The VHF transceiver is a compact and lightweight single block unit. The dimensions correspond to
the standard instrument diameter of 58 mm (2 1/4 inch). Mounting is by means of four screws (rear
panel installation). 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.
Frequency Indication
The frequency indication is done by means of a liquid crystal display (LCD). 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 overview refer 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.
136.9916 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 will be audible only when transceiver is in receive operation.
Sidetone
The sidetone is available on the headphone output during transmission. The sidetone volume is
coupled with the Intercom Volume.
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