General Description
Purpose of Equipment
DV14307.03 Issue 04 March 2016 Transceiver Family 620X 13
The manuals “Maintenance and Repair” (M&R), “Installation and Operation (I&O) and "Operation
Instructions" (OI) contain the following sections:
Section
M&R
I&O
OI
General X X N/A
Installation X X N/A
Operation X X X
Theory of Operation X N/A N/A
Maintenance and Repair X N/A N/A
Illustrated Parts List X N/A N/A
Modification and Changes X N/A N/A
Circuit Diagrams X N/A N/A
Certifications X N/A N/A
Attachments X N/A N/A
1.2. Purpose of Equipment
The 620X transceiver family enable voice communication between aircraft or between aircraft and
ground using the very high frequency band between 118.000...136.9916 MHz respectively
136.9750 MHz with a selectable channel spacing of 25 kHz respectively 8.33 kHz. The wide scope of
accessories also allows usage of the 620X VHF transceivers in ground-based applications.
The 620X Family is dedicated to applications where low power consumption is required. They are
capable to operate from standard 14 VDC and 28 VDC installations and from 12 VDC or 24 VDC
batteries.
Ultra low power consumption with extremely wide DC supply voltage range as well as compact and
lightweight design allows application for gliders and leisure aircraft up to 2000 kg and balloons.
Built-in 4-seat configurable intercom, transmitter output power up to 10 W and option for connection of
two controllers in tandem configurations extends the flexibility of the 620X Family.
The 620X transceivers also provide additional options such as:
• Intercom functionality for voice communication between aircraft crew and passengers
• Squelch functionality that automatically mutes receiver audio signal until clear signal is
received to avoid unwanted audio noise
• Scan functionality for simultaneous monitoring of two VHF channels (receive mode)
• AUX audio input for connection of additional audio devices like navigation receiver,
warning-tone generator, or MP3 music player.
• VHF channel database for easy access to predefined frequency channels
• Tandem functionality for synchronized operation of two controllers
1.3. General Notes
The word "frequency" also used in the sense of "channel name", as defined in EUROCAE,
document ED-23B chapter 1.3.2.
In this document the word "memory channel" or "channel" means a memory place identified by a
channel number, where a frequency may be stored for later use.
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