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
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