AR6201 - RT6201 - RCU6201 - AR6203
Page 1-8 DV 14307.03 Issue 1 09/2013
additional external decupling/isolation resistors. The external audio is
audible only when the transceiver is in receive mode.
The individual audio volume is set directly at the particular external
equipment.
Sidetone
The sidetone is available on the headphone output during transmission.
The sidetone volume automatically adapts to the intercom volume setting.
Squelch Operation
When enabled the squelch (muting) circuit suppresses weak signals. There
are two kinds of squelch methods implemented: carrier squelch and noise
squelch. The carrier squelch depends on received signal strength and is
adjustable in the installation setup; the noise squelch depends on
detected noise level and is adjustable in the pilot setup.
Memory Channels
The memory function allows storage of up to 99+9 frequencies. This
memory may contain up to 99 frequencies stored manually or programmed
from PC that can be labeled with VHF channel numbers or assigned text
label. Additionally the last recently used (active) 9 frequencies are
stored automatically as “LAST” channels. A user defined text label can
also be assigned for each stored frequency.
Intercom Operation
Aircraft internal communication via connected headsets is provided by
the built-in intercom circuit. The 620X has two intercom circuits:
“Front row” and “Back row”. A maximum of four headsets can be connected
(for example pilot & copilot on first circuit and two passengers on
second circuit).
Scan Mode
In scan mode a dual watch function is provided. The device is capable of
monitoring frequencies on two channels, active & preset simultaneously.
The signal of the active frequency will always be audible, since it will
have priority at all times.
Tandem operation
Tandem mode enables operation of two controllers simultaneously. The
controllers are synchronized, so that both display the same information
Illumination
The illumination of LCD and push buttons can be controlled either
directly from the front panel via the pilots menu or externally via the
dimming input lines. If the external dimming is selected, the
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