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1.5 Split Mode
The split mode can be activated at any time by pressing the desired combination
of XMT buttons. For instance, to activate a Com 1/Com 2 split, press and hold
the com 1 button, and then press the Com 2 button while holding the Com 1 but-
ton. This places the pilot on Com 1 and the Copilot on Com 2.
Split mode for Com 3, in normal (not TEL/Duplex) is possible with pilot on Com 1,
copilot on Com 2 or 3. Pilot on Com 2 or Com 3 and Copilot on Com 1 is not possible.
Note
Due to the nature of VHF communications signals, and the size constraints in
general aviation aircraft, it is probable that there will be some bleed-over in the
Split mode, particularly on adjacent frequencies. UPS Aviation Technologies
makes no warranty about the suitability of Split Mode in all aircraft conditions.
Split Mode does not
turn off other (Nav, ADF, etc.) selected audio to pilot. How-
ever, the copilot will only hear the selected communications receiver.
1.5.1 Split Mode ICS
In split mode, the pilot and copilot are usually isolated from each other on the
intercom while simultaneously using their respective radios. Depressing the ICS
button in Split Mode will activate VOX intercom between the pilot and copilot
positions. This permits intercommunication when desired between the crew.
Pressing the ICS button again disables this crew intercom function.
1.6 Intercom Operation
1.6.1 IntelliVox® VOX-Squelch
No adjustment of the IntelliVox® squelch control is necessary. There is no field
adjustment. Through individual signal processors, the ambient noise appearing in
all six microphones is constantly being sampled. Non-voice signals are blocked.
When someone speaks, only their microphone circuit opens, placing their voice
on the intercom.
The system is designed to block continuous tones, therefore people humming or
whistling in monotone may be blocked after a few moments.
For consistent performance, any headset microphone must be placed within ¼-
inch of your lips, preferably against them. (ref: RTCA/DO-214, 1.3.1.1 (a)).
It is also a good idea to keep the microphone out of a direct wind path. Moving
your head through a vent air stream may cause the IntelliVox® to open momen-
tarily. This is normal.
The IntelliVox® is designed to work with normal aircraft cabin noise levels (70
dB and above). It loves airplane noise! Therefore, it may not recognize speech
and clip syllables in a quiet cabin, such as in the hangar, or without the engine
running. This is normal. For optimum microphone performance, UPS Aviation
Technologies recommends installation of a Microphone Muff Kit from Oregon
Aero (1-800-888-6910). This will not only optimize VOX performance, but will
improve the overall clarity of all your communications.