PS Engineering PMA7000CD Installation Manual - Manual (Page 23)

PS Engineering
PMA7000CD Audio Selector Panel and Intercom System
With PCD7100-R Remote Compact Disc Player
Installation and Operator’s Manual
200-790-0010 Page 3-3 Revision 10, September 2005
3.4.2 Key “Click”
The PMA7000CD is equipped with a “click” function that provides an aural feedback to the user in addi-
tion to the tactile button push. This sound can be enabled or disabled by simultaneously holding the COM
1 and COM 2 buttons in for at least 5 seconds. Any person hearing the radios will also hear the key click.
Allow at least 20 seconds between turning the key click on and off.
3.5 Split Mode
The split mode can be activated at any time by pressing the desired combination of XMT buttons. For in-
stance, 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 button. 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.
N o t e :
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, par-
ticularly on adjacent frequencies.
PS Engineering makes no warranty about the suitability of Split Mode in all aircraft
conditions.
Note: Split Mode does not turn off other (Nav, ADF, etc.) selected audio to pilot. However, the copilot will only hear
the selected communications receiver.
3.5.1 Split Mode ICS
In split mode, the pilot and copilot are usually isolated from each other on the intercom, simultaneously
using their respective radios. Depressing the ICS button in Split Mode will activate VOX intercom be-
tween the pilot and copilot positions. This permits intercommunication when desired between the crew.
Pressing the ICS button again disables this crew intercom function.
3.6 Intercom Operation
3.6.1 IntelliVox® VOX-Squelch
No adjustment of the IntelliVox® squelch control is necessary. There is no field adjustment. Through three
individual signal processors, the ambient noise appearing in all six microphones is constantly being sam-
pled. 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 momentarily. 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.