User Manual

PS Engineering Inc. ®
PAC15EX Audio Selector Panel and Intercom System
Installation and Operator’s Manual
200-015-0000 Page 3-2 Rev. 1, Jan. 2014
yoke mounted switch again, or select a different Com with the XMT buttons.
3.4 COM Audio Selector (3)
Communication audio from the other radio, not selected for transmit, can be heard by pressing the associ-
ated button. You will always hear the audio from the selected transceiver.
In SPLIT mode, only the pilot will hear selected navigation audio (A1 & A2).
3.5 Navaid Audio selection (4)
VHF Navigation receiver audio is selected through receiver control functions.
The MKR (Marker), ADF AUX (auxiliary) and DME audio is interfaced through an unswitched input.
3.6 Intercom Operation (8)
3.6.1 IntelliVox® VOX-Squelch
No manual adjustment of the IntelliVox® squelch control is possible. Through individual signal proces-
sors, the ambient noise appearing in all four microphones is constantly being sampled. Non-voice signals
are blocked. When someone speaks, only their microphone circuit opens, placing their voice on the inter-
com. The intercom can be configured for high noise environment by internal switching. See § 2.7 for
more information.
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, prefera-
bly against them. (ref: RTCA/DO-214, 1.3.1.1 (a)).
NOTE
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.
For optimum microphone performance, PS Engineering 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.
Table 3-1 Mic Muff ™ Part Numbers
Manufacturer Model Mic Muff™ Part Number
Bose Dynamic
Electret
M87 Dynamic
90010
90015
90020
David Clark H10-30
H10-20, H10-40
H10-13.4
90010
90015
90015
Lightspeed All 90015
Peltor 7003
7004
90010
90015
Pilot 11-20 & 11-90 90015
Sennheiser 90015
Telex Airman 750, Echelon
AIR3000
90015
90010