PS Engineering PAR200A Installation Manual - Manual (Page 28)

PS Engineering Inc. ®
PAR200A Audio Selector Panel, COM radio Controller and Intercom System
Installation and Operator’s Manual
200-228-0200 Page 3-6 June 2014
Bandwidth (kHz) Frequency Displayed
25 118.07500 118.075
8.33 118.07500 118.080
8.33 118.08333 118.085
8.33 118.09166 118.090
25 118.10000 118.100
8.33 118.10000 118.105
This format is continued through to 136.990
8.33 136.99166 136.990
3.8 Intercom Operation (8)
3.8.1
IntelliVox® VOX-Squelch
No manual adjustment of the IntelliVox® squelch control is possible. Through individual signal processors,
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 intercom.
The intercom can be configured for high noise environment by internal switching. See §
2.9 for more in-
formation.
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)).
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