Specifications

PS Engineering
PMA7000M-S Series Audio Selector Panel and Intercom System
Installation and Operator’s Manual for Civil Air Patrol
200-072-0004 Page 3-4 Rev. 4, Sept. 2000
Figure 3-2 CAP Version Mic Selector
Normal Swap
Mic Selector Pilot Copilot Pilot Copilot
Com 1 Com 1 Com 1 Com 2 Com 2
Com 2 Com 2 Com 2 Com 1 Com 1
Com 3 Com 3 Com 3 No Swap No Swap
Com1/2 Com 1 Com 2 Com 2 Com 1
Com 1/3 Com 1 Com 3 Com 3 Com 1
Com 2/3 Com 2 Com 3 Com 3 Com 2
Table 3-1 Transmitter Combinations
3.6 Intercom
3.6.1 IntelliVox®VOX-Squelch
No adjustment of the IntelliVox®squelch control is necessary. Through three 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, 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 best performance, the headset microphone must be placed within ¼ inch of your lips,
preferably against them. 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.
For optimum microphone performance, PS Engineering, Inc. 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 3-2 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