Page 6
202-890-0202
PMA8000B Pilot Guide Rev. 7
Intercom Operation
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
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 mo-
ments.
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 important to have the microphone element par-
allel to your mouth, and not twisted inside the cover.
Oregon Aero MicMuff Part Numbers
Headset
Manufacturer
Model
Part Number
Bose
Dynamic
Electret
M87
90010
90015
90020
David Clark
H10-30
H10-20, H10-40
H10-13.4, 13X
H20-10X
90010
90015
90015
90015
Lightspeed
All
90015
Peltor
7003
ANR Pro, 7000
90010
90015
Pilot
11-20, 11-90, 1776, DXL
90015
Sennheiser
All
90015
Telex
Airman 750, AIR4000
AIR3000, Echelon 100
90010
90015
Note: For optimum microphone performance, we recommend
use 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.