PS Engineering Inc. ®
PAR100EX Audio Selector Panel and Intercom System
Installation and Operator’s Manual
200-760-0000
Page 3-4
Rev. 11, Feb. 2013
When MON is active, the receiver is tuned to the Standby frequency and passes received audio on that
channel. When the Active frequency receives a signal, the signal from the active frequency is automati-
cally provided to the audio.
Both active and standby frequencies are monitored at the same time for a signal. A signal can be received
on either the active or the standby frequency.
While receiving a signal on the active frequency
- the standby channel is
NOT
monitored.
While receiving a signal on the standby frequency
- the active channel is periodically monitored. If a sig-
nal is found on the active frequency the
M760REM
will revert to the active frequency. After a signal has
been received, the
M760REM
will return to monitoring both frequencies.
It will be important to remember which frequency is active and which is standby, to avoid answering a
transmission on the standby frequency by transmitting a response on the active frequency.
NOTE:
Although the M760REM can select and receive on the VHF NAV frequencies (108.00 to 117.95 MHz),
transmission is inhibited.
3.7 Intercom Operation (8)
3.7.1
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 § 2.10 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
