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July 2019 PAC45 Pilot Guide
Telephone control
The volume control selector connects the audio controller to
either a Bluetooth®
-
enabled cell phone or a wired cellular/
satellite phone.
Push to pop out the volume control to select (answer or make
phone call) and adjust the receive audio volume. This knob must be out to
use the telephone function.
To hear the ringer of the Bluetooth phone, the volume control should be
around the 12 o
’
clock position. Selecting the TEL switch in the OUT posi-
tion is not required.
Intercom Operation
IntelliVOX® Intercom 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 con-
stantly 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; there-
fore 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
-
214A,
§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 lev-
els (70 dB and above). It loves aircraft noise! Therefore, it may not recog-
nize 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 instal-
lation of a Microphone Muff Kit from Oregon Aero (1
-
800
-
888
-
6910). This
will not only optimize VOX performance, but will improve the overall clar-
ity of all your communications.
Push to talk intercom (PTT ICS)
Pressing the intercom volume knob (ICS VOL) will place the system into
the Push
-
to
-
talk (PTT for Intercom use) mode. This will disable the voice
