Audio Selector; Cockpit Speaker; Intercom Operation - PS Engineering PMA8000C Operation Manual

deselected, even if you select, and then deselect its transmitter.
Unless the audio panel is in "split" mode, the PMA8000C gives priority to
the pilot's radio Push-To-Talk (PTT).
If the Monitor function is activated (Monitor), the audio from this radio
will be muted when the primary radio (selected for transmit) is receiving a
signal.
In cell phone mode, the pilot is connected to the cell phone, but still hears
the COM radios selected. The radio PTT will switch the mic to the selected
com, and allow continued aircraft communications to continue. (See Page
6—Cellular telephone—for more
details)

Audio Selector (4)

These buttons select the switched
navigation receivers. The DME in-
put (if present) is also shared with
AUX. In SPLIT mode, only the pilot
will hear selected navigation audio.

Cockpit Speaker (5)

This switch will place all selected audio on the cockpit
speaker when this switch is selected. In "Split" mode, the
speaker carries the same audio as the pilot.
Depending on installation, important audio alerts such as radar altimeter or
autopilot disconnect will come over the speaker even if it is not selected,
while other unswitched inputs, will only be present if the SPR button is se-
lected. Consult your professional avionics installer for these important con-
figuration details.

Intercom Operation

IntelliVox® VOX-Squelch
IntelliVox® is PS Engineering's proprietary intercom squelch control.
Through the use of digital processors, each microphone is monitored, and
opens instantly when human speech is detected. This results in seamless con-
versations aboard the airplane for crew and passengers, without syllable clip-
ping or fatigue-inducing noise.
No adjustment of the IntelliVox® squelch control is necessary. There is no
field adjustment. 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
May 2015 PMA8000C Pilot Guide
202-890-0303 Page 3