PS Engineering PMA8000C Installation Manual - Manual (Page 22)

PS Engineering
PMA8000C Audio Selector Panel and Intercom System
Installation and Operator’s Manual
200-890-0303 Page 3-1 Rev. 3, May 2014
Section III OPERATION
3.1 SCOPE
This section provides detailed operating instructions for the PS Engineering PMA8000C, Audio Selector
Panel/Marker Beacon Receiver/Intercom Systems. Please read it carefully before using the equipment so
that you can take full advantage of its capabilities.
This section is divided into sections covering the basic operating areas of the PMA8000C systems. They are
Communications Transceiver Selection, Audio Selector, Intercom, Marker Beacon Receiver and special
functions, including the Bluetooth® functionality in the PMA8000C.
Figure 3-1 PMA8000C Operating Controls
Unit power is turned on and off by pushing the volume knob. In the OFF or "EMG" position, the pilot head-
set is connected directly to COM 1 as well as unswitched input #1. This allows communication capability
regardless of unit condition. Any time power is removed or turned
OFF , the audio selector will revert to fail-
safe mode.
The power switch controls all audio selector panel functions, intercom and marker beacon receiver. All
pushbutton selections will be remembered and return to the last state when turned on.
3.2 Communications Transmit (XMT) Selection (2)
There are three pushbuttons associated with the transmitter selection. The three lower buttons (# 2) control
which transceiver is selected for transmit. The top row of pushbuttons (# 3) allows selection of the receiver
audio. Push the lower button to select the desired COM transmitter.
The PMA8000B-Series has an automatic selector system. Audio from the selected transceiver is automati-
cally heard in the headsets and speaker (if selected). You can check this function by switching from COM 1
transmitter to COM 2 or COM 3 transmitter by pressing the transmitter selector pushbutton. See that the
associated COM 2 or 3 receive pushbutton indicator light that is located immediately in the transmitter
pushbutton turns green. This guarantees that the pilot will always hear the audio from the transceiver select-
ed for transmit.
The PMA8000C “remembers” the receiver selection, so that when switching transmitters from COM 1 to
COM 2, if COM 2 or COM 3 audio was previously selected, COM 1 audio will continue to be heard. This
eliminates the pilot having to switch COM 1 audio back on, after changing transmitters.
When switching from COM 1 to COM 2 or COM 3 while that COM was not previously selected, COM 1
audio will be switched off. In essence, switching the mic selector will not override prior selection of COM
receiver audio.