PS Engineering PMA5000EX Installation Manual - Manual (Page 17)

PS Engineering
PMA5000EX Audio Selector Panel and Intercom System
Installation and Operator’s Manual
200-550-0100 Page 3-1 Rev. 1 Jan. 2011
Section III OPERATION
3.1 SCOPE
This section provides detailed operating instructions for the PS Engineering PMA5000EX, Audio Selector
Panel/Intercom Systems. Please read it carefully before using the equipment so that you can take full a d-
vantage of its capabilities.
This section is divided into sections covering the basic operating areas of the PMA5000EX systems. They
are Communications Transceiver Selection, Audio Selector, Intercom special fun ctions.
Figure 3-1 PMA5000EX Operating Controls
3.2 Power on-off EMG (1)
Unit power is turned on and off by pushing the volume knob. In the OFF or "EMG" position, the pilot
headset is connected directly to Com 1 as well as unswitched input #1. This allows communication cap a-
bility 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, and intercom. All pushbutton selections and
function modes will be remembered and return to the last state when turned on.
3.3 Communications Transmit (XMT) Selection (2)
There are two pushbuttons associated with the communications transceiver selection. The two lower but-
tons (# 2) control which transceiver is selected for transmit. The top row of pushbuttons (# 3) allows selec-
tion of the receiver audio. Push the lower button to select the desired COM transmitter.
The PMA5000EX-Series has an automatic selector system. Audio from the selected transceiver is auto-
matically heard in the headsets. You can check this function by switching from C
OM 1 transmitter to Com
2 transmitter by pressing the C OM 2 transmitter selector pushbutton. See that the associated Com 2 receive
pushbutton indicator light that is located immediately above the Com 2 tran smitter pushbutton turns
green. This guarantees that the pilot will always hear the audio from the transceiver selected for transmit.
The PMA5000EX “remembers” the receiver selection, so that when switching transmitters from C OM 1 to
C OM 2, if C OM 2 audio was previously selected, C OM 1 audio will continue to be heard. This eliminates