PS Engineering PMA5000EX Pilot’s Guide - Manual (Page 2)

Page 2 202-550-0100 PMA5000EX Pilot Guide
This pilot guide 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 advantage of its capabilities.
This publication covers the operating areas of the PMA5000EX sys-
tems. They are Com Transceiver Selection, Receiver Audio Selector,
Intercom, and use of the utility jack.
PMA5000EX controls
Power Switch (1) (Push OFF EMG-Fail Safe Operation)
The audio selector panel and intercom functions are turned on by
pressing the volume knob on the left side of the unit. The unit can be
left on, if you have an avionics master switch in the airplane.
When the unit is turned off, either by pressing the volume control, or
if the breaker is pulled removing power, the PMA5000EX is in Fail-
Safe mode. In this mode, the pilot’s headset is connected to COM 1
for transmit and receive, and connected to unswitched input #1 for
priority audio alerts. The fail safe audio will only be heard in the left
ear of a stereo headset.
Communications Transmit (XMT) Selection (2)
To select Com 1 or Com 2 for transmit, simply press the button on the
bottom row, next to the XMT legend. Both the bottom and top button
indicators will light, showing you that you can transmit and receive