PS Engineering PMA450 Pilot’s Guide - Manual (Page 2)

Page 2 202-450-0000 PMA450 Pilot Guide Rev. 3
This section provides detailed operating instructions for the PS Engineering
PMA450, 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
PMA450 systems. They are Communications Transceiver Selection, Audio
Selector, Intercom, Marker Beacon Receiver and special functions, including
the Bluetooth® functionality in the PMA450.
PMA450 Operating Controls
Power Switch (1) (On/Off and EMG-Fail Safe Operation)
Unit power is turned on and off by pushing the volume knob (1). There is a
built in delay to prevent accidental shut off while adjusting the intercom vol-
ume in turbulent conditions. In the
OFF or "EMG" position, the pilot headset
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 transceiver and receiver selections will be re-
membered and return to the last state when turned on.
Menu Selection (6)
The PMA450 uses a Liquid Crys-
tal Display and three line-select
buttons to access advanced func-
tionality in a very logical manner.
Press the line select key to select
a specific item on each menu. Items are toggled on and off by pressing the
line select key as well.