Power And Fail Safe - PS Engineering PAR200B Pilot's Manual And Operation Manual

This section provides detailed operating instructions for the PS Engineering
PAR200B, Audio Selector Panel/Intercom/VHF Communication Control
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
PAR200B systems. They are Communications Transceiver Selection, Audio
Selector, Intercom, VHF COM, entertainment, telephone, and display.

Power and Fail Safe (1)

Unit power is turned on and off by pushing the volume (left) 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 capability regardless of
unit condition. Any time power is removed or turned off, the audio selector
portion will revert to fail-safe mode.
Page 2 202-228-0300 PAR200B Pilot Guide