Power And Fail Safe - PS Engineering PAC45 System With MultiTalker Pilot's Manual And Operation Manual

Power and Fail Safe

Unit power is controlled by the transmit-
ter (XMT) selector knob. In the "EMG"
or off (fully clockwise) position, the pilot
headset is connected directly to COM 1
as well as alerts and unswitched input #1.
This allows communication capability
regardless of unit condition. NAV1 au-
dio is also provided to the pilot in the
other ear of a stereo headset.
In Fail Safe (EMG) on the Copilot panel, that position will hear COM 2. The
copilot can place the control panel in EMG
without affecting pilot operation.
Any time power is removed or turned off, the
audio selectors will revert to fail-safe mode.
If fail-safe audio is present in both ears of a
stereo headset, or completely absent, verify
that a stereo headset is used and is selected
for stereo mode.
The power controls all audio selector panel
functions, and intercom.
The Observer Audio Panel has an OFF posi-
tion. This removes observer and passenger audio as well as transmit or receive
from radios. There is no ail-safe audio in the observer audio panel.
Revision 2 PAC45 Pilot Guide 202-045-0300 Page 3