PS Engineering PAC45 System Pilot's Manual And Operation Manual

9800 Martel Road

Lenoir City, TN 37772

www.ps-engineering.com

PAC45 System

Flying Never Sounded So Good!®

Pilot’s Guide

and

Operation Manual

FOR SINGLE SYSTEMS

202-045-0100 Revision 2 July 2019

Serial Number GH01139 and above

FAA TSO C139a

PS Engineering, Inc. 2019 ©

Copyright Notice

Copyrighted information in this manual is subject to change without notice. PS Engineering reserves the right to
improve or change the products or contents of this manual, without notification of any person or agency. The
contents of this pilot’s guide may be downloaded, stored and reprinted for personal use provided that this copyright
information is included. Commercial use is strictly p rohibited. For further information contact the Publications
Manager at PS Engineering, Inc., 9800 Martel Road, Lenoir City, TN 37772. Phone [phone]

202-045-0100 Page 1 Revision 2 PAC45 Pilot Guide

This section provides detailed operating instructions for the PS Engineering
PAC45, Audio Selector Panel/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
PAC45 systems. They are Communications Transceiver Selection, Audio
Selector, Intercom, and special functions, including the Bluetooth® func­tionality in the PAC45.

PAC45 Operating Controls

Power and Fail Safe

Unit power is controlled by the transmitter (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 audio is also pro­vided to the pilot in the other ear of a stereo headset.

Any time power is removed or turned off, the audio selector 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.

Page 2 202-045-0100 July 2019 PAC45 Pilot Guide

Communications Transmit (XMT) Selection

The PAC45 has a rotary control knob to select
communications transceiver functions. To select a
transceiver for transmit; turn the knob to select the
desired radio from the six available.

The radio is automatically selected to receive in­coming radio calls when the XMT is selected.
With a PAC45, you will never transmit on a radio
that you are not receiving. The selected audio is
indicated by both knob position and the green
text.

COM Audio Selector

The communications receiver
audio sources are controlled by
a combination push on-push-off
switch/volume control. Com­munication audio from another radio, not selected for transmit, can be heard
by pressing the associated RCV switch, which will place it in the OUT posi­tion. The selected audio is indicated by both knob position and the green no­menclature text.

You will always hear the audio from the selected transceiver, even if the se­lected comm audio is turned all the way down on the audio controller because
it cannot turn the selected receive audio all the way off.

The volume of the received source is adjusted by rotating the knob.PS Engi­neering recommends a lower volume at the radio and higher audio panel set-
ting to minimize noise.

Receiver Activity Indication (-RXI)

PAC45 systems (HUB45 Serial Number DH1069 and above) have a Receive
Activity Indicator that flashes the selected receiver indicator when a signal is
present on that receiver. This allows the user to spot an active radio, even if
the volume is turned down. This function is activated at the factory at the in-
staller’s request, and can be changed at the factory.

MultiTalker™ Head Related Transfer Function (HRTF)

Communication receiver audio signals are presented to the DSP and processed
to “appear” in a different location to the crew.
“MultiTalker” (US Patent #7,391,877) specifies up to nine loca­tions. This helps the crew to better comprehend speech by locat­ing it in a manner more easily differentiated by the human brain.

Intercom and other audio is not spatially processed, only the six
communications transceivers.

You must use stereo headsets, in stereo mode for this feature.

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This adjustment allows the six Spatial Audio inputs to be “relocated” on
any of nine (9) pre-defined “Head Related Transfer Function” (HTRF) lo­cations.

MultiTalker™ places the communications receiver audio in one of nine
apparent locations in the crew’s headset. This has been scientifically shown
to allow the brain to focus on multiple conversations and improve compre­hension for the listener.

Pressing the HRTF button toggles the PAC45 MultiTalker spatial function
on (receiver sources distributed) or off (receiver audio sources neutral).

Audio Location

The pilot panel can control the locations for the six receive audio locations.
Press and hold the HRTF button for > 1 second on the pilot’s panel until the
HRTF button and all COM nomenclature start blinking green.

Rotate the COM receive volume
knob so the pointer indicates the
approximate location of the desired
location. A voice announcement
will accompany the knob rotation
with the clock positions. Received
audio shall then be presented from
that location.

Press the HRTF button again to exit
the mode. The audio Controller will
remember last state through power
cycles.

Navaid Audio Selection

Navigation receivers are selected in the same manner
as the communication receiver, push on/push off the
knob associated with the desired navigational aid, and
rotate to adjust the receiver volume.

Telephone control

The volume control selector connects the audio con­troller to either a Bluetooth-enabled cell phone or a
wired cellular/satellite phone.

Push to pop out the volume control to select (answer or make
phone call) and adjust the receive audio volume.

To hear the ringer of the Bluetooth phone, the volume control
should be around the 12 o’clock position. Selecting the TEL
switch in the OUT position is not required.

Page 4 202-045-0100 July 2019 PAC45 Pilot Guide