PS Engineering PAC45 System With MultiTalker User manual

202-045-0200 Page 1 August 2017 PAC45 Pilot Guide
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 DUAL CONTROL HEAD SYSTEMS
202-045-0200 FAA-TSO C139a August 2017
PS Engineering, Inc. 2017 ©
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 prohibited. For further information contact the Publications
Manager at PS Engineering, Inc., 9800 Martel Road, Lenoir City, TN 37772. Phone [phone]

Page 2 202-045-0200 August 2017 PAC45 Pilot Guide
This pilot guide provides detailed operating instructions for the PS Engineer-
ing PAC45, Audio Selector Panel/Intercom Systems. Please read it carefully
before using the equipment so that you can take full advantage of its capabil-
ities. NOTE: Because of user customization of the labels, appearance may
differ from illustrations
PAC45 Pilot Operating Controls
PAC45 Copilot Operating Controls

202-045-0200 Page 3 August 2017 PAC45 Pilot Guide
CTL45P 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.
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 ste-
reo mode.
The power controls all audio selector panel functions, and intercom.
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.
The radio is automatically selected to receive in-
coming 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. The pilot and copilot controllers can select
any of the installed transceivers. In the case where both have selected the
same radio for transmission, the pilot will have priority when he uses the ra-
dio push to talk.
COM Audio Selector
The communications receiver
audio sources are controlled by
a combination push on-push-off
switch/volume control. Com-
munication 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 indicat-
ed by both knob position and the green nomenclature text.

Page 4 202-045-0200 August 2017 PAC45 Pilot Guide
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.
Swap Function
If an optional remotely-mounted button is switched to ground, the transmit
selection will increment from the current selection to the next transceiver
that is selected for receive (knob out). Successive activation of the SWAP
button increments to the next selected transceiver.
Because the rotary transmit selector (XMT) is no longer valid, the selected
transceiver legend flash at 2 Hz, while the indicator that the XMT selector
goes off. Moving the XMT selector to another selection cancels the SWAP
function.
Multi-Talker™ Head Related Transfer Function (HRTF)
Communication receiver audio signals are presented to the DSP and pro-
cessed to “appear” in a different location to the crew. “Multi-Talker” (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 fea-
ture.
Multi-Talker® 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 compre-
hension for the listener.
Pressing the HRTF button toggles the PAC45 Multi-Talker spatial function
on (receiver sources distributed) or off (receiver audio sources neutral). The
HRTF button on the pilot and copilot panels control the function for the
user of that panel.
Audio Location
This adjustment allows the
six Spatial Audio inputs to
be “relocated” on any of
nine (9) pre-defined “Head
Related Transfer Func-
tion” (HTRF) locations.
The pilot panel can control
the locations for the six re-
ceive audio locations for all
users. Press and hold the

202-045-0200 Page 5 August 2017 PAC45 Pilot Guide
HRTF button for > 1 second on the pilot’s panel until the HRTF button and
all COM nomenclature start blinking green.
Rotate the desired 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 will
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 control-
ler 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. This
knob must be out to use the telephone function.
To hear the ringer of the Bluetooth phone, the volume con-
trol should be around the 12 o’clock position. Selecting the
TEL switch in the OUT position is not required.
Intercom Operation
IntelliVox® Intercom VOX-Squelch
No adjustment of the IntelliVox® squelch control is necessary. Through
three individual signal processors, the ambient noise appearing in all six
microphones is constantly being sampled. Non-voice signals are blocked.
When someone speaks, only their microphone circuit opens, placing their
voice on the intercom.
The system is designed to block continuous tones; therefore people hum-
ming or whistling in monotone may be blocked after a few moments.
For consistent performance, any headset microphone must be placed within
¼-inch of your lips, preferably against them. (ref: RTCA/DO-214A,
§1.3.1.1 (a)).

Page 6 202-045-0200 August 2017 PAC45 Pilot Guide
NOTE
It is also a good idea to keep the microphone out of a direct wind path.
Moving your head through a vent air stream may cause the IntelliVox® to
open momentarily. This is normal.
The IntelliVox® is designed to work with normal aircraft cabin noise levels
(70 dB and above). It loves aircraft noise! Therefore, it may not recognize
speech and clip syllables in a quiet cabin, such as in the hangar, or without
the engine running. This is normal.
For optimum microphone performance, PS Engineering recommends instal-
lation of a Microphone Muff Kit from Oregon Aero (1-800-888-6910). This
will not only optimize VOX performance, but will improve the overall clar-
ity of all your communications.
Push to talk intercom (PTT ICS)
Pressing the intercom volume knob (ICS VOL) will place the system into
the Push-to-talk (PTT for Intercom use) mode. This will disable the voice
activation (VOX) and require that the external push to talk intercom buttons
for each position be used to speak on the intercom.
Push the knob again and the systems toggles back to
voice activation. The mode is shown by the green indica-
tion in the text.
Intercom Volume Control
The intercom volume control knob adjusts the loudness
of the intercom for the intercom stations(s) connected to
the audio controller panel. It has no effect on selected
radio levels, or music input levels.
In 2-control panel installation, the pilot panel controls pilot intercom vol-
ume only, copilot panel controls copilot and passenger intercom volume.
Monaural headsets
The pilot and copilot positions work with stereo or mono headsets. Howev-
er, Multi-Talker will not be presented correctly unless stereo headsets are
used, and oriented correctly on the head, left and right.
NOTE: For the full effect of Multi-Talker® Dimensional Sound, stereo
headsets must be used, and the left/right orientation observed.
All passenger headsets are connected in parallel. Therefore, if a monaural
headset is plugged in to a PAC45 Stereo installation, one channel will be
shorted. Although no damage to the unit will occur, all passengers with
stereo headsets will not hear one channel, unless they switch to the
“MONO” mode on their headset.

202-045-0200 Page 7 August 2017 PAC45 Pilot Guide
NOTE: Mono headsets that short the tip and ring (i.e. older models) will
introduce some audio distortion when used. Modern, stereo headsets are
recommended in all positions.
Intercom Modes
The “ICS” pushbutton switch on the panel provides
the selection of the intercom modes
The intercom mode defaults to “ALL” at power up. Then the button cycles
through the intercom modes, from top to bottom, then bottom to top as:
ISO, ALL CRW and CRW, ALL, ISO. A green indicator shows which
mode is currently active.
ISO: The pilot or copilot that has selected ISO is isolated fr om the in-
tercom and is connected only to the aircraft radio system. He will hear the
aircraft radio reception (and sidetone during radio transmissions). The other
crew member (unless they have also selected ISO) and passengers will have
radios, intercom and music.
ALL: All par ties will hear the air cr aft r adio, intercom and music.
During any radio or intercom communications, the music volume automati-
cally decreases. The music volume increases gradually back to the original
level after communications have been completed.
Crew (CRW): Pilot and copilot are connected on one inter com channel
and have exclusive access to the aircraft radios. The passengers will be able
to talk to each other.
In addition, the following rules apply:
 System defaults to ALL-ALL at power up.
 Either panel can select ISO, and be removed from intercom, while
the other remains with the passengers.
 Either panel can select CRW, and place both panels in Crew mode
 Either panel can select ALL and add everybody to the intercom
and radio
Remote ICS Mode Control
An optional external switch can act as a remote intercom mode selector.
Pressing the switch will increment the intercom mode selector from ISO-
ALL-CRW-ISO-ALL, etc. each time the button is pressed.
Bluetooth® connection
The PAC45 has an internal Bluetooth module, no external boxes required.
The audio controller is always “discoverable,” so you just need to search
for the PAC45 from your Bluetooth-equipped phone or music source. De-

Page 8 202-045-0200 August 2017 PAC45 Pilot Guide
fault access code is not required. Once the PAC45 has been “paired” with
your Bluetooth device, the TEL distribution will act as described below.
Pairing Bluetooth® devices
The PAC45 can be paired with up to eight individual devices, but will only
connect to one at a time. When that number is exceeded, the
PAC45 will drop a device to allow the new device to be add-
ed.
If the audio controller is turned on before the Bluetooth de-
vice, you will have to manually connect from your Bluetooth
device. Otherwise once paired, the audio controller should
connect automatically.
Hint, if your devices are not recognized by the PAC45, you may need to
reset the Bluetooth module, Press and hold HRTF and ICS buttons for more
than three (>3) seconds.
Bluetooth® Telephone Mode
The PAC45 serves as a full duplex interface for telephone systems such as
portable cellular phones with Bluetooth connectivity.
Warning: United States FCC Regulations contained in 47 CFR § 22.925
currently contain prohibition on airborne operation of cellular telephones.
“Cellular telephones installed in or carried aboard airplanes, balloons or
any other type of aircraft must not be operated while such aircraft are air-
borne (not touching the ground). When any aircraft leaves the ground, all
cellular telephones on board that aircraft must be turned off.”
To answer an incoming call, or initiate a call from the PAC45, select the
TEL volume control to the out position. The telephone audio will be con-
nected to the users who have selected the TEL knob associated with their
panel, such as the copilot or observer stations.
In installations with two control heads:
 If the two controls are Pilot and copilot, each station will select TEL on
their associated CTL45P
 If this is Pilot/Copilot (CTL45P) plus Mission Observer (CTL45M)
configuration, the Crew CTL45P TEL provides access to the pilot and
copilot, and the CTL45M TEL knob connects the Observer (and any
passengers) to the telephone.
 Intercom modes CRW and ISO will be available for the station NOT
on the phone.
NOTE
PS Engineering does not guarantee compatibility with personal cellular
telephones.

202-045-0200 Page 9 August 2017 PAC45 Pilot Guide
Bluetooth Reset
if the Bluetooth stops connecting to a device, or operates
incorrectly first try turning Bluetooth off, and back on from
your device. If also me be necessary to reset the Bluetooth module,
clearing out the connected devices. Press HRTF and ICS for more
than three seconds. This may be necessary if the Bluetooth
stops connecting to a device, or operated incorrectly.
Wired Satcom/Cell Phone input
The PAC45 can accommodate a wired telephone input as well as a Blue-
tooth connection. This operates the same as the Bluetooth Telephone .
Alert Audio
The PAC45 incorporates an independent alert audio system that can store
three audio messages recorded by the user, and played back when triggered
by an external source.
Once triggered, the alert audio will continue until the ACK button (front
panel or external) is pushed, or the trigger input returns to normal.
The alert inputs are ignored for the first 60 seconds after power is
applied, to reduce nuisance alerts during startup.
Alerts are provided to the pilot in fail safe, if the audio systems’
alert power is connected, and a stereo headset is used.
Storing Alert Audio
The PAC45 system can store three audio alerts. You must record all
three when the unit is in audio program mode. You cannot change only one
at a time. If you wish to replace just one message, we recommend you write
down all the messages before starting the procedure.
To record messages from the pilot’s headset:
1. Press & Hold “ACK” until a chime is heard in the headset, and then
release the button.
2. COM1 will blink, to indicate the recording of ALERT #1.
3. Start speaking message.
4. When finished with Alert #1, press the “ACK”.
5. Now COM2 will blink, to indicate the recording of ALERT #2.
6. Speak message.

Page 10 202-045-0200 August 2017 PAC45 Pilot Guide
7. When finished with Alert #2, press the “ACK”
8. Now COM3 blinks, to indicate the recording of ALERT #3.
9. Speak message.
10. When finished with Alert #3, press the “ACK”
11. A chime indicates that recording is now finished.
NOTE: If ACK is not pressed to indicate end of recording, it will record for
five seconds, and then advance to next alert. After all three time slots are
timed out, the PAC45 will exit the alert recording mode.
Stereo Helmet Conversion
For optimum performance, and for any effective Head Related Transfer
Function, stereo headphones must be used.
Several companies modify flight helmets to add stereo capability, and
change the microphone to high impedance civil aviation if it is military, or
low impedance.
Companies Include:
acousticom
Phone: [phone]
www.acousticom.com
FLIGHTHELMET.COM
Phone: [phone]
www.FlightHelmet.com
Headsets Inc.
Phone: [phone]
www.headsetsinc.com

202-045-0200 Page 11 August 2017 PAC45 Pilot Guide
Subject Index Page
Audio Alerts
Storing Alert Audio
9
Audio Location (HRTF) 4
Bluetooth® connection
Bluetooth Reset
Bluetooth® Telephone Mode
Pairing and unpairing Bluetooth devices
Pairing separate music and telephone devices
7
COM Audio Selector 3
Communications Transmit (XMT) Selection 3
IntelliVox® Intercom VOX-Squelch 4
Intercom Modes 6
Intercom Operation 4
Intercom Volume Control 5
Monaural headsets 6
Multi-Talker™ Head Related Transfer Function (HRTF) 3
Navaid Audio Selection 4
Power and Fail Safe 2
Push to talk intercom (PTT ICS) 5
Remote ICS Mode Control 7
Single Unit/Control Head 6
Telephone control 4
Wired Satcom/Cell Phone input 8

Page 12 202-045-0200 August 2017 PAC45 Pilot Guide
PS Engineering, Inc. 2017 ©
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 prohibited. For further information contact the Publications Manager at PS Engineering, Inc., 9800 Martel Road, Lenoir
City, TN 37772. Phone [phone]
Warranty & Service
In order for the factory warranty to be valid, the installations in a certified aircraft must be accom-
plished by an FAA-(or other ICAO agency) certified avionics shop and authorized PS Engineering
dealer. If the unit is being installed by a non-certified individual in an experimental aircraft, a
factory-made intercom harness must be used for the warranty to be valid.
PS Engineering, Inc. warrants this product to be free from defect in material and workmanship for
a period of two (2) years from the date of retail sale by authorized PS Engineering dealer. During
the first twelve (12) months of the two-year warranty period, PS Engineering, Inc., at its option,
will send a replacement unit at our expense if the unit should be determined to be defective after
consultation with a factory technician. For the remaining twelve (12) months of the two-year war-
ranty period, PS Engineering will send a no-cost replacement unit at customer shipping expense.
All transportation charges for returning the defective units are the responsibility of the purchaser.
All domestic transportation charges for returning the exchange or repaired unit to the purchaser
will be borne by PS Engineering, Inc. The risk of loss or damage to the product is borne by the
party making the shipment, unless the purchaser requests a specific method of shipment. In this
case, the purchaser assumes the risk of loss.
This warranty is not transferable. Any implied warranties expire at the expiration date of this war-
ranty. PS Engineering SHALL NOT BE LIABLE FOR INCIDENTAL OR CONSEQUENTIAL
DAMAGES. This warranty does not cover a defect that has resulted from improper handling,
storage or preservation, or unreasonable use or maintenance as determined by us. This warranty is
void if there is any attempt to dissemble this product without factory authorization. This warranty
gives you specific legal rights, and you may also have other rights, which may vary from state to
state. Some states do not allow the exclusion of limitation of incidental or consequential damages,
so the above limitation or exclusions may not apply to you.
All items repaired or replaced under this warranty are warranted for the remainder of the original
warranty period. PS Engineering, Inc. reserves the rights to make modifications or improvements
to the product without obligation to perform like modifications or improvements to previously
manufactured products.
Factory Service
The units are covered by a two-year limited warranty. See warranty information. Call PS Engineer-
ing, Inc. at [phone] before you return any unit. This will allow the service technician to
provide any other suggestions for identifying the problem and recommend possible solutions.
After discussing the problem with the technician and you obtain a Return Authorization Number,
ship product to:
PS Engineering, Inc.
Attn: Service Department
9800 Martel Rd.
Lenoir City, TN 37772
[phone] FAX [phone]
Email: [e-mail]
Units that arrive without an RMA number, or telephone number for a responsible
contact, will be returned un-repaired. PS Engineering is not responsible for items
sent via US Mail.