PS Engineering PAR100EX User guide

9800 Martel Road
Lenoir City, TN 37772
www.ps-engineering.com
P
PA AR R1 10 00 0E EX X
Document P/N 200-760-0000
Revision 11, Feb. 2013
Audio Selector Panel with VHF Communications Transceiver and
High-fidelity Stereo Intercom
System Installation and Operation Manual
Patented under one or more of the following;
No. 4,941,187; 5,903,227; 6,160,496 and 6,493,450
PS Engineering, Inc. 2012 ©
Copyright Notice
Any reproduction or retransmittal of this publication, or any portion thereof, without the expressed written permission of PS Engi-
neering, Inc. is strictly prohibited. For further information contact the Publications Manager at PS Engineering, Inc., 9800 Martel
Road, Lenoir City, TN 37772. Phone [phone], email [e-mail].
For use in Experimental/LSA/Non-certified aircraft ONLY
Not intended for installation in aircraft with standard airworthiness certification
The product warranty is not valid unless this product is installed by an
Authorized PS Eng
i
neering dealer.

Table of Contents
Section I – GENERAL INFORMATION................................1-1
1.1 INTRODUCTION...................................................................................................................... 1-1
1.2 SCOPE ....................................................................................................................................... 1-1
1.3 EQUIPMENT DESCRIPTION ................................................................................................. 1-1
1.4 APPROVAL BASIS — NONE................................................................................................... 1-2
1.5 SPECIFICATIONS.................................................................................................................... 1-2
1.6 EQUIPMENT SUPPLIED......................................................................................................... 1-3
1.7 EQUIPMENT REQUIRED BUT NOT SUPPLIED .................................................................. 1-3
1.8 LICENSE REQUIREMENTS ................................................................................................... 1-4
Section II - INSTALLATION........................................2-1
2.1 GENERAL INFORMATION .................................................................................................... 2-1
2.1.1 SCOPE........................................................................................................................ 2-1
2.1.2 CERTIFICATION REQUIREMENTS................................................................................... 2-1
2.2 UNPACKING AND PRELIMINARY INSPECTION ............................................................................... 2-1
2.3 EQUIPMENT INSTALLATION PROCEDURES ................................................................................... 2-1
2.3.1 COOLING REQUIREMENTS............................................................................................ 2-1
2.3.2 MOUNTING REQUIREMENTS......................................................................................... 2-1
2.3.3 MICRO AIR M760REM MOUNTING REQUIREMENTS ..................................................... 2-1
2.3.4 AUDIO PANEL MOUNTING RACK INSTALLATION........................................................... 2-2
2.4 CABLE HARNESS WIRING ............................................................................................................ 2-2
2.4.1 NOISE .......................................................................................................................... 2-2
2.4.2 AUDIO PANEL TRAY AND CONNECTOR ASSEMBLY....................................................... 2-3
2.4.3 INPUT POWER (+12VDC)................................................................................... 2-3
2.4.4 COMMUNICATIONS PUSH-TO-TALK.............................................................................. 2-4
2.4.5 AUDIO PANEL INTERFACE ............................................................................................ 2-4
2.5 M760REM VHF COM INTERFACE ............................................................................................ 2-4
2.5.1 M760REM CONNECTOR.............................................................................................. 2-4
2.5.2 INTERFACING THE M760REM AS SINGLE, COM 1 OR COM 2...................................... 2-4
2.5.3 R760REM ANTENNA CONNECTION.............................................................................. 2-5
2.6 TELEPHONE (DUPLEX) FUNCTION FOR BLUETOOTH ® CAPABLE CELL PHONES...................... 2-6
2.6.1 PARING SEPARATE MUSIC AND TELEPHONE DEVICES .................................................... 2-6
2.6.2 TELEPHONE SIDETONE ................................................................................................. 2-7
2.6.3 "SWAP" MODE ............................................................................................................. 2-7
2.6.4 BACKLIGHTING ............................................................................................................ 2-7
2.6.5 UNSWITCHED INPUTS ................................................................................................... 2-7
2.7 INTERCOM WIRING ...................................................................................................................... 2-8
2.7.1 ENTERTAINMENT INPUTS ............................................................................................. 2-8
2.7.2 ENTERTAINMENT MUTING............................................................................................ 2-8
2.8 DISASSEMBLY .............................................................................................................................. 2-9
2.9 CONVERSION TO 12V ELECTRICAL SYSTEM................................................................................. 2-9
2.10 ADJUSTMENTS ......................................................................................................................... 2-11
2.11 MICROPHONE GAIN REDUCTION .............................................................................................. 2-12
2.12 REASSEMBLY........................................................................................................................... 2-14
2.13 COMMUNICATIONS ANTENNA INSTALLATION NOTES .............................................................. 2-15
2.13.1 METAL SKIN AIRCRAFT............................................................................................ 2-15
2.13.2 NON-METAL SKIN AIRFRAMES......................................................................... 2-15
2.13.3 ANTENNA LOCATION ............................................................................................... 2-16
2.14 M760REM ADJUSTMENTS ...................................................................................................... 2-16
2.14.1 INSTALLATION OF FERRITE CORE SUPPRESSOR. ....................................................... 2-17

PS Engineering Inc. ®
PAR100EX Audio Selector Panel and Intercom System
Installation and Operator’s Manual
200-760-0000 Page ii Rev. 11, Feb. 2013
2.15 PAR100EX PIN ASSIGNMENTS ................................................................................................ 2-18
2.16 POST INSTALLATION CHECKOUT ............................................................................................. 2-19
2.17 UNIT INSTALLATION ................................................................................................................ 2-19
2.18 OPERATIONAL CHECKOUT ...................................................................................................... 2-19
2.18.1 M760REM CHECKOUT............................................................................................ 2-20
2.18.2 TELEPHONE CHECKOUT ....................................................................................... 2-20
2.19 FINAL INSPECTION................................................................................................................... 2-20
Section III OPERATION............................................3-1
3.1 SCOPE ....................................................................................................................................... 3-1
3.2 POWER AND FAIL SAFE (1)........................................................................................................... 3-1
3.2.1 ICS AND MUSIC VOLUME CONTROLS (1) ..................................................................... 3-1
3.2.2 M760REM RADIO POWER (AS COM 1)........................................................................ 3-1
3.3 COMMUNICATIONS TRANSMIT (XMT) SELECTION (2) ................................................................ 3-2
3.4 COM AUDIO SELECTOR (3) ........................................................................................................ 3-2
3.5 NAVAID AUDIO SELECTION (4)..................................................................................................... 3-2
3.6 VHF TRANSCEIVER CONTROL (5)................................................................................................ 3-3
3.6.1 FREQUENCY SELECTION (6) ......................................................................................... 3-3
3.6.2 RADIO VOLUME AND RADIO SQUELCH (7).................................................................... 3-3
3.6.3 MONITOR MODE (COM 1 OR STAND ALONE ONLY) ...................................................... 3-3
3.7 INTERCOM OPERATION (8).......................................................................................................... 3-4
3.7.1 INTELLIVOX® VOX-SQUELCH...................................................................................... 3-4
3.7.2 MONO HEADSETS IN STEREO INSTALLATION ................................................................ 3-5
3.7.3 INTERCOM MODES (8) ................................................................................................. 3-5
3.8 TELEPHONE MODE...................................................................................................................... 3-5
3.8.1 BLUETOOTH TELEPHONE CONNECTION........................................................................ 3-5
3.8.2 TELEPHONE (TEL) OPERATION.................................................................................... 3-6
3.9 ENTERTAINMENT INPUTS ............................................................................................................ 3-6
3.10 MUSIC MUTING (9).................................................................................................................... 3-7
3.10.1 MUSIC 2 MUTE CONTROL .......................................................................................... 3-7
3.10.2 LIQUID CRYSTAL DISPLAY CONTROL ......................................................................... 3-7
Section IV – Warranty and Service .........................................
4-1
4.1 WARRANTY ................................................................................................................................. 4-1
4.2 FACTORY SERVICE ...................................................................................................................... 4-1
Appendix A – External PTT Hook Up ................................................................. A
Appendix B – PAR100EX Installation Drawings ........................................................ B
Appendix C – J1 Connector Interconnect ................................................................. C
Appendix D – J2 Connector Interconnect ................................................................. D
Rev Date Change
1 3/28/2011 Initial release
2 May 2011 First production release
3 June 2011 Clarified radio operating voltage
4 July 2011 Added RFI filter information
5 August 2011 Changed as shipped voltage from 12 to 28V and added conversion instructions
6 January 2012 Corrected typos §2.9 & Appendix C
7 June 2012 Updated requirement for ferrite core RFI suppression §2.14.1
8 October 2012 Corrected §2.6.1, Cell Phone Sidetone
9 December 2012 Clarified Music 1 & Music 2, Muting, and Bluetooth operation.
10 December 2012 Corrections and clean-up
11 February 2013 Revised §2.10 for new cover with adjustment locations

PS Engineering Inc. ®
PAR100EX Audio Selector Panel and Intercom System
Installation and Operator’s Manual
200-760-0000 Page 1-1 Rev. 11, Feb. 2013
Section I – GENERAL INFORMATION
1.1 INTRODUCTION
The PAR100EX represents another evolutionary step in cockpit audio control and intercommunications
utility. Using our patented IntelliVox® design and pilot programmable configurations, this marks the next
level of audio control. The unit is designed for outstanding ergonomics and visually defined mode annun-
ciation and selection.
Before installing and/or using this product, please read this manual completely. This will ensure that you
will take full advantage of all the advanced features in the PAR100EX.
1.2 SCOPE
This manual provides detailed installation and operation instructions for the PS Engineering PAR100EX-
series of Audio Selector Panel/Intercom Systems. This includes the following unit:
Model Description PS Engineering
Part Number
PAR100EX Stereo Audio Selector Panel with control for VHF Commu-
nications radio. Includes stereo intercom, with Bluetooth
Interface
050-760-0100
M760REM VHF Communications Transceiver 050-760-6476
1.3 EQUIPMENT DESCRIPTION
The PAR100EX is a state-of-the-art audio isolation amplifier and audio selector that contains an auto-
matic voice activated (VOX) intercom system and serial data control/indication for a MiroAir VHF com-
munications receiver. It can switch two transceivers (Com 1, Com 2) and two receivers (Nav 1, Nav 2).
A Bluetooth ® TELEPHONE mode allows the PAR100EX to act as an audio interface between aircraft
headphone and microphones and Bluetooth enabled cellular telephone equipment. .
Warning: Use of non-aviation approved cellular telephone equipment may be prohibited by regulation.
PS Engineering is not responsible for unauthorized airborne use of cellular telephones.
For airborne use, the PAR100EX must be interfaced with an approved system.
There are four unswitched inputs, available for traffic or EGPWS, autopilot disconnect tones, and/or radar
altimeter warning.
Pushbutton switches select one of the communication transceivers for the pilot and copilot position, and
allows radio transmission. In "Split Mode" the PAR100EX has the ability to allow the pilot to transmit on
Com 1 while the copilot can transmit on Com 2. A fail-safe mode connects the pilot headphone and mi-
crophone to COM 1 if power is removed for any reason, or if the power switch is placed in the Off (Fail-
safe) position. Unswitched input #1 is also provided to the pilot headphone in fail-safe
A four-station voice activated (VOX) intercom is included in the PAR100EX. This system has PS Engi-
neering’s patented IntelliVox® circuitry that eliminates manual adjustments. The intercom system incor-
porates pilot isolate, all and crew modes, two independent stereo music inputs with "SoftMute™". Inter-
com volume control is through two concentric front panel knobs and a pushbutton intercom mode switch.
The small volume knob controls the intercom level for the pilot and copilot, while the large knob controls
the passenger intercom volume. Intercom squelch is automatic.
A concentric rotary data input knob on the right side of the unit controls less essential functions and con-
figurations.

PS Engineering Inc. ®
PAR100EX Audio Selector Panel and Intercom System
Installation and Operator’s Manual
200-760-0000 Page 1-2 Rev. 11, Feb. 2013
1.4 APPROVAL BASIS — NONE
The PAR100EX is not intended, or approved for installation on US Registered Civilian Aircraft with
normal airworthiness certificates.
1.5 SPECIFICATIONS
DIMENSIONS: Height: 1.3 in. (3.3 cm) Width: 6.25 in. (16.9 cm)
Depth behind panel 7.15 in. (18.16 cm)
WEIGHT
PAR100EX Unit
Rack with connectors
1.34 lb. (0.61 kg)
0.51 lb. (0.24 kg)
AUDIO PANEL POWER REQUIREMENTS (Including Internal Lighting):
Voltage: 12 VDC *The audio panel and Microair
M760REM operate from +12VDC Only If in-
stalled in 28V Aircraft, damage will result.
Contact PS Engineering if you wish to install
in 24V system.
Maximum Current: 2.5 Amp (Externally protected by a 3A pull-type
breaker)
Audio Selector Specifications
Audio selector panel input impedance: 510 
Input Isolation: -60 dB (min.)
Receiver Inputs: 4 (Com 1, Com 2, Aux 1, Aux 2)
Unswitched Inputs: 4
Transmitter Selections: 3 (Com 1, Com 2,
Com1/2)
Headphone Impedance: 150 – 1000 
Headphone Output: 38 mW each headset, no clipping <1% THD typi-
cal into 150
Microphone Impedance: 150 - 600 
Intercom Specifications
Intercom Positions: 4 places (with individual IntelliVox® circuits)
Music Inputs: 2, (Independent, Stereo)
Music Muting: >-30 dB "Soft Mute" when Com or intercom active.
Distortion: <1% THD @ 38 mW into 150
Mic Freq. Response, 3 dB: 300 Hz - 6000 Hz
Music Freq. Response, 3 dB: 10 Hz – 26 kHz
M760REM VHF Transceiver Specifications
Radio Type Amplitude Modulation (AM) Aircraft Transceiver
Channels (Transmit & receive) 760 channels, 25KHz spacing
118.000 – 136.975MHz
Frequency Selection On PAR100EX Audio Panel
Frequency Display Alpha/numeric LCD display (with backlighting) on
PAR100EX
Frequency control PLL frequency synthesis, which is microprocessor
controlled Memory is store in non-volatile EPROM
Power consumption Receive (no signal)
Transmit
140 mA (no backlighting)
1.9 A
Input Voltage Provided by PAR100EX from a second 3A Circuit
Breaker.
Power output 5 watts (nominal) VSWR Tolerance < 2:1 for best
operation (5:1 without damage)

PS Engineering Inc. ®
PAR100EX Audio Selector Panel and Intercom System
Installation and Operator’s Manual
200-760-0000 Page 1-3 Rev. 11, Feb. 2013
Receiver sensitivity -12dB SINAD @ 0.3µV (1KHz audio with 70%
modulation)
Receiver Selectivity -70dB
Squelch Range 0.5 - 10.0µV
Data Interface RS232
Speaker volume output Nominal 4 watts output to 4 ohms
Headset volume output Nominal 100 milliwatts output to 600 Ω
Temperature range -20 to +55 degrees Celsius
Stability < +/- 4.00 ppm
Dimensions W-3.4” x H-2.5” x D-4.7” (plus 1.5” for harness)
W-87mm xH-64mm x D-119mm (plus 35mm for
harness)
Weight 13.0 ounces
338 grams
FCC ID: QNEM760REM
1.6 EQUIPMENT SUPPLIED
1 ea. of the following items:
Model Description Part Number
PAR100EX PAR100EX Audio Panel with intercom and radio function control
050-760-0100
M760REM VHF Communications Transceiver 050-760-6476
Installation Kit: 250-890-0000, containing:
Description Quantity Part Number
PAR100EX installation rack assembly 1 430-890-0040
PAR100EX Rack back plate 1 430-890-0050
44-pin connector kit 2 120-891-2045-
Backshell, connector 2 625-025-2465
Backshell Retainer 2 431-891-0100
4 40 X 7/16 screw w/nylon patch 4 475-440-0007
4 40 X 3/8 screw w/lock washer 4 475-440-1038
4 40 X 1/8 screw w/lock washer 2 475-440-0001
Solder Lug 2 475-009-0001
Cable Clamp 1 625-001-0002
#6-32 x ½” Flat head Philips screw 6 475-632-0012
#6-32 Clip Nut 6 475-630-0002
Installation Kit 250-760-6476, Containing:
Description Quantity Part Number
DB 15 Connector , Solder type 1 425-016-0001
DB 15 Connector back shell 1 425-015-0003
Ferrite RFI suppressor 1 507-000-0065
1.7 EQUIPMENT REQUIRED BUT NOT SUPPLIED
a. Circuit Breaker: 1 ea; 3 amp PULL TYPE REQUIRED for PAR100EX
b. Circuit Breaker: 1 ea; 3 amp PULL TYPE REQUIRED for transceiver power (to PAR100EX)
c. Headphone Jacks (up to 4 Stereo, as Required)
d. Microphone Jacks (up to 4 as Required)
e. Headphones, 150  (Stereo), up to 4 as required
f. Microphones, up to 4 as required
g. VHF Communication antenna 118-137 MHz, VSWR <2:1 (FAA-TSO approved is recommended)
h. BNC Connector for M760REM, Amphenol 31-2 or equivalent (PS PN 425-262-0312)
i. Mounting hardware for M760REM, as appropriate
j. Interconnect Wiring, coaxial cable

PS Engineering Inc. ®
PAR100EX Audio Selector Panel and Intercom System
Installation and Operator’s Manual
200-760-0000 Page 1-4 Rev. 11, Feb. 2013
1.8 LICENSE REQUIREMENTS
In some localities other than the United States, an Aircraft Radio Station license may be required. In the
United States, you do not need a license to operate a two-way VHF radio aboard aircraft operating domes-
tically. Aircraft operating domestically do not land in a foreign country or communicate via radio with
foreign ground stations. Flying in international or foreign airspace is permitted, so long as the previous
conditions are met. If you travel to a foreign destination, however, (e.g., Canada, Mexico, Bahamas, Brit-
ish Virgin Islands) a license is required. Visit http://wireless.fcc.gov for more information.

PS Engineering Inc. ®
PAR100EX Audio Selector Panel and Intercom System
Installation and Operator’s Manual
200-760-0000 Page 2-1 Rev. 11, Feb. 2013
Section II - INSTALLATION
2.1 GENERAL INFORMATION
2.1.1 SCOPE
This section provides detailed installation and interconnection instructions for the PS Engineering
PAR100EX Audio Selector Panel/Intercom/ with VHF communication radio controls.
Please read this manual carefully before beginning any installation to prevent damage and post-
installation problems. Installation of this equipment requires special tools and knowledge.
2.1.2 Certification Requirements
NOTE
The PAR100EX is not approved for installation in aircraft with a standard airworthiness certificate.
The M760REM is not intended for use where a FAA-Approved VHF Communications transceiver is re-
quired by operating rule.
2.2 Unpacking and Preliminary Inspection
Use care when unpacking the equipment. Inspect the units and parts supplied for visible signs of shipping
damage. Examine the unit for loose or broken buttons, bent knobs, etc. Verify the correct quantity of
components supplied with the list in Section 1.6 (B). If any claim is to be made, save the shipping mate-
rial and contact the freight carrier. Do NOT return units damaged in shipping to PS Engineering. If the
unit or accessories show any sign of external shipping damage, contact PS Engineering to arrange for a
replacement. Under no circumstances attempt to install a damaged unit in an aircraft. Equipment returned
to PS Engineering for any other reason should be shipped in the original PS Engineering packaging, or
other UPS approved packaging.
2.3 Equipment Installation Procedures
2.3.1 Cooling Requirements
Forced air-cooling of the PAR100EX is not required. However, the units should be kept away from heat
producing sources (i.e. defrost or heater ducts, dropping resistors, heat producing avionics) without ade-
quate cooling air provided.
2.3.2 Mounting Requirements
The PAR100EX must be rigidly mounted to the instrument panel of the aircraft structure, within view and
reach of the pilot position(s). The unit may be mounted in any area where adequate clearance for the unit
and associated wiring bundle exist.
To prevent noise, avoid installing the unit close to high current devices or systems with high-voltage pulse
type outputs, such as DME or transponders. Avoid running the interconnecting bundles near any high
current wires.
2.3.3 Micro Air M760REM mounting requirements
The M760REM remote VHF Communications radio is mounted to the aircraft structure with 4 ea #6-32
(not supplied) screws through the mounting flange. Guidance can be found in AC 43.13-2B, Chapter 2.

PS Engineering Inc. ®
PAR100EX Audio Selector Panel and Intercom System
Installation and Operator’s Manual
200-760-0000 Page 2-2 Rev. 11, Feb. 2013
Figure 2-1 M760REM VHF Transceiver (Remote Mount)
2.3.4 Audio Panel Mounting Rack Installation
Remove the unit from the mounting tray by unscrewing the 3/32" hex-head screw that is in the center of
the unit. Use caution to avoid hitting the photo-detector lens. Carefully slide the unit free of the tray. Set
the unit aside in a safe location until needed. Install the tray using six clip nuts (475-630-0002), and six
FHP 6-32 x ½" screws (475-632-0012). The audio selector panel must be supported at front and rear of
the mounting tray.
2.4 Cable Harness Wiring
Referring to the appropriate Appendix, assemble a wiring harness as required for the installation. All
wires must be MIL-SPEC in accordance with current regulations. Two- and three-conductor shielded wire
must be used where indicated, and be MIL-C-27500 or equivalent specification. Proper stripping, shield-
ing and soldering technique must be used at all times. It is imperative that correct wire be used.
Refer to FAA Advisory Circular 43.13-2B for more information. Failure to use correct techniques may
result in improper operation, electrical noise or unit failure. Damage caused by improper installation will
void the PS Engineering warranty.
2.4.1 Noise
Due to the variety and the high power of radio equipment often found in today's general aviation aircraft,
there is a potential for both radiated and conducted noise interference.
The PAR100EX power supply is specifically designed to reduce conducted electrical noise on the aircraft
power bus by at least 50dB. Although this is a large amount of attenuation, it may not eliminate all noise,
particularly if the amplitude of noise is very high. There must be at least 13.8 VDC present at the connec-
tor, J2 pins 8 & 9, of the PAR100EX for the power supply to work in its designed regulation. Otherwise, it
cannot adequately attenuate power line noise. Shielding can reduce or prevent radiated noise (i.e., beacon,
electric gyros, switching power supplies, etc.) However, installation combinations can occur where inter-
ference is possible. The PAR100EX was designed in a RFI hardened chassis and has internal Electro-
magnetic Interference (EMI) filters on all inputs and outputs.
Ground loop noise occurs when there are two or more ground paths for the same signal (i.e., airframe and
ground return wire). Large cyclic loads such as strobes, inverters, etc., can inject noise signals onto the
airframe that are detected by the audio system. Follow the wiring diagram very carefully to help ensure a
minimum of ground loop potential. Use only Mil Spec shielded wires (MIL-C-275000, or better). Under

PS Engineering Inc. ®
PAR100EX Audio Selector Panel and Intercom System
Installation and Operator’s Manual
200-760-0000 Page 2-3 Rev. 11, Feb. 2013
no circumstances combine a microphone and headphone wiring into the same shielded bundle. Always
use a 2- or 3-conductor, shield wire as shown on the installation-wiring diagram.
The shields can be daisy-chained together, and then connected to the ground lugs mounted on the center
of the back plate.
Radiated signals can be a factor when low level microphone signals are "bundled" with current carrying
power wires. Keep these cables physically separated. It is very important that you use insulated washers to
isolate the ground return path from the airframe to all headphone and microphone jacks.
2.4.1.1 Music Inputs and Noise
PAR100EX units utilize differential music inputs to help prevent noise from entering the music system.
This feature is usually transparent to the installer, however, it is important that the appropriate music sig-
nal and ground connections are made directly to the dedicated music signal and ground inputs on the
PAR100EX. The power for IFE and audio panel should be a common bus.
If a music jack is installed for Music 1 or 2, we strongly recommend isolating the jack from airframe
ground, by using an insulated mounting plate.
NOTE
Adding a high-performance audio control system, particularly in conjunction with high-performance ac-
tive noise canceling headsets, cannot improve on older avionics that were designed for cabin-speaker use.
PS Engineering makes no claim that the audio panel will provide a noise-free audio quality under all in-
stallation conditions, particularly with older avionics.
2.4.2 Audio Panel Tray and Connector Assembly
The rack connectors mate with two 44-pin connectors in the PAR100EX. The connectors are a sub-
miniature crimp-type, and require the use a hand crimp tool, from table below (or equiv.). The connectors
are mounted to the tray back plate with #4-40 screws (475-440-1038), from the inside of the tray and the
mounting block, 431-891-0100. Ensure that proper strain relief and chafing precautions are made during
wiring and installation, using the cable clamp (625-001-0002).
Manufacturer Crimping Tool Positioner Extraction tool
AMP 601966-1 601966-6 91067-1
Daniels AFM8 K42 M24308-1
ITT-Cannon 995-0001-584 995-0001-739 91067-1
Table 2-1 PAR100EX Connector Pin crimping tools
2.4.3 Input Power (+12VDC)
As shipped from PS Engineering, the PAR100EX is compatible with 28 Volt DC systems.
If 12-volt system operation is desired, see section 2.9.
NOTE:
If the PAR100EX/M760REM is installed in 28V aircraft without properly configuring the unit,
the M760REM will be damaged. See §2.9.
A three (3) Amp circuit breaker is required for all installations. Power and ground wires should be #22
connected to J2 Pins 8 and 9. Connect airframe ground to J2 Pin 10 and 11 only.
The PAR100EX internal regulator supplies DC power to the M760REM VHF transceiver (12 VDC), and
has a dedicated three (3) amp circuit breaker from aircraft bus input into J2, Pin 44 for this supply.

PS Engineering Inc. ®
PAR100EX Audio Selector Panel and Intercom System
Installation and Operator’s Manual
200-760-0000 Page 2-4 Rev. 11, Feb. 2013
2.4.4 Communications Push-to-Talk
An important part of the installation is the PTT (Push-To-Talk) switches that allow the use of your air-
craft communications radio for transmissions. There are three typical configurations that can be used.
Select the case that best fits the installation. Only the person who presses their PTT switch will be heard
over the radio. If the pilot and copilot both use the PTT, the only pilot position has access to the radio.
The pilot position will have PTT control regardless of the mic selector switch or copilot PTT when the
PAR100EX is in the OFF/EMG mode.
CASE I: PTT is built into both pilot and copilot yokes.
CASE II: PTT is in pilot yoke only. This configuration requires a modified external PTT switch plugged
into the copilot's microphone jack. (See Appendix A). When the copilot's PTT is pressed, the intercom
switches the microphone audio from pilot to copilot mic.
CASE III: No built in PTT. This requires two built in PTTs to be installed, or modified external PTT
switches to be used. Modify external PTT as required. See Appendix A.
2.4.5 Audio Panel interface
The PAR100EX is designed to interface with standard aircraft avionics, and presents a 500  receiver
impedance. For best results, a twisted-shielded cable is recommended from the avionics audio source to
the audio panel, with the shield grounded at the audio panel end.
Inputs A1 and A2 can be used to control navigation receiver audio, J1 Pins 17 WRT 18 and J1 19 WRT
20, respectively.
Some avionics do not provide a separate audio low, and may introduce additional electrical noise into the
system. For best results, connect the audio low from the audio panel to the radio ground, using one con-
ductor of the twisted-shielded cable.
2.5 M760REM VHF COM Interface
2.5.1 M760REM Connector
The M760REM has a 15-pin solder type connector.
1 Mic Audio Hi
2 RS232 TX (data out)
3 No Connect
4 No Connect
5 RS232RX (data in)
6 No Connect
7 PTT
8 No Connect
9 Radio Power
10 No Connect
11 Aircraft Ground
12 No Connect
13 No Connect
14 COM audio Output Hi
15 No Connect
2.5.2 Interfacing the M760REM as Single, COM 1 or COM 2
The PAR100EX/ Microair M760REM can be configured to be a stand-alone COM, or as COM 1 or COM
2 in a multiple radio installation. In this case, PS Engineering recommends that the
PAR100EX/M760REM be used as COM 2. In the event of a failure, the PAR100EX will be in fail-safe,
and COM 1 can be used.

PS Engineering Inc. ®
PAR100EX Audio Selector Panel and Intercom System
Installation and Operator’s Manual
200-760-0000 Page 2-5 Rev. 11, Feb. 2013
If the M760REM is used as COM 1, the PAR100EX can fail-safe to it, because it is divided internally as
audio panel and COM control. In addition, the M760REM power supply is provided by an independent
circuit breaker and power supply in the PAR100EX. See § 3.2 for operational information.
The PAR100EX must be configured at installation to be used as COM 1 or COM 2, by removing the top
cover, and placing the DIP switches as shown in Figure §2-4.
COM 1 OFF J4 Switch 6
COM 2 ON
Table 2-2 Radio Selection
When properly selected, the PAR100EX LCD display will read either COM 1, or COM 2.
2.5.3 R760REM Antenna connection
The VHF Com radio uses a solder/crimp BNC connector, Amphenol 31-2. Assemble the RF connector as
shown:
Step 1 Place nut, washer and gasket over cable and strip jacket to 5/16” (7.9 mm).
3/32”
Step 2 Comb out braid and fold out. Trim insulation off center conductor to 3/32” (2.4 mm). Tin center
conductor.
Step 3 Pull braid wires forward and taper toward center conductor. Place clamp over braid and push back
against cable jacket.
Step 4 Fold back braid wires as shown, trim to proper length [approximately .1/8” (3.2mm) long] and
form over clamp as shown. Braid wire should not extend beyond step of braid clamp. Solder contact to
center conductor, sliding bushing first (when supplied) over center conductor.

PS Engineering Inc. ®
PAR100EX Audio Selector Panel and Intercom System
Installation and Operator’s Manual
200-760-0000 Page 2-6 Rev. 11, Feb. 2013
Step 5 Insert cable and parts into connector body. Make sure sharp edge of clamp seats properly in gas-
ket. Tighten nut to approximately 15 inch pounds.
2.6 TELEPHONE (Duplex) Function for Bluetooth ® capable Cell Phones
The TELEPHONE mode in the PAR100EX is also compatible with cellular telephones with Bluetooth®.
hands-free headset interface. There is no wiring required, all functions are handled in the Bluetooth tele-
phone.
The PAR100EX Bluetooth® interface is always “discoverable”, so you just need to search for the
PAR100EX from your Bluetooth-equipped phone or music source. The default access code is 0000, if
needed. Once the PAR100EX has been “paired” with your Bluetooth device.
The telephone is distribution as dictated by the ISO, ALL, CREW.
ISO mode - only the Pilot is on the telephone.
CREW mode - only the Pilot and Copilot are on the telephone.
ALL mode - everyone is on the telephone.
You can answer a call when you hear the “telephone ringing” in your headset. To answer the phone call
will require you to have access to your phone and selecting the answer function of that telephone. There is
no front panel button that will allow you to answer the phone.
2.6.1 Paring separate music and telephone devices
It is possible to use a different music source (iPad, iPod with Bluetooth adapter, Bluetooth enabled laptop,
etc) and telephone. However, the music source must be paired first, before the telephone, if the telephone
also has music streaming capability. Otherwise, the Smartphone will also take over the music streaming.
Only one can be a phone. If the telephone can provide both telephone and streaming music, when the
phone is connected, it will automatically disconnect the music device. If it is possible to turn off the music
streaming function on the telephone, then both the telephone and a separate Bluetooth® enabled music
device can be use at the same time.
If Bluetooth connections become unreliable or do not connect, you may need to reset the PAR100EX.
Turn the unit off, and hold the A1 & A2 buttons while turing the unit the unit back on. You should hear a
chime to indicate a successful Bluetooth reset.
NOTE
FCC Regulations (47 CFR 22.925) prohibit airborne operation of cellular phones;
Cellular telephones installed in or carried aboard airplanes, balloons or any other type of aircraft must not
be operated while such aircraft are airborne (not touching the ground). When any aircraft leaves the
ground, all cellular telephones on board that aircraft must be turned off. The use of cellular telephones
while aircraft is on the ground is subject to FAA regulations.
FAA Regulation 14 CFR 91.21(5) allows for use of portable electronic devices that the operator of the
aircraft has determined will not cause interference with the navigation or communication system of the
aircraft on which it is to be used.
PS Engineering, Inc. does not endorse using unapproved cellular telephone equipment in flight, and takes
no responsibility for the user’s action. PS Engineering does not guarantee compatibility with personal
cellular telephones. For a list of phones that have been tested, visit www.ps-engineering.com.

PS Engineering Inc. ®
PAR100EX Audio Selector Panel and Intercom System
Installation and Operator’s Manual
200-760-0000 Page 2-7 Rev. 11, Feb. 2013
2.6.2 Telephone sidetone
The PAR1000EX will provide cell phone sidetone (your side of the telephone conversation) in the factory
configuration. Some telephones do provide sidetone the PAR100EX can be configured to remove this side-
tone by placing the DIP switch in the proper configuration.
Cell phone sidetone created by
audio panel
OFF J5 Switch 6
No cell phone sidetone ON
Table 2-3 Telephone sidetone switch
2.6.3 "Swap" Mode
When a momentary, normally open, push-button switch is connected between pin 20 on the J2 connector
and aircraft ground, the user can switch between Com 1 and 2 by depressing this switch without having to
turn the mic selector switch. This yoke-mounted switch eliminates the need to remove your hands from
the yoke to change transceivers.
2.6.4 Backlighting
The PAR100EX has an automatic dimming of the pushbutton annunciation LEDs controlled by a photo-
cell. Control of the unit backlighting is through the aircraft avionics dimmer. For 12-Volt aircraft, connect
J2 Pins 6 and 7 to the aircraft dimmer bus, and pin 5 to ground.
As shipped from PS Engineering, the PAR100EX is ONLY compatible with 12 Volt DC systems. Contact
PS Engineering at 1.865.988.9800 or [e-mail] if 24V operation is desired. For 24-
volt backlighting systems, connect pin 7 to the aircraft dimmer, and pins 5 and 6 to ground.
NOTE:
If the PAR100EX/M760REM is installed in 28V aircraft without properly configuring the unit,
the M760REM radio will be damaged. See § 2.9
The LCD display backlighting is controlled by the automatic photocell dimming. In addition, the text in-
verts for nighttime mode when the ambient light is low.
If an external dimmer control is not used, a constant back light illumination can be established for night-
time viewing. Pin 6 or 7 (depending on system voltage) must be tied to power (J2, pin 8 or 9) for the back
lighting system to work. The photocell mounted in the unit face will automatically adjust the intensity of
the push-button annunciation LEDs.
2.6.5 Unswitched inputs
J1, pins 31, 29 and J2 pin 15 are unswitched, unmuted (by transmitter keying), inputs # 1, 3 and 4, re-
spectively. These inputs are presented to the pilot and copilot regardless of the audio configuration, and
will mute the entertainment inputs based on the mode. These 510 Ω inputs can be used for altimeter DH
audio, GPS waypoint audio, autopilot disconnect tones, or any other critical audio signal. Unswitched #1
is always presented to the crew headphones, and is available to the pilot in fail-safe (off) mode.
Unswitched 3 and 4 inputs are always presented to the crew headphones.
Unswitched
Input
Hear in
Fail Safe
Hear in
Crew Headset
Gain
1 Yes Yes 1:1(fixed)
2 No Yes 1:1(fixed)
3 No Yes Adjustable
4 No Yes 1:1(fixed)
Table 2-4 Unswitched input table

PS Engineering Inc. ®
PAR100EX Audio Selector Panel and Intercom System
Installation and Operator’s Manual
200-760-0000 Page 2-8 Rev. 11, Feb. 2013
J1, pins 31, 29 and J2 pin 15 are unswitched, unmuted inputs # 1, 3 and 4, respectively. These inputs are
presented to the pilot and copilot regardless of the audio configuration, and will always mute the enter-
tainment inputs. These 510Ω inputs can be used for altimeter DH audio, GPS waypoint audio, autopilot
disconnect tones, or any other critical audio signal.
The audio low for unswitched #4 (J2, pin 15) should be connected to a convenient audio low. However,
this should NOT be connected to Music Low.
Unswitched #1 is presented to the pilot headphone in fail-safe (off) mode.
NOTE
Inputs 1, 2 and 4 are fixed (1:1), and any audio level adjustments must be made at the input source. Unswitched #3
has a variable adjustment control located on the bottom side of the unit. This control allows you to control the volume
level of that unswitched input from 50% to 200% of the input level. Refer to Adjustments section.
2.7 Intercom wiring
See Appendix C and D for intercom connection configurations. It is critical to the proper operation of this
system to have this connector wiring made in accordance with these diagrams. Use 2- and 3-conductor,
MIL-spec cable as shown. Connect the shields at the audio panel end only, and tie to the audio low inputs
as shown.
NOTE
The system harness can be custom made by PS Engineering, Inc. Simply call the factory or www.ps-
engineering.com to obtain a wire harness work sheet. The harness will be made to your specifications and
fully functionally tested. Harness can be ordered with jack, or without the intercom jacks installed, for
easier wire routing through the aircraft.
2.7.1 Entertainment Inputs
The PAR100EX has two INDEPENDENT inputs wired into the rear connectors, in addition to the Blue-
tooth® music streaming (which is presented as Music 1). Entertainment input number 1 is J2 pins 23 (left
channel) and 24 (right channel), with respect to pin 25, and Entertainment number 2 is connected to 26
(left channel), 27 (right channel), with respect to 28.
Music #1 is available to the pilot and copilot positions, only, in normal configuration. Music 1 can be hear
by all aircraft occupants, if Music 1 all headsets is activated. See §2.7.1.1
Music 2 is only heard by the passengers.
See § 3.9 for music distribution information.
NOTE
Use th e low level output of an y addi tion al en ter tain ment device to conn ect to the au-
dio pan el. Maximum si gnal level i s 3 VAC p-p. DO NOT use a speaker-l evel output,
th is wi ll cause in ter na l damage in th e audio pan el.
2.7.1.1 Music 1 all headsets (J2, Pin 22)
If J2, Pin 22 is connected to aircraft ground, Music 1 will also be heard in the passengers’ headsets. Music
2 will be disabled when J2, Pin 22 is grounded.
2.7.2 Entertainment muting
The PAR100EX-system incorporates a "Soft Mute™" system. This will mute the entertainment devices
during intercom conversation or radio reception. The four muting modes are controlled by the front panel
“Mute” button. See §3.9 for more information.
CAUTION
Local oscillators and internal signals from entertainment equipment can cause undesired interference with
other aircraft systems. Before takeoff, operate the entertainment devices to determine if there is any ad-
verse effect within the aircraft systems. If any unusual operation is noted in flight, immediately switch off
the entertainment devices.

PS Engineering Inc. ®
PAR100EX Audio Selector Panel and Intercom System
Installation and Operator’s Manual
200-760-0000 Page 2-9 Rev. 11, Feb. 2013
All entertainment devices must be switched off for both takeoff and landing.
2.7.2.1 Entertainment 2 Mute (J2 Pin 13 & 14)
Connecting J2 pin 13 to pin 14 (or ground) through a SPST switch places the entertainment #2 music
source into the Karaoke Mode. In this mode, incoming music and intercom conversation will not mute the
music for the passengers’ intercom net. This allows uninterrupted music during casual conversation.
2.8 Disassembly
Remove the top cover, by removing five (5) Phillips head screws from the PAR100EX top.
NOTE: THE SCREW IN THE REAR OF THE PANEL IS A DIFFERENT LENGTH THAN THE
OTHER FOUR. YOU MUST PUT THE SHORTER LENGTH SCREW BACK IN THE SAME
LOCATION OR DAMAGE WILL OCCUR. See Figure #2-2.
There is a spacer on the screw on the front right corner that will fall out. Save and retain for later.
Figure 2-2 Screw Location and disassembly
2.9 Conversion to 12V electrical system.
As shipped from PS Engineering, the PAR100EX is configured to operate in 24 aircraft. This protects the
M760REM from damage if installed in 24 volt aircraft.
If operation in a 12-volt aircraft is desired, internal jumpers must be changed to allow operation of the
M760REM. Disassemble the unit as described in §2.8.
1. The operating voltage is configured with selection jumpers located in the back corner near the
left sub-D connector. See Figure #2.
Long screws
Short screw

PS Engineering Inc. ®
PAR100EX Audio Selector Panel and Intercom System
Installation and Operator’s Manual
200-760-0000 Page 2-10 Rev. 11, Feb. 2013
Figure #2
Jumpers in 24V location

PS Engineering Inc. ®
PAR100EX Audio Selector Panel and Intercom System
Installation and Operator’s Manual
200-760-0000 Page 2-11 Rev. 11, Feb. 2013
2. Relocate the red jumpers so it matches the picture below.
Jumpers set for 12 V Operation Jumpers set for 24V operation
Jumpers set for 12V operation Jumpers set for 24V operation
2.10 Adjustments
The PAR100EX is factory adjusted to accommodate the typical requirements for most aircraft configura-
tions. There are three adjustments accessible through the top cover (see §2.8) that allow the installer to
fine tune the specific functions.
 Unswitched Input 3 Volume (US3), adjust from 50% to 200% of input value. Turn counterclock-
wise to increase gain.

PS Engineering Inc. ®
PAR100EX Audio Selector Panel and Intercom System
Installation and Operator’s Manual
200-760-0000 Page 2-12 Rev. 11, Feb. 2013
 TEL VOL- The received telephone volume. The unit is set at the factory for 75% of volume. Turn
Clockwise to increase the TEL receive volume.
 LCD CST: adjusts display contrast to suit individual preferences and ambient light.
Figure 2-3 PAR100EX Cover adjustment locations
2.11 Microphone gain reduction
For installations in very noisy aircraft, a reduction in the intercom microphone input gain may be desir-
able. The PAR100EX has two DIP switches located on the main board that can switch the inputs to a
lower gain setting.
Remove the top cover (see §2.8), and locate the two DIP switches near the mounting rod at the rear of the
unit.
Unswitched 3
LCD Contrast
3
TEL VOL

PS Engineering Inc. ®
PAR100EX Audio Selector Panel and Intercom System
Installation and Operator’s Manual
200-760-0000 Page 2-13 Rev. 11, Feb. 2013
Figure 2-4 – PAR100EX DIP Switches
Figure 2-5 DIP switches
Change the settings as shown in the table below.
Switch Noisy Cockpit Normal Cockpit Switch Bank
Pilot Microphone
1 OFF ON
2 ON OFF
Copilot Microphone
3 OFF ON
J5
4 ON OFF
Passenger 1 Microphone
1 OFF ON
2 ON OFF
Passenger 2 Microphone
3 OFF ON
J4
4 ON OFF
Table 2-5 Microphone gain settings
1
2
3
4
5
6
ON
OFF ON
OFF
NOTE:
If top cover is removed
for ANY reason, you
MUST replace the cover
screws with the proper
length, otherwise damage
will result.
Shorter Screw
DIP Switches