PS Engineering PAR200B Guía del usuario

9800 Martel Road

Lenoir City, TN 37772

www.ps-engineering.com

PAR200B

With IntelliAudio®

Including Trig Avionics TY91 (L)

Document P/N 200-228-0300

October 2019

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. 2019 ©

Any reproduction or retransmittal of this publication, or any portion thereof, without the expressed written permission of PS En-

gineering, Inc. is strictly prohibited. For further information, contact the Publications Manager at PS Engineering, Inc., 9800

Martel Road, Lenoir City, TN 37772. Phone (865) 988-9800, email contact@ps-engineering.com.

FAA-TSO C139, TSO C169a (PARTIAL)

EASA ETSO C139, 2C169A (PARTIAL)

The product warranty is not valid unless this product is installed by an

Authorized PS Engineering dealer or is a direct replacement for a compatible

audio panel.

Table of Contents 
 Section I –GENERAL INFORMATION.................................1-1 
1 INTRODUCTION............................................................................................................................1-1 
2 SCOPE ..............................................................................................................................................1-1 
3 EQUIPMENT DESCRIPTION.......................................................................................................1-1 
4 APPROVAL BASIS —FAA TSO, EASA ETSO...........................................................................1-2 
1.1 PAR200B..........................................................................................................................1-2 
1.2 TRIG TY91-SERIES:..........................................................................................................1-2 
5 SPECIFICATIONS.......................................................................................................................... 1-2 
6 EQUIPMENT SUPPLIED............................................................................................................... 1-4 
7 EQUIPMENT REQUIRED BUT NOT SUPPLIED......................................................................1-4 
8 LICENSE REQUIREMENTS.........................................................................................................1-4 
 Section II - INSTALLATION .........................................2-1 
1 GENERAL INFORMATION..........................................................................................................2-1 
1.1 SCOPE..............................................................................................................................2-1 
1.2 CERTIFICATION REQUIREMENTS ......................................................................................2-1 
2 UNPACKING AND PRELIMINARY INSPECTION ..................................................................................2-1 
3 EQUIPMENT INSTALLATION PROCEDURES.......................................................................................2-1 
3.1 COOLING REQUIREMENTS ................................................................................................2-1 
3.2 MOUNTING REQUIREMENTS............................................................................................. 2-1 
3.3 TRIG TY91 MOUNTING REQUIREMENTS ...........................................................................2-2 
3.4 AUDIO PANEL MOUNTING RACK INSTALLATION.............................................................2-2 
4 CABLE HARNESS WIRING .................................................................................................................2-2 
4.1 NOISE................................................................................................................................2-2 
4.2 AUDIO PANEL TRAY AND CONNECTOR ASSEMBLY .........................................................2-3 
4.3 AUDIO PANEL INTERFACE ................................................................................................ 2-3 
5 TY91 VHF COM INTERFACE...........................................................................................................2-4 
5.1 TY91 CONNECTOR (TRIG TY91(L) ONLY)....................................................................... 2-4 
5.2 INTERFACING THE TY91(L) AS SINGLE,COM 1OR COM 2............................................2-4 
5.3 ANTENNA CABLE.............................................................................................................. 2-4 
5.4 TY91 TNC ANTENNA CONNECTION.................................................................................2-5 
5.5 VHF COMMUNICATIONS ANTENNA INSTALLATION.........................................................2-5 
6 TELEPHONE (DUPLEX)FUNCTION FOR BLUETOOTH ®CAPABLE CELL PHONES ......................2-6 
6.1 PAIRING SEPARATE MUSIC AND TELEPHONE DEVICES......................................................2-6 
6.2 TELEPHONE SIDETONE......................................................................................................2-7 
6.3 "SWAP"MODE ..................................................................................................................2-7 
6.4 BACKLIGHTING.................................................................................................................2-7 
6.5 UNSWITCHED INPUTS........................................................................................................2-7 
7 INTERCOM WIRING............................................................................................................................2-8 
7.1 MUSIC INPUTS...................................................................................................................2-8 
7.2 MUSIC MUTING................................................................................................................. 2-8 
8 ADJUSTMENTS ...................................................................................................................................2-8 
9 MICROPHONE GAIN REDUCTION....................................................................................................... 2-9 
10 USER SETUP ADJUSTMENTS.......................................................................................................... 2-10 
11 COMMUNICATIONS ANTENNA INSTALLATION NOTES .................................................................2-11 
11.1 ANTENNA LOCATION....................................................................................................2-11 
12 TY91(L) ADJUSTMENTS................................................................................................................2-12 
12.1 RADIO SIDETONE &RADIO SQUELCH ADJUSTMENT ...................................................2-12 
12.2 RADIO FREQUENCY SPACING,25 KHZ OR 8.33 KHZ.....................................................2-12 
13 PAR200B PIN ASSIGNMENTS........................................................................................................2-13 
14 POST INSTALLATION CHECKOUT .................................................................................................2-14 
15 UNIT INSTALLATION......................................................................................................................2-14 

PS Engineering Inc. ® 
PAR200B Audio Selector Panel, COM radio Controller and Intercom System 
Installation and Operator’s Manual 
200-228-0300 Page ii October 2019 
16 OPERATIONAL CHECKOUT ...........................................................................................................2-14 
16.1 TY91 CHECKOUT..........................................................................................................2-14 
16.2 TELEPHONE CHECKOUT............................................................................................2-15 
17 FINAL INSPECTION ........................................................................................................................2-15 
 Section III OPERATION .............................................3-1 
1 SCOPE ..............................................................................................................................................3-1 
1.1 ICONS AND SECOND FUNCTIONS ....................................................................................... 3-2 
2 POWER AND FAIL SAFE (1)................................................................................................................3-2 
2.1 TY91(L) RADIO POWER (AS SINGLE RADIO OR COM 1ONLY).........................................3-2 
2.2 ICS AND RADIO VOLUME CONTROLS (1)......................................................................... 3-2 
3 COMMUNICATIONS TRANSMIT (XMT) SELECTION (2)....................................................................3-3 
4 COM RECEIVE AUDIO SELECTOR (3)..............................................................................................3-3 
4.1 INTELLIAUDIO®DIMENSIONAL AUDIO ...........................................................................3-3 
5 NAVAID AUDIO SELECTION (4)..........................................................................................................3-4 
6 COCKPIT SPEAKER (10) ....................................................................................................................3-4 
7 VHF TRANSCEIVER CONTROL (6) ....................................................................................................3-4 
7.1 FREQUENCY SELECTION (6)..............................................................................................3-4 
7.1 RADIO SIDETONE &RADIO SQUELCH ADJUSTMENT .......................................................3-6 
7.2 MONITOR MODE (WHEN PAR200B IS COM 1OR STAND-ALONE ONLY).........................3-6 
7.3 TUNING 8.33 KHZ CHANNEL SPACING..............................................................................3-7 
8 INTERCOM OPERATION (8)...............................................................................................................3-8 
8.1 INTELLIVOX®VOX-SQUELCH..........................................................................................3-8 
8.2 MONO HEADSETS IN STEREO INSTALLATION ...................................................................3-9 
8.3 INTERCOM MODES (8) ......................................................................................................3-9 
9 BLUETOOTH OPERATION................................................................................................................. 3-10 
9.1 BLUETOOTH TELEPHONE CONNECTION .........................................................................3-10 
9.2 TELEPHONE (TEL) OPERATION......................................................................................3-10 
10 MUSIC MODE MENUS (9) ..............................................................................................................3-11 
11 MUSIC MUTING (9)........................................................................................................................3-12 
12 INPUTS............................................................................................................................................3-12 
13 USER SETUP FUNCTIONS............................................................................................................... 3-12 
13.1 DISPLAY........................................................................................................................3-13 
13.2 BLUETOOTH..................................................................................................................3-13 
13.3 OPTIONS........................................................................................................................3-14 
13.4 OPTIONS........................................................................................................................3-14 
 Section IV –Warranty and Service .....................................4-1 
1 WARRANTY........................................................................................................................................4-1 
2 FACTORY SERVICE............................................................................................................................4-1 
 Appendix A –External PTT Hook Up .................................................................... A 
 Appendix B –PAR200B Installation Drawings.............................................................B 
1 TY91 RADIO INSTALLATION DRAWINGS ............................................................................................B 
 Appendix C –J1 Connector Interconnect .....................................................................C 
 Appendix D –J2 Connector Interconnect .................................................................... D 
 Appendix E –Instructions for FAA Form 337 and continuing airworthiness................E 
1 INSTRUCTIONS FOR FAA FORM 337,AUDIO PANELS.........................................................................E 
2 INSTRUCTIONS FOR CONTINUING AIRWORTHINESS,AUDIO SYSTEM................................................E 
3 ICA FOR TRIG TY91 RADIO:...............................................................................................................E 
 Appendix F –RTCA DO160G Environmental Qualification Form...............................F 
 
Rev 
Date 
Change 

October 2019 
Release of PAR200B 
 

PS Engineering Inc. ®

PAR200B Audio Selector Panel, COM radio Controller and Intercom System

Installation and Operator’s Manual

200-228-0300 Page 1-1 October 2019

Section I – GENERAL INFORMATION

1.1 INTRODUCTION

The PAR200B represents another advancement in cockpit audio control and intercommunications utility.

IntelliAudio®, using the USAF patented (#7,391,877) technology, provides True Dimensional Sound, which

helps pilots to easily discern simultaneous radio receptions.

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 annunciation and

selection.

The PAR200B is interchangeable with the PAR200A Audio Panels

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 PAR200B.

1.2 SCOPE

This manual provides detailed installation and operation instructions for the PS Engineering PAR200B-series

of Audio Selector Panel/Intercom Systems. This includes the following units:

Model

Description

PS Engineering

Part Number

PAR200B

Stereo Audio Selector Panel with control for VHF Commu-

nications radio. Includes stereo intercom, with IntelliAu-

dio®, and Bluetooth® Interface

050-228-0300

TY91(L)

VHF Communications Transceiver (6 Watt)

050-228-8744

1.3 EQUIPMENT DESCRIPTION

The PAR200B is a state-of-the-art audio isolation amplifier and audio selector that contains an automatic

voice activated (VOX) intercom system and serial data control/indication for a Trig VHF communications

receiver. It can switch two transceivers (Com 1, Com 2) and two receivers (Nav 1, Nav 2).

A Bluetooth ® TELEPHONE feature allows the PAR200B to interface the aircraft headset(s) and Bluetooth

enabled cellular devices.

Warning: Useofnon-aviationapprovedcellulartelephoneequipmentmaybeprohibitedby regulation.

PS Engineering is not responsible for unauthorized airborne use of cellular telephones.

For airborne use, the PAR200B 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 positions, and

allow radio communications. In "Split Mode”, the PAR200B 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 micro-

phone 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. Failsafe will only be heard

in one ear when wired as stereo.

A four-station activated (VOX) intercom is included in the PAR200B. This system has PS Engineering’s

patented IntelliVox® circuitry that eliminates manual adjustments. The intercom system incorporates pilot

isolate, all and crew modes, two independent stereo music inputs with "SoftMute™".

The dual concentric knob on the left side controls intercom volume (small knob) radio volume (large knob,

and radio frequency input. This selection is made with the top line-select button.

PS Engineering Inc. ®

PAR200B Audio Selector Panel, COM radio Controller and Intercom System

Installation and Operator’s Manual

200-228-0300 Page 1-2 October 2019

1.4 APPROVAL BASIS —FAA TSO, EASA ETSO

1.1.1 PAR200B

The PAR200B-series Audio Selector Panels have FAA authorization under TSO C139 (Aircraft Audio Sys-

tems and Equipment). The VHF Communication Transceiver portion of the PAR200B holds TSO authori-

zations under TSO C169a.

The PAR200B-series Audio Selector Panels hold EASA authorization under ETSO C139 (Aircraft Audio

Systems and Equipment). The VHF Communication Transceiver portion of the PAR200B is EASA author-

ized under ETSO-2C169a. EASA.IM.210.10053809.

The partial TSO applies to C169a because the PAR200B unit provides control and display only for the TY91-

series of VHF communications equipment.

The audio system complies with relevant portions of ED-14C/DO-160G (Environmental Conditions and Test

Procedures for Airborne Equipment), DO-254, (Design Assurance Guidance for Airborne Electronic Hard-

ware) and ED-18/DO-214 (Audio Systems Characteristics and Minimum Operational Performance Stand-

ards for Aircraft Audio Systems). NOTE:

The conditions and tests for TSO approval of this article are minimum performance standards.

Those installing this article, on or in a specific type or class of aircraft, must determine that the

aircraft installation conditions are within the TSO standards. The article may be installed only

following 14 CFR Part 43 or the applicable airworthiness requirements.

1.1.2 Trig TY91-Series:

The VHF Communication Radio (Trig Avionics TY91L/) is EASA and FAA-approved under ETSO

210.10042695, Rev, B or Subsequent Revision, under 2C169a Class C, E, H1, H2, 4, 6, ETSO 2C128, TSO

C169a Class C, E, 4, 6, TSO C128a TSO-C169a, ETSO 2C169a Class C, E, H1, H2, 4, 6, ETSO 2C128,

TSO C169a Class C, E, 4, 6, TSO C128a EUROCAE ED-23C, EUROCAE ED-67, EUROCAE ED-14F

(RTCA DO-160F), RTCA DO-186B, RTCA DO-207 ED-12B (RTCA DO-178B) Level B DO-254 Level

FCC Identification TY91 VZI00882

Applicable documents EUROCAE ED-23C, EUROCAE ED-67, EUROCAE ED-14F (RTCA DO-160F),

RTCA DO-186B, RTCA Software ED-12B (RTCA DO-178B) Level B Hardware DO-254 Level C

Operation is subject to the following conditions:

This device may not cause harmful interference. This device must accept any interference received, including

interference that may cause undesired operation.

1.5 SPECIFICATIONS

Audio Selector/Intercom

FAA TSO C139 EASA ETSO C139

Communications Transceiver

FAA TSO-C169a (PARTIAL) EASA ETSO 2C169A

Environmental Qualification DO-160G

A1C1BAESRXXXXXXZ B(XX)ABATTBXXA2E2 XXX

Operating Temperature Range:

-20º C to 55ºC, short term -40°C to +70°C

Altitude:

Up to 35,000 feet in a non-pressurized area

WEIGHT

PAR200B Unit

Rack with connectors

1.0 lb. (0.45 kg)

0.51 lb. (0.24 kg)

Dimensions

Height: 1.3 in. (3.3 cm) Width: 6.25 in. (16.9 cm)

Depth behind panel 7.15 in. (18.16 cm)

PS Engineering Inc. ®

PAR200B Audio Selector Panel, COM radio Controller and Intercom System

Installation and Operator’s Manual

200-228-0300 Page 1-3 October 2019

AUDIO PANEL POWER REQUIREMENTS (Including Internal Lighting):

Voltage:

11-33 VDC

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, Nav 1, Nav 2)

Unswitched Inputs:

Transmitter Selections:

3 (Com 1, Com 2,

Com1/2)

Headphone Impedance:

150 –1000 

Headphone Output:

38 mW each headset, no clipping <1% THD typical

into 150

Speaker Output (into 4 ) with no clipping

14 VDC:

28 VDC:

3 Watts (min.)

10 Watts (min.)

Microphone Impedance:

150 - 600 

Intercom Specifications

Intercom Positions:

4 places (with individual IntelliVox® circuits) (8 with

expansion, -0202 ONLY)

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 –16 kHz

Bluetooth FCC ID

Class 3, FCC ID QOQWT32I

TY91L VHF Transceiver Specifications

Radio Type

Amplitude Modulation (AM) Aircraft Transceiver

Channels (Transmit & receive)

760 channels, 25KHz spacing

2280 channels, 8.33 kHz spacing

118.000 –136.992MHz

Frequency Selection

On PAR200B Audio Panel

Frequency Display

Alpha/numeric OLED display on PAR200B

Frequency control

PLL frequency synthesis, which is microprocessor

controlled in TY91.

Power consumption Receive (no signal)

Transmit

2.8W @ 14VDC

3.2A

Input Voltage

11-33 VDC 5A Circuit Breaker.

Power output

5 watts (nominal) VSWR Tolerance < 2:1 for best op-

eration (5:1 without damage)

Receiver sensitivity

-6dB SINAD @ 5µV (1KHz audio with 70% modula-

tion)

Data Interface

RS232

Headset volume output

Nominal 100 milliwatts output to 600 Ω

Temperature range

-20 to +70 degrees Celsius

Stability

< +/- 4.00 ppm

Dimensions

W-2.5” x H-1.9” x D6.3” (plus 1.5” for harness) W-

66 mm xH-48mm D-160 (plus 35mm for harness)

Weight

0.77 lbs.

0.350 kg

FCC ID:

VZI00882

PS Engineering Inc. ®

PAR200B Audio Selector Panel, COM radio Controller and Intercom System

Installation and Operator’s Manual

200-228-0300 Page 1-4 October 2019

1.6 EQUIPMENT SUPPLIED

One ea. of the following items:

Model

Description

PS Part Num-

ber

Trig P/N

PAR200B

PAR200B Audio Panel with intercom and radio function control

050-228-0300

And ONE of the TY91(L) below

TY91(L)

VHF Communications Transceiver (6 watts)

050-228-8744

00882-00-05

Installation Kit: 250-890-0000, contains:

Description

Quantity

Part Number

PAR200B installation rack assembly

430-890-0040

PAR200B Rack back plate

430-890-0050

44-pin connector kit

120-891-2045-

Backshell, connector

625-025-2465

Backshell Retainer

431-891-0100

4 40 X 7/16 screw w/nylon patch

475-440-0007

4 40 X 3/8 screw w/lock washer

475-440-1038

4 40 X 1/8 screw w/lock washer

475-440-0001

Solder Lug

475-009-0001

Cable Clamp

625-001-0002

#6-32 x ½” Flat head Philips screw

475-632-0012

#6-32 Clip Nut

475-630-0002

TY91 Installation Kit 250-228-0200, Containing:

Description

Quantity

Part Number

DB 25 Connector, Crimp type

425-025-0010

DB 25 Connector hood

625-025-0001

DB 25 Thumb Screws 4-40 x 1.94

475-002-0002

Crimp female sockets

425-020-5090

TNC Crimp Connector

425-400-1223

1.7 EQUIPMENT REQUIRED BUT NOT SUPPLIED

a. Circuit Breaker: 1 ea; 3 amp PULL TYPE REQUIRED for PAR200B

b. Circuit Breaker: 1 ea; 5 amp PULL TYPE REQUIRED for transceiver power (to TY91)

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. Mounting hardware for TY91, as appropriate

i. Interconnect Wiring, coaxial cable (RG400 or RG142B or equivalent)

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 domesti-

cally. 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, British Virgin

Islands) a license is required. Visit http://wireless.fcc.gov for more information.

PS Engineering Inc. ®

PAR200B Audio Selector Panel, COM radio Controller and Intercom System

Installation and Operator’s Manual

200-228-0300 Page 2-1 October 2019

Section II - INSTALLATION

2.1 GENERAL INFORMATION

2.1.1 SCOPE

This section provides detailed installation and interconnection instructions for the PS Engineering PAR200B

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.

The PAR200B is interchangeable with the PAR200A Audio Panels, and can replace the PAR200A without

modification to the installation. A logbook maintenance entry is all that is required.

2.1.2 Certification Requirements

NOTE

The PAR200B Intercom is FAA approved under TSO C139/ETSO C139 (Aircraft Audio Systems and Equip-

ment) and contains partial elements of TSO C169a/ETSO 2C169A (VHF Radio Communications Transceiver

Equipment Operating Within Radio Frequency Range 117.975 To 137.000 Megahertz).

The partial TSO applies to C169a, because the PAR200B unit provides control and display only for the

TY91-series of VHF communications equipment.

The conditions and tests for TSO approval of this article are minimum performance standards. Those

installing this article, on or in a specific type or class of aircraft, must determine that the aircraft instal-

lation conditions are within the TSO standards.

The article may be installed only following 14 CFR Part 43 or the applicable airworthiness require-

ments.

See FAA AC 20-41A for information regarding substitute TSO Aircraft Equipment.

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 com-

ponents supplied with the list in Section 1.6. If any claim is to be made, save the shipping material 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 PAR200B is not required. However, the units should be kept away from heat pro-

ducing sources (i.e. defrost or heater ducts, dropping resistors, heat producing avionics) without adequate

cooling air provided.

2.3.2 Mounting Requirements

The PAR200B 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.

PS Engineering Inc. ®

PAR200B Audio Selector Panel, COM radio Controller and Intercom System

Installation and Operator’s Manual

200-228-0300 Page 2-2 October 2019

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 Trig TY91 mounting requirements

The TY91 remote VHF Communications radio is mounted to the aircraft structure with 4 ea #6-32 (not sup-

plied) screws through the mounting flange. Guidance can be found in AC 43.13-2B, Chapter 2.

Figure 2-1 TY91 VHF Transceiver (Remote Mount)

2.3.4 Audio Panel Mounting Rack Installation

Remove the audio panel 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 mount-

ing 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, shielding and sol-

dering 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 PAR200B 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. Shielding can reduce or prevent radiated noise (i.e., beacon,

electric gyros, switching power supplies, etc.) However, installation combinations can occur where interfer-

ence is possible. The PAR200B was designed in an RFI hardened chassis and has internal Electromagnetic

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 air-

frame that are detected by the audio system. Follow the wiring diagram very carefully to help ensure a min-

imum of ground loop potential. Use only Mil Spec shielded wires (MIL-C-275000, or better). Under no

PS Engineering Inc. ®

PAR200B Audio Selector Panel, COM radio Controller and Intercom System

Installation and Operator’s Manual

200-228-0300 Page 2-3 October 2019

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

PAR200B 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 signal and

ground connections are made directly to the dedicated music signal and ground inputs on the PAR200B. The

power for In Flight Entertainment 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 active

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 installation

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 PAR200B. 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 installa-

tion, 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 PAR200B Connector Pin crimping tools

Manufacturer

Crimping Tool

Positioner

Extraction tool

Mil-Spec

M22520/2-01

M22520/2-08

Daniels

AFM8

K13-2

M24308-1

Table 2-2 TY91 Connector Crimping tools

2.4.3 Audio Panel interface

The PAR200B is designed to interface with standard aircraft avionics, and presents a 500 receiver imped-

ance. 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 N1 and N2 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 conductor

of the twisted-shielded cable.

Otros manuales para PAR200B

Tabla de contenidos

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