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PMA8000D
Installation Manual
43 pgs774.64 Kb0
Pilot’s Guide
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PS Engineering PMA8000D Installation Manual

9800 Martel Road
Lenoir City, TN 37772
www.ps-engineering.com
Rev. 6, Oct. 2014
For units with serial number BD1023 and above.
Audio Selector Panel with Marker Beacon Receiver
High-fidelity Stereo Intercom
Designed specifically for Dual Audio Panel Configurations
System Installation and Operation Manual
FAA- TSO C50c, C35d
EASA ETSO C50c, 2C35d
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. 2014 ©
Copyright Notice
Any reproduction or retransmittal of this publication, or any portion thereof, without the expressed written permission of PS Engineering, 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.
In certified aircraft, warranty is not valid unless this product is installed by an
Authorized PS Engineering dealer.
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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.......................................................................................................................................... 1-2
1.5 SPECIFICATIONS...........................................................................................................................................1-3
1.6 EQUIPMENT SUPPLIED ...............................................................................................................................1-4
1.7 EQUIPMENT REQUIRED BUTNOT SUPPLIED ....................................................................................... 1-4
1.8 OPTIONAL ITEMS..........................................................................................................................................1-4
1.9 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 AUDIO PANEL MOUNTING RACK INSTALLATION ............................................................. 2-1
2.3.4 AUDIO PANEL TRAY AND CONNECTOR ASSEMBLY ......................................................... 2-2
2.4 CABLE HARNESS WIRING ...................................................................................................................................2-2
2.4.1 ELECTRICAL NOISE........................................................................................................... 2-2
2.4.2 POWER.............................................................................................................................. 2-3
2.4.3 AUDIO PANEL INTERFACE ................................................................................................ 2-3
2.4.4 COCKPIT SPEAKER............................................................................................................ 2-3
2.4.5 BACKLIGHTING................................................................................................................. 2-3
2.4.6 UNSWITCHED INPUTS........................................................................................................ 2-4
2.4.7 "SWAP" MODE.................................................................................................................. 2-4
2.4.8 BLUETOOTH TELEPHONE FUNCTION ................................................................................ 2-4
2.4.9 PUBLIC ADDRESS MODE...................................................................................................2-5
2.4.10 PA MUTE (J2, PIN 12)..................................................................................................... 2-6
2.4.11 MISCELLANEOUS LOGIC OUTPUT (J2, PIN 18) ............................................................... 2-7
2.4.12 MARKER HIGH SENSITIVITY (J2 PIN 13) ........................................................................ 2-7
2.4.13 DUAL AUDIO PANEL CONNECTIONS............................................................................... 2-7
2.4.14 CVR OUTPUT (J2, PIN 4) PART NUMBERS –0314, -0315, -0316, -0317, -0334, -0335, -
0336 AND -337 ONLY)................................................................................................................. 2-7
2.5 INTERCOM WIRING..............................................................................................................................................2-7
2.5.1 ENTERTAINMENT INPUTS.................................................................................................. 2-7
2.5.2 ENTERTAINMENT MUTING ................................................................................................ 2-8
2.5.3 CONFIGURING MUSIC INPUT WITH FUNCTION KEYS........................................................ 2-9
2.5.4 PLAYBACK BUTTON INSTALLATION................................................................................. 2-9
2.5.5 PASSENGER INTERCOM EXPANSION (INTELLIPAX)......................................................... 2-9
2.6 MARKER BEACON INSTALLATION ....................................................................................................................2-10
2.6.1 MARKER ANTENNA INSTALLATION................................................................................ 2-10
2.6.2 EXTERNAL MARKER LIGHTS.......................................................................................... 2-10
2.6.3 MIDDLE MARKER SENSE................................................................................................ 2-10
2.6.4 MARKER SENSITIVITY SWITCH (J2 PIN 13) ....................................................................2-10
2.7 ADJUSTMENTS...................................................................................................................................................2-10
2.8 COMMUNICATIONS ANTENNA INSTALLATION NOTES.......................................................................................2-12
2.9 PMA8000D PIN ASSIGNMENTS.........................................................................................................................2-13
2.10 WIRING CHECKOUT..........................................................................................................................................2-14
2.11 UNIT INSTALLATION .........................................................................................................................................2-14
PS Engineering
PMA8000D Audio Selector Panel and Intercom System
Installation and Operator’s Manual
200-890-0304 Page ii Rev. 6, Oct. 2014
2.12 OPERATIONAL CHECKOUT ...............................................................................................................................2-14
2.12.1 REQUIRED TEST EQUIPMENT........................................................................................ 2-14
2.12.2 AUDIO PANEL TEST...................................................................................................... 2-14
2.12.3 MARKER CHECKOUT .................................................................................................... 2-15
2.12.4 BLUETOOTH TELEPHONE CHECKOUT........................................................................... 2-15
2.12.5 INTERNAL RECORDER CHECKOUT................................................................................ 2-15
2.12.6 FUNCTION BUTTON CHECKOUT.................................................................................... 2-15
2.12.7 REPEAT FOR OTHER AUDIO PANEL................................................................................ 2-16
2.13 FINAL INSPECTION............................................................................................................................................2-16
Section III OPERATION..........................................................3-1
3.1 SCOPE...............................................................................................................................................................3-1
3.2 COMMUNICATIONS TRANSMIT (XMT) SELECTION (2) ......................................................................................3-1
3.3 AUDIO SELECTOR (4)..........................................................................................................................................3-2
3.4 BLUETOOTH TELEPHONE....................................................................................................................................3-2
3.4.1 CELL PHONE SIDETONE .................................................................................................... 3-3
3.5 SPEAKER AMPLIFIER (5).....................................................................................................................................3-3
3.6 MARKER BEACON OPERATION (9) .....................................................................................................................3-4
3.7 INTERCOM OPERATION.......................................................................................................................................3-4
3.7.1 INTELLIVOX® VOX-SQUELCH.......................................................................................... 3-4
3.7.2 INTERCOM VOLUME CONTROL (7)................................................................................... 3-5
3.7.3 INTERCOM MODES (8) ...................................................................................................... 3-5
3.8 MUSIC AND MUSIC MUTING (6)..........................................................................................................................3-6
3.8.1 MUSIC IN PILOT ISO MODE............................................................................................... 3-7
3.9 UTILITY JACK.....................................................................................................................................................3-7
3.9.1 AUDIO ADVISORY INPUT.................................................................................................. 3-7
3.9.2 MUSIC INPUT .................................................................................................................... 3-8
3.10 MUSIC DISTRIBUTION .........................................................................................................................................3-8
3.10.1 MUSIC FUNCTION (C) (MUSIC DISTRIBUTION CONTROL)(COPILOT’S AUDIO PANEL
ONLY) 3-8
3.10.2 MUSIC 1 VOLUME........................................................................................................... 3-9
3.11 SMART FUNCTION KEYS (SFK)........................................................................................................................ 3-10
3.11.1 INTERCOM FUNCTION (A) (ALTERNATE INTERCOM FUNCTION).................................. 3-11
3.11.2 MONITOR FUNCTION (B) (MONITOR MODE)................................................................ 3-11
3.12 BLUETOOTH® INTERFACE ................................................................................................................................ 3-11
3.12.1 PAIRING AND UNPAIRING BLUETOOTH DEVICES .......................................................... 3-11
3.12.2 POWER ON ANNOUNCEMENT ........................................................................................ 3-12
3.13 INTERNAL RECORDER AND PLAYBACK.............................................................................................................3-12
Section IV – Warranty and Service 4-1
4.1 WARRANTY......................................................................................................................................................... 4-1
4.2 FACTORY SERVICE..............................................................................................................................................4-1
Appendix A – PMA8000D Installation Drawings .................................................................................A
Appendix B –PMA8000D Radio Interconnect ..................................................................................B
Appendix C – PMA8000D Audio Interconnect ..................................................................................C
Appendix D – Instructions for FAA Form 337 and continuing airworthiness ...................................D
8.1 INSTRUCTIONS FOR FAA FORM 337, AUDIO PANELS........................................................................................... D
8.2 INSTRUCTIONS FOR CONTINUING AIRWORTHINESS, AUDIO SYSTEM ................................................................... D
Appendix E – RTCA DO160D Environmental Qualification Form.........................................................E
Rev
Date
Change
0
January 2012
New Release of manual p/n -0304, for PMA8000D
1
March 2012
Add stuck microphone protection
2
April 2012
Add 5V lighting version -0305
3
June 2013
Add Grey bezel versions
4
December 2013
Add CVR Versions
5
May 2014
Add vertical versions
6
October 2014
Updated Unswitched 1 configuration
PS Engineering
PMA8000D Audio Selector Panel and Intercom System
Installation and Operator’s Manual
200-890-0304 Page 1-1 Rev. 6, Oct. 2014

Section I – GENERAL INFORMATION

1.1 INTRODUCTION

The PMA8000D represents another evolutionary step in cockpit audio control and intercommunications utility. Using our patented IntelliVox® design, front panel utility jack, 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 PMA8000D is specifically designed to be used in a dual audio panel environment; where the pilot and copilot positions have independent control over the radio au­dio control. The PMA8000D units communicate information between the units to make the operation logi­cal and utilitarian, and avoid operations that are inconsistent with radio and cockpit communication practic­es.
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 PMA8000D.

1.2 SCOPE

This manual provides detailed installation and operation instructions for the PS Engineering PMA8000D­series of Audio Selector Panel/Intercom Systems. This includes the following units:
Unit Part Number
Backlighting
Bezel
CVR Output
Vertical
050-890-0304
14/28 VDC
Black
No
No
050-890-0305
5 VDC
Black
No
No
050-890-0306
14/28 VDC
GreyNoNo
050-890-0307
5 VDC
GreyNoNo
050-890-0314
14/28 VDC
Black
Yes
No
050-890-0315
5 VDC
Black
Yes
No
050-890-0316
14/28 VDC
Grey
Yes
No
050-890-0317
5 VDC
Grey
Yes
No
050-890-0324
14/28 VDC
Black
No
Yes
050-890-0325
5 VDC
Black
No
Yes
050-890-0326
14/28 VDC
GreyNoYes
050-890-0327
5 VDC
GreyNoYes
050-890-0334
14/28 VDC
Black
Yes
Yes
050-890-0335
5 VDC
Black
Yes
Yes
050-890-0336
14/28 VDC
Grey
Yes
Yes
050-890-0337
5 VDC
Grey
Yes
Yes
Each ship set contains two units and installation kits.

1.3 EQUIPMENT DESCRIPTION

The PMA8000D is a state-of-the-art audio isolation amplifier and audio selector that contains an automatic voice activated (VOX) intercom system and integral marker beacon receiver. It can switch three transceiv­ers (COM 1, COM 2, COM 3) and six receivers (NAV 1, NAV 2, ADF, AUX (DME), and MKR.
The PMA8000D was designed specifically for installations requiring Dual Audio Panels, because the pri­mary audio panel sends status information to the secondary audio panel to prevent undesirable operation modes such as simultaneous transmission on the same radio by both crew members, and primary control over the intercom modes.
A full duplex cellular telephone interface allows the PMA8000D to act as an audio connection between aircraft headphone and microphones and specific aircraft approved (FAA/FCC) cellular telephone equip­ment, through the front mounted jack, or with the Bluetooth® interface.
PS Engineering
PMA8000D Audio Selector Panel and Intercom System
Installation and Operator’s Manual
200-890-0304 Page 1-2 Rev. 6, Oct. 2014
Warning: Use of non-aviation approved cellular telephone equipment may be prohibited byFCCregulation.
PS Engineering is not responsible for unauthorized airborne use of cellular telephones.
For airborne use, the PMA8000D must be interfaced with an approved system.
There are five unswitched inputs, available for traffic or EGPWS, autopilot disconnect, and/or radar altime­ter warning, with the fifth unswitched input through a front-mounted utility jack, when it is configured to act as a fifth unswitched input. Unswitched input 3 is adjustable, see page § 2.4.8
Pushbuttons select the receiver audio source provided to the headphones. A SPR button allows the user to listen to the receiver(s) selected on the cabin speaker. Except for the unswitched inputs, all speaker audio is muted during transmit. Unswitched inputs 1, 3, and 4 are always presented to the aircraft speaker. Unswitched input 2 will be presented to the speaker when the front panel SPR push button has been select­ed. Pushbutton switches select one of the communication transceivers.
A fail-safe mode connects the crewmembers’ headphone and microphone to COM 1 if power is removed for any reason, or if the power switch is placed in the Off (Fail-safe) position.
NOTE: Both crew members are connected to COM 1 in fail-safe. There is no priority, and in some cases microphone loading may make it necessary to unplug one crew member’s microphone for optimum trans­mission quality.
A voice activated (VOX) intercom is included in the PMA8000D. 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™". Intercom 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 on the copilot audio panel controls the passenger intercom volume. Intercom squelch is automatic.
A 3-light, 75 MHz Marker Beacon receiver is integrated in each PMA8000D. This provides the necessary Marker Beacon lights and audio indications necessary for that portion of an Instrument Landing System (ILS) approach. A pushbutton labeled MKR allows the pilot select high or low sensitivity as well as test and mute modes.
In the PMA8000D, a Bluetooth® wireless interface is available for wireless telephone and music connec­tion.

1.4 APPROVAL BASIS

FAA TSO Approval. The PMA8000D-series Audio Selector Panels are FAA approved under TSO C50c (Audio Amplifiers) and
TSO C35d (Marker Beacon Receivers), ETSO C50C/ and 2C53d. All systems comply with relevant portions of EUROCAE RTCA MPS WG No. 7/70, DO-143 and (Marker
Beacon Receivers), ED-14C/DO-160C (Environmental Conditions and Test Procedures for Airborne Equipment), ED12B/DO-178B, Level D (Software Considerations for Airborne Equipment) and ED- 18/DO-214 (Audio Systems Characteristics and Minimum Operational Performance Standards for Aircraft Audio Systems).
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.
PS Engineering
PMA8000D Audio Selector Panel and Intercom System
Installation and Operator’s Manual
200-890-0304 Page 1-3 Rev. 6, Oct. 2014

1.5 SPECIFICATIONS

TSO COMPLIANCE
Marker Beacon:
FAA TSO C35d, Class A ETSO 2C35d
Audio Selector/Intercom:
FAA TSO C50c, Class 1a ETSO C50c
APPLICABLE DOCUMENTS:
RTCA/DO-214 RTCA/DO-143 RTCA/DO-160D RTCA/DO-178B DO-254
ENVIRONMENTAL Qualifications:
A1D1CABSMXXXXXXZBABATBXXE2XXX
Operating Temperature Range:
-15º C to 55ºC
Altitude:
Up to 50,000 feet in an non-pressurized area
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
PMA8000D Unit Rack with connectors
1.34 lb. (0.61 kg)
0.51 lb. (0.24 kg)
POWER REQUIREMENTS (Including Internal Lighting):
Voltage:
11 to 33 VDC
Maximum Current:
2.5 Amp (Externally protected by a 5A pull-type break­er)
Audio Selector Specifications
Audio selector panel input impedance:
510
Input Isolation:
-60 dB (min.)
Speaker Muting:
-60 dB (min.)
Speaker Output (into 4 ) with no clipping
14 VDC: 28 VDC:
3 Watts (min.) 10 Watts (min.)
Receiver Inputs:
9 (COM 1, COM 2, COM 3, NAV 1, NAV 2, ADF, DME, MKR, AUX)
Unswitched Inputs:
5 (including front jack)
Transmitter Selections:
6 (COM 1, COM 2, COM 3 Com1/2 COM 1/3, COM 2/3)
Speaker Impedance:
4
Headphone Impedance:
150 – 1000
Headphone Output:
38 mW each headset, no clipping <1% THD typical
Microphone Impedance:
150 - 600
Bluetooth Radio (PMA8000D -0304 only)
Class 3, FCC ID QOQWT32AE
Intercom Specifications
Intercom Positions:
6 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
MARKER BEACON RECEIVER:
Frequency:
75 MHz Crystal Controlled
Sensitivity:
Low: High:
Capable of: (preset at factory for field application) 1000 Volts (Hard) (360 to 570 V soft) 200 Volts (Hard) (130 to 200 V soft)
Selectivity:
-6 dB at ±10 kHz
-40 dB at ±120 kHz
PS Engineering
PMA8000D Audio Selector Panel and Intercom System
Installation and Operator’s Manual
200-890-0304 Page 1-4 Rev. 6, Oct. 2014
External Lamp Output:
7.5 (±4 VDC unloaded, at maximum brightness) VDC positive when active, max. current 125 mA
MM Sense:
Active high (4.5 ± 1.0VDC)

1.6 EQUIPMENT SUPPLIED

One ship set includes 2 ea. of the following units:
Model
Description
Part Number
PMA8000D
Stereo Audio Selector Panel with Marker Beacon includes utility jack, Blue­tooth® interface and Internal Recorder System. This supports three com trans­ceivers. Designed specifically for Dual Audio Panel Installation.
2 ea. 050-890-0304
PMA8000D
Same as above, with 5VDC backlighting
2 ea 050-890-0305
PMA8000D
Same as -0304, with Gray Bezel option
2 ea. 050-890-0306
PMA8000D
Same as -0305, with Gray Bezel option
2 ea. 050-890-0307
PMA8000D
Same as -0304, with CVR output
2 ea 050-890-0314
PMA8000D
Same as -0305, with CVR output
2 ea 050-890-0315
PMA8000D
Same as -0306, with CVR output
2 ea. 050-890-0316
PMA8000D
Same as -0307, with CVR output
2 ea. 050-890-0317
PMA8000D
Same as -0304, with Vertical Orientation
2 ea 050-890-0324
PMA8000D
Same as -0305, with Vertical Orientation
2 ea. 050-890-0325
PMA8000D
Same as -0306, with Vertical Orientation
2 ea. 050-890-0326
PMA8000D
Same as -0307, with Vertical Orientation
2 ea 050-890-0327
PMA8000D
Same as -0304, with CVR and Vertical Orientation
2 ea 050-890-0334
PMA8000D
Same as -0305, with CVR output and Vertical Orientation
2 ea. 050-890-0335
PMA8000D
Same as -0306, with CVR output and Vertical Orientation
2 ea. 050-890-0336
PMA8000D
Same as -0307, with CVR output and Vertical Orientation
2 ea. 050-890-0337
PMA8000D Installation Kit: 250-890-0000 (2 kits required for dual installation)
Description
Quantity
Part Number
Installation rack assembly
1
430-890-0040
Rack back plate
1
430-890-0050
44-pin connector kit
2
120-891-2045
Backshell, connector
2
625-025-2465
Backshell Mounting Blocks
2
431-891-0100
4 40 X 7/16 screw w/nylon patch
4
475-440-0007
4 40 X 3/8 screw w/nylon patch
4
475-440-1038
4-40 x ¼” screw with lock washer
2
475-440-0001
Grounding 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

1.7 EQUIPMENT REQUIRED BUT NOT SUPPLIED

a. Circuit Breaker: 1 ea; 5 amp PULL TYPE REQUIRED for PMA8000D b. Speaker, 4 c. Headphone Jacks (Stereo, as Required) d. Microphone Jacks (as Required) e. Headphones, 150 (Stereo), up to 6 as required f. Microphones, up to 6 as required
g. Marker Antenna (75 MHz, VSWR <1:1.5, and appropriate for the airspeed) h. Interconnect Wiring

1.8 OPTIONAL ITEMS

a. Music Patch Cord, 3.5mm to 2.5mm, PS Part Number 425-006-2535 b. Passenger intercom unit, IntelliPAX, if desired 11636Remote

1.9 LICENSE REQUIREMENTS

None
PS Engineering
PMA8000D Audio Selector Panel and Intercom System
Installation and Operator’s Manual
200-890-0304 Page 1-5 Rev. 6, Oct. 2014
PMA8000D Bluetooth™ Radio approval:
FCC ID: QOQWT32AE Industry Canada ID: 5123A-BGTWT32AE CE EMC Directive 89/336/EEC as amended by Directives 92/31/EEC and 93/68/EEC
PS Engineering
PMA8000D Audio Selector Panel and Intercom System
Installation and Operator’s Manual
200-890-0304 Page 2-1 Rev. 6, Oct. 2014

Section II - INSTALLATION

2.1 GENERAL INFORMATION

2.1.1 SCOPE

This section provides detailed installation and interconnection instructions for the PS Engineering PMA8000D Audio Selector Panel/Intercom/ with internal Marker Beacon.
Please read this manual carefully before beginning any installation to prevent damage and post-installation problems. Installation of this equipment requires special tools, test equipment (refer to section 2.12.1)
and knowledge as required by 14 CFR 65.81 (b).

2.1.2 Certification Requirements

NOTE
The PMA8000D requires specialized knowledge and tools for an effective installation. An appropriately rated Certified Aircraft Repair Station must install this equipment in accordance with applicable regula­tions. PS Engineering, Incorporated warranty is not valid unless the equipment is installed by an authorized PS Engineering, Incorporated dealer. Failure to follow any of the installation instructions, or installation by a non-certified individual or agency will void the warranty, and may result in an unairworthy installation.

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. 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 PMA8000D 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 ade­quate cooling air provided.

2.3.2 Mounting Requirements

Each PMA8000D must be rigidly mounted to the instrument panel of the aircraft structure, within view and reach of the flight crew position. Installation must comply with FAA Advisory Circular AC 43.13-2B, or other FAA-approved aircraft technical data. 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 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 which is located directly above the hex-head screw. Carefully slide the unit free of the tray. Set the unit aside in a safe location until needed. Install the
PS Engineering
PMA8000D Audio Selector Panel and Intercom System
Installation and Operator’s Manual
200-890-0304 Page 2-2 Rev. 6, Oct. 2014
tray using six #6-32 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.

2.3.4 Audio Panel Tray and Connector Assembly

The rack back plate mates with two 44-pin connectors in each PMA8000D. The connectors are a sub­miniature crimp-type, and require the use a hand crimp tool, from table below (or equiv.). The 44 pin con­nectors are mounted to the tray back plate (430-890-0050) with quantity 4, #4-40 x 3/8” screws (475-440-
1038) and the quantity 2, back shell retainer mounting blocks (431-891-0100). Ensure that proper strain relief and chafing precautions are made during wiring and installation, using the cable clamp (625-001-
0002). Because the connector back shell (625-025-2465) is a single piece, the harness should be passed through the
shell before the pins are inserted into the connector. Two grounding solder lugs are provided (475-009-0001), which may be attached to the rear mounting plate
with 2 ea #4-40 x ¼” (475-440-0001) screws with captivated lock washers. These provide a convenient location to connect the shield ground terminations.
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 Connector Pin crimping tools

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 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 Electrical 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 PMA8000D 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 connector, J2 pins 8 & 9, of the PMA8000D 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 interference is possible. The PMA8000D was designed in a 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 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 no circumstances combine a microphone and headphone wiring into the same shielded bundle. Always use a 2­or 3-conductor, shield wire as shown on the installation-wiring diagram.
PS Engineering
PMA8000D Audio Selector Panel and Intercom System
Installation and Operator’s Manual
200-890-0304 Page 2-3 Rev. 6, Oct. 2014
The shields can be daisy-chained together, and then connected to the ground lugs mounted on the back plate shown in Appendix B.
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
PMA8000D units utilize a differential input 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 PMA8000D. The power for IFE and audio panel should be a common bus.
If a music jack instead of a music source is installed for Music 1 or 2, we recommend grounding the jack to airframe ground.
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 Power

The PMA8000D is compatible with both 14 and 28 Volt DC systems. A five (5) Amp circuit breaker is required for all installations. Power and ground wires should be #22 connected to J2 Pins 8 and 9 on each audio panel. Connect airframe ground to J2 Pin 10 and 11 only, in each audio panel. No dropping resistors are required.

2.4.3 Audio Panel interface

The PMA8000D is designed to interface with standard aircraft avionics, with a 510receiver 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.
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.

2.4.4 Cockpit Speaker

Each PMA8000D contains a cockpit speaker amplifier. Any radio audio source will be presented to the cockpit speaker when the SPR button is selected.
NOTE: Do NOT connect both audio panels directly to a single cockpit speaker. This could damage the audio panel. A dedicated cockpit speaker is recommended for each audio panel.
2.4.4.1 Speaker Load
The PMA8000D contains one speaker amplifier. Some units with internal speaker amplifiers, such as the King Radio KX170-series, require a resistive load to prevent damage if their speaker amplifier is not used. Connect the speaker output from the unit to the COM 2 Speaker load input on the PMA8000D (J1 27 WRT
28). The speaker load is 16, 3W. Only one speaker per load is available in the PMA8000D.

2.4.5 Backlighting

The PMA8000D has an automatic dimming of the pushbutton green annunciation LEDs and marker lamps controlled by a photocell. Control of the unit white backlighting is through the aircraft avionics dimmer. For 14 V (or 5 VDC p/n 050-890-0304, only) aircraft, connect J2 Pins 6 and 7 to the aircraft dimmer bus, and pin 5 to ground. For 28-volt systems, connect pin 7 to the aircraft dimmer, and pins 5 and 6 to ground.
PS Engineering
PMA8000D Audio Selector Panel and Intercom System
Installation and Operator’s Manual
200-890-0304 Page 2-4 Rev. 6, Oct. 2014
If an external dimmer control is not used, a constant back light illumination can be established for nighttime 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 annunciator LEDs.

2.4.6 Unswitched inputs

PMA8000D, J1, pins 31, 29 and J2 pin 15 are unswitched, unmuted (by transmitter keying), inputs # 1, 3 and 4, respectively. These inputs are presented to the pilot audio panel and copilot audio panel regardless of the audio configuration, and will always mute the entertainment inputs. These 510Ω inputs can be used for altimeter DH audio, GPS waypoint audio, and autopilot disconnect tones, or any other critical audio signal. Unswitched #1 is always present to the speaker and crew headphones Unswitched 3 and 4 inputs are always presented to the crew headphones and to the aircraft speaker.
Unswitched
Input
Hear in
Crew Headset
SPR button
Select
Gain
1
Yes
No
1:1(fixed)
2
Yes
Yes
1:1(fixed)
3
Yes
No
Adjustable
4
Yes
No
1:1(fixed)
5 (jack)
Yes
No
1:1(fixed)
Table 2-2 Unswitched input table Unswitched #2, J1 pin 44 is unswitched is always connected to the crew member’s headphone. However,
this unswitched audio is only presented to the aircraft speaker when the SPR push button has been selected. 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.
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 adjust the volume level of that unswitched input. Refer to Adjustments section.
The front panel jack can be configured to act as a fifth unswitched input. When configured through the front panel function switches (see operational section), the audio input to this jack will be presented to the pilot and copilot headsets, and not muted.
NOTE
The front-mounted utility jack is intended for portable equipment that is advisory in nature. It is NOT INTENDED for use as a primary warning channel. Audio of importance MUST ALWAYS be hard-wired into the unswitched inputs of the audio panel.

2.4.7 "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, COM 2 and COM 3 by pressing this switch with­out having to change the xmt selector on the audio panel. This yoke-mounted switch eliminates the need to remove your hands from the yoke to change transceivers. The transfer of TX indication from COM 1 to COM 2 and COM 3 shows that the swap has been initiated.
Swap selection of COM 3 (COM 1, COM 2, COM 3, or COM 1 and COM 2 only) is a user-selectable op-
tion. Holding the remote “swap” button, press and release the COM 3 RCV button to enable or disable the
COM 3 in the swap rotation.

2.4.8 Bluetooth Telephone Function

The PMA8000D is compatible with most Bluetooth® enabled devices for making and receiving telephone calls through the aircraft audio system.
PS Engineering
PMA8000D Audio Selector Panel and Intercom System
Installation and Operator’s Manual
200-890-0304 Page 2-5 Rev. 6, Oct. 2014
The pilot’s Bluetooth device is presented to the pilot’s audio panel (PMA8000D Pilot) only. M usic and telephone is not shared.
The copilot’s Bluetooth device is presented to the copilot’s audio panel (PMA8000D Copilot), and provid­ed music for the copilot and any passengers that may be connected to an intercom expansion unit. The copi­lots cellular telephone can also be shared with the pilot. See § 3.4.
2.4.8.1 Cell phone Sidetone
As shipped from PS Engineering, the PMA8000D provides cellular telephone sidetone (the user’s voice fed back to the headset). Some cell phones do provide sidetone. In PMA8000D audio panels, Telephone sidetone can be disabled by pressing the COM 3 and ADF buttons for more than one second. NOTE: This will not provide cellular telephone sidetone in ISOLATE intercom mode, because the intercom signal is not available to the pilot.
NOTE
Unauthorized use of unapproved cellular telephone devices in aircraft is subject to FCC enforcement action, which may include a $10,000 fine per incident. FCC Regulation 47 CFR § 22.925 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 airborne (not touching the ground). When any aircraft leaves the ground, all cellular telephones on board that aircraft must be turned off. 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 http://www.ps-engineering.com/support.

2.4.9 Public Address Mode

By pressing the Mute and SPR pushbuttons at the same time, the PMA8000D will be placed into public address (PA) mode. In this mode, the pilot will be talking over the cockpit speaker when he presses his PTT switch. Copilot will still continue on the selected COM radio.
When the discrete Output is enabled, J2 Pin 19 will go low when in PA mode, providing a logic level that can be used to incorporate a speaker-switching scheme. This 50 mA circuit (10Ω Z) can control a switching means such as a relay that would transfer the speaker output amplifier from the cockpit speaker to drive another cabin speaker. If the PA mode is used with a microphone in proximity to an active cockpit speaker, feedback might result.
To enable the PA discrete Output located at the rear connector, the internal configuration jumper, J4, MUST be placed across both pins in the header. This jumper is shipped as open from the factory.
NOTE: Do NOT connect both audio panels directly to a single PA speaker. This could damage the audio panel.
2.4.9.1 Public Address Output Jumper
1. Remove qty. 5 Phillip head screws from the PM8000B. NOTE: IF PRESENT, 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 #1.
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