Sirius Satellite Radio PMA8000-SR User Manual

9800 Martel Road

Lenoir City, TN 37772

www.ps-engineering.com

High-fidelity Stereo Intercom with integrated SIRIUS Satellite Radio

Audio Selector Panel with Marker Beacon Receiver

System Installation and Operation Manual

Patented under one or more of the following;

FAA-Approved TSO C50c, C35d

No. 5,903,227; 6,160,496 and 6,493,450

Document P/N 200-880-0000

Revision 13 July 2006

0--

Warranty is not valid unless this product is installed by an Authorized

PS Engineering dealer or PS Engineering harness is purchased.

PS Engineering, Inc. 2006 ©

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.

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........................................................................................................................1-2

1.6 EQUIPMENT SUPPLIED.............................................................................................................1-4

1.7 EQUIPMENT REQUIRED BUT NOT SUPPLIED....................................................................1-4

1.8 R

EQUIRED TEST EQUIPMENT TO CHECK INSTALLATION................................................................1-4

1.9 LICENSE REQUIREMENTS.......................................................................................................1-4

1.8 SIRIUS SUBSCRIPTION REQUIREMENTS............................................................................1-4

SECTION II - INSTALLATION.......................................................................................................2-1

2.1 GENERAL INFORMATION........................................................................................................2-1

2.1.1 SCOPE..........................................................................................................................................2-1

2.1.2 C

2.2 U

2.3 E

2.3.1 C

2.3.2 M

2.3.3 A

2.3.4 A

2.4 C

2.4.1 N

2.4.2 E

2.4.3 P

2.4.4 C

2.4.5 A

2.4.6 TEL (D

2.4.7 T

2.4.8 P

2.4.9 B

2.4.10 U

2.4.11 P

2.4.12 PA M

2.4.13 M

2.4.14 I

2.4.15 SIRIUS S

2.4.16 SIRIUS S

2.4.17 U

2.4.18 E

2.4.19 P

2.5 M

2.5.1 M

2.5.2 E

2.5.3 M

2.6 A

2.7 C

2.7.1 A

2.8 PMA8000-SR P

2.9 P

2.9.1 R

2.10 U

2.10.1 O

ERTIFICATION REQUIREMENTS ....................................................................................................2-1

NPACKING AND PRELIMINARY INSPECTION.................................................................................2-1

QUIPMENT INSTALLATION PROCEDURES .....................................................................................2-1

OOLING REQUIREMENTS..............................................................................................................2-1

OUNTING REQUIREMENTS...........................................................................................................2-1

UDIO PANEL MOUNTING RACK INSTALLATION ...........................................................................2-2

UDIO PANEL TRAY AND CONNECTOR ASSEMBLY .......................................................................2-2

ABLE HARNESS WIRING................................................................................................................2-2

OISE ............................................................................................................................................2-2

XISTING GMA340 INSTALLATION...............................................................................................2-3

OWER...........................................................................................................................................2-3

OMMUNICATIONS PUSH-TO-TALK ...............................................................................................2-3

UDIO PANEL INTERFACE..............................................................................................................2-3

UPLEX) FUNCTION FOR CELL PHONES ...............................................................................2-4

RANSMIT INTERLOCK...................................................................................................................2-4

ATENTED "SWAP" MODE .............................................................................................................2-4

ACKLIGHTING..............................................................................................................................2-4

NSWITCHED INPUTS...................................................................................................................2-5

UBLIC ADDRESS MODE..............................................................................................................2-5

UTE (J2, PIN 12).................................................................................................................2-5

ISCELLANEOUS LOGIC OUTPUT (J2, PIN 18).............................................................................2-5

NTERCOM WIRING.......................................................................................................................2-5

ATELLITE RADIO INSTALLATION..................................................................................2-6

ATELLITE RADIO FUNCTIONS .......................................................................................2-6

SE OF PXE7300 AND PAV 80 AUX INPUTS FOR SIRIUS SATELLITE RADIO DISTRIBUTION ....2-8

NTERTAINMENT MUTING ...........................................................................................................2-9

LAYBACK BUTTON INSTALLATION (J2, PIN 22- OPTION 1, ONLY) .........................................2-10

ARKER BEACON INSTALLATION.................................................................................................2-10

ARKER ANTENNA INSTALLATION .............................................................................................2-10

XTERNAL MARKER LIGHTS .......................................................................................................2-10

IDDLE MARKER SENSE (MARKER VERSION).............................................................................2-10

DJUSTMENTS................................................................................................................................2-10

OMMUNICATIONS ANTENNA INSTALLATION NOTES..................................................................2-11

UDIO ACTIVE OUTPUT...............................................................................................................2-11

IN ASSIGNMENTS..................................................................................................2-12

OST INSTALLATION CHECKOUT..................................................................................................2-13

EQUIRED TEST EQUIPMENT .......................................................................................................2-13

NIT INSTALLATION....................................................................................................................2-13

PERATIONAL CHECKOUT.........................................................................................................2-13

PMA8000-SR Series Audio Selector Panel and Intercom System

Installation and Operator’s Manual

PS Engineering

2.11 TEL CHECKOUT..........................................................................................................................2-14

2.12 SIRIUS S

2.12.1 S

2.12.2 SIRIUS S

2.13 I

2.14 F

NTERNAL RECORDER CHECKOUT (OPTIONAL).........................................................................2-15

INAL INSPECTION.......................................................................................................................2-15

SECTION III OPERATION ..............................................................................................................3-1

ATELLITE RADIO CHECKOUT......................................................................................2-14

IRIUS SIGNAL DROPOUT ..........................................................................................................2-14

ATELLITE RADIO ID NUMBER ....................................................................................2-15

3.1 SCOPE.............................................................................................................................................3-1

3.2 P

3.3 M

3.3.1 S

3.4 A

3.4.1 S

3.5 S

3.5.1 M

3.6 I

3.6.1 I

3.6.2 I

3.6.3 I

3.7 T

3.8 SIRIUS S

3.8.1 S

3.8.2 F

3.9 M

3.10 I

3.11 O

SECTION IV- WARRANTY AND SERVICE.................................................................................4-1

4.1 W

4.2 F

APPENDIX A EXTERNAL PTT HOOK UP.....................................................................................A

APPENDIX B – PMA 8000 INSTALLATION DRAWINGS............................................................B

APPENDIX C, J1 INTERCONNECT.................................................................................................C

APPENDIX D, J2 CONNECTOR INTERCONNECT......................................................................D

OWER SWITCH (1) (EMG-FAIL SAFE OPERATION) .....................................................................3-1

ICROPHONE (2) (XMT) SELECTION (ALL MODELS)...................................................................3-1

WAP MODE (SWITCH FROM COM 1 TO COM 2 REMOTELY) ..........................................................3-2

UDIO SELECTOR (4).......................................................................................................................3-2

PEAKER AMPLIFIER (5) ................................................................................................................3-2

PLIT MODE.....................................................................................................................................3-3

UTE BUTTON, SPLIT MODE ICS (6) ............................................................................................3-3

NTERCOM OPERATION ...................................................................................................................3-3

NTELLIVOX® VOX-SQUELCH.......................................................................................................3-3

NTERCOM VOLUME CONTROL (7).................................................................................................3-4

NTERCOM MODES (8) ...................................................................................................................3-4

ELEPHONE MODE (9).....................................................................................................................3-6

ATELLITE RADIO OPERATION (10) .................................................................................3-6

IRIUS SIGNAL DROPOUT...............................................................................................................3-7

RONT PANEL CONTROL OF SIRIUS RADIO...................................................................................3-7

ARKER BEACON OPERATION (10)................................................................................................3-8

NTERNAL RECORDER SYSTEM (OPTION 1)..................................................................................3-8

PERATION ....................................................................................................................................3-8

ARRANTY ......................................................................................................................................4-1

ACTORY SERVICE...........................................................................................................................4-1

APPENDIX E- INSTRUCTIONS FOR FAA FORM 337 AND CONTINUING

AIRWORTHINESS ...................................................................................................................................E

NSTRUCTIONS FOR FAA FORM 337, AUDIO PANELS ......................................................................E

9.1 I

NSTRUCTIONS FOR CONTINUING AIRWORTHINESS, AUDIO SYSTEM.............................................. E

9.2 I

APPENDIX F RTCA DO160D ENVIRONMENTAL QUALIFICATION FORM .............................F

Rev Date Change

3 3/9/05 RF connector detail added/TSO Approved 4 3/18/05 Added PA Mute Enable description and alt music, clarified SIRIUS Satellite Radio warranty 5 3/24/05 Combined installation parts kits and updated kit numbers 6 5/18/05 Corrected antenna connector reference 7 5/24/05 Corrected text for Unswitched Audio distribution 2.4.10 8 6/22/05 Added note for AUX and logic switching if DME installed 9 7/26/05 Added Ent. 1 low that could be needed if an external input is used. Corrected 3.7 10 8/1/05 Clarified Section 2.4.16.4 to REMOVE jumpers if necessary. 11 11/17/05 Added note for “TX Mute” J2 pin 30, Sect. 2.4.2.1, 2.4.16 & Appendix D 12 03/29/06 Added information on using PXE7300 and PAV80 AUX interface, Section 2.4.17 13 06/14/06 Added backshell retaining clamp to installation kit

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PMA8000-SR Series Audio Selector Panel and Intercom System

Installation and Operator’s Manual

PS Engineering

Section I GENERAL INFORMATION

1.1 INTRODUCTION

The PMA8000-SR represents another evolutionary step in cockpit audio control and intercommunications utility. Using our patented IntelliVox® design, this unit eliminates the requirements for intercom squelch adjustments. The unit is designed for outstanding ergonomics and visually defined mode annunciation 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 PMA8000-SR.

1.2 SCOPE

This manual provides detailed installation and operation instructions for the PS Engineering PMA8000SR-series of Audio Selector Panel/Intercom Systems. This includes the following units:

Description Part Number

Model PMA8000-SR Stereo Audio Selector Panel with Marker Beacon 050-880-0100 Option 1 Same as above with Digital Recorder added 050-880-0200

Where the functions are identical to all units, it will be referred to herein as a PMA8000-SR. Otherwise, the applicable units will be specified.

1.3 EQUIPMENT DESCRIPTION

The PMA8000-SR-series is a state of the art audio isolation amplifier and audio selector that contains an automatic voice activated (VOX) intercom system. It can switch two transceivers (Com 1, Com 2 ) and six receivers (Nav 1, Nav 2, ADF, DME, MKR and AUX).

A full duplex TEL mode allows the PMA8000-SR to act as an audio interface between aircraft headphone and microphones and specific aircraft approved

Warning

: Use of non-aviation approved cellular telephone equipment may be prohibited by regulation.

(FAA/FCC) cellular telephone equipment.

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

For airborne use, the PMA8000-SR must be interfaced with an approved system.

There are four unswitched inputs, available for traffic or EGPWS, autopilot disconnect, and/or radar altimeter warning.

Push buttons 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 are always presented to the aircraft speaker with the exception of #2 which is controlled by the speaker button.

Push button switches selects one of the communication transceivers for the pilot and copilot position, and allows radio transmission. In "Split Mode" the PMA8000-SR 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 microphone to COM 1 if power is removed for any reason, or if the power switch is placed in the Off (Failsafe) position.

A six-station voice activated (VOX) intercom is included in the PMA8000-SR. This system has PS Engineering’s patented IntelliVox® circuitry that eliminates manual adjustments. The system contains six separate VOX mic circuits, and only opens the microphone channel in use.

The intercom system incorporates pilot isolate, all and crew modes, two independent stereo music inputs with "Soft Mute," and flashing LED indications for transmit indications. Intercom control is through two concentric front panel volume controls and a pushbutton intercom mode switch. The small volume knob

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PMA8000-SR Series Audio Selector Panel and Intercom System

Installation and Operator’s Manual

PS Engineering

controls the intercom level for the pilot and copilot, while the large knob controls the passenger intercom volume. Intercom squelch is automatic.

The PMA8000-SR incorporates an integrated SIRIUS Satellite Radio receiver, which allows the aircraft occupants to enjoy their music

A 3-light Marker Beacon receiver is integrated in the PMA8000-SR. This provides the necessary Marker Beacon lights and audio indications necessary for 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.

1.4 APPROVAL BASIS –

TSO Approval. C50c, C35d

The PMA8000-SR-series Audio Selector Panels are FAA approved under TSO C50c (Audio Amplifiers) and TSO C35d (Marker Beacon Receivers).

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.

1.5 SPECIFICATIONS

TSO COMPLIANCE

Marker Beacon: C35d, Class A Audio Selector/Intercom: C50c, Class A

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 8.25 in. (21.00 cm) including connectors

WEIGHT

PMA8000-SR Unit Rack with connectors

1.54 lb. (0.70 kg)

0.66 lb. (0.30 kg)

POWER REQUIREMENTS (Including Internal Lighting):

Voltage: 11 to 33 VDC Maximum Current: 3.0 Amp (Externally protected by a 5A pull-type

breaker)

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PMA8000-SR Series Audio Selector Panel and Intercom System

Installation and Operator’s Manual

PS Engineering

Audio Selector Specifications

Audio selector panel input impedance:

510 Ω

Input Isolation: -60 dB (min.) Speaker Muting: -60 dB (min.) Speaker Output (into 4 Ω) with no clipping

14 VDC: 28 VDC:

3 Watts (min.) 10 Watts (min.)

Receiver Inputs: 9 (Com 1, Com 2, TEL, Nav 1, Nav 2, ADF,

DME, MKR, AUX)

Unswitched Inputs: 4 Transmitter Selections: 4 (Com 1, Com 2, TEL

Com1/2)

Speaker Impedance: Headphone Impedance:

4 Ω 150 – 1000 Ω

Headphone Output: 38 mW each headset, no clipping <1% THD typi-

cal

Microphone Impedance:

150 - 600 Ω

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: 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:

Selectivity: -6 dB at ±10 kHz

External Lamp Output: 7.5 (±4 VDC unloaded, at maximum brightness) VDC

MM Sense: Active high (4.5 ± 1.0VDC)

<1% THD @ 38 mW into 150Ω

Capable of: (preset at factory for field application) 1000 µVolts (Hard) (360 to 570 µV soft) 200 µVolts (Hard) (130 to 200 µV soft)

-40 dB at ±120 kHz

positive when active, max. current 125 mA

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PMA8000-SR Series Audio Selector Panel and Intercom System

Installation and Operator’s Manual

1.6 EQUIPMENT SUPPLIED

1 ea. of the following units:

Model Description Part Number

PS Engineering

PMA8000-SR PMA8000-SR Audio Panel with Marker Beacon and Stereo

intercom.

PMA8000-SR with option 1 Add Internal recorder to PMA8000-SR 050-880-0200

PMA8000 Installation Kit: 250-880-0000

Description Quantity Part

PMA8000-SR installation rack assembly 1 430-880-0040 PMA8000-SR Rack back plate assembly w/coax 1 010-880-1481

44-pin connector kit 2 120-891-2045Backshell, connector 2 625-025-2465 Backshell Retainer 2 431-881-0100 4 40 X 3/8 screw w/lock washer 4 475-440-1038 4 40 X 7/16 screw w/nylon patch 4 475-440-0007 4-40 Lock Nut 1 475-013-0001 Solder Lug 1 475-009-0001 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 SIRIUS Satellite Antenna w/ cable 1 510-880-0100 PMA8000-SR remote 1 050-803-0200

1.7 EQUIPMENT REQUIRED BUT NOT SUPPLIED

a. Circuit Breaker: 1 ea; 5 amp PULL TYPE REQUIRED for PMA8000-SR a) Speaker, 4 Ω b) Headphone Jacks (Stereo, as Required) c) Microphone Jacks (as Required) d) Headphones, 150 Ω (Stereo), up to 6 as required e) Microphones, up to 6 as required f) Marker Antenna (75 MHz, VSWR <1:1.5, and appropriate for the airspeed)

g) Interconnect Wiring

1.8 Required Test equipment to check installation

050-880-0100

Number

Marker Beacon signal generator, such as:

a. IFR NAV401L, NAV402AP, IFR4000

b. TIC T-30D, T-36C

1.9 LICENSE REQUIREMENTS

None

1.8 SIRIUS SUBSCRIPTION REQUIREMENTS

The Sirius Satellite Receiver requires an activation and periodic subscription. Monthly, annual and lifetime plans are available.

To activate the module, you will need to do the following:

• Locate the SID/ESN number from your SIRIUS receiver in the PMA8000-SR (found on the unit or played back, by pressing 4-1-1 with Sirius system turned on).

• A major credit card.

• The SIRIUS tuner installed, the aircraft outside with a clear view of the sky.

• Turn your SIRIUS tuner on and tune it to channel 184.

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PMA8000-SR Series Audio Selector Panel and Intercom System

Installation and Operator’s Manual

When you activate online you pay only $5.00 at www.sirius.com. If you choose to activate by phone the charge is $15. You can either call 1.888.539.SIRIUS (7474) or activate online.

Keep in mind that there may be additional fees when you activate, based on the following criteria:

• $5 charge to reactivate a receiver that has been inactive for over six months.

• $5 late fee for monthly payments made after bill due date.

• Printed copies of account information less than 18 months old cost $2.50 per request.

• Printed copies of account information more than 18 months old cost $10 per request.

• Termination of service prior to the end of a prepaid subscription or committed subscription period

will result in a $75 cancellation fee. Fee does not apply for monthly plans.

• You are responsible for all taxes or other government fees and charges, if any, based on the address on your account.

NOTE: Prices subject to change without notice

PS Engineering

Record your Radio ID here for future reference.

_________________________________

Press 4-1-1 on remote with SIRIUS Satellite Radio turned on to read back the SID.

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PMA8000-SR Series Audio Selector Panel and Intercom System

Installation and Operator’s Manual

PS Engineering

Section II - Installation

2.1 GENERAL INFORMATION

2.1.1 SCOPE

This section provides detailed installation and interconnection instructions for the PS Engineering PMA8000-SR-Series 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 and knowledge.

2.1.2 Certification Requirements

NOTE

The PMA8000-SR 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-qualified

individual or agency will void the warranty, may result in an unairworthy installation,

and violate Federal Aviation regulations.

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 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 PMA8000-SR 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

The PMA8000-SR must be rigidly mounted to the instrument panel of the aircraft structure and within view and reach of the pilot position(s). Installation must comply with FAA Advisory Circular AC 43.132A. The unit may be mounted in any area where adequate clearance for the unit and associated wiring bundle exist.

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.

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PMA8000-SR Series Audio Selector Panel and Intercom System

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PS Engineering

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. 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.

2.3.4 Audio Panel Tray and Connector Assembly

The rack connectors mate with two 44-pin connectors in the PMA8000-SR. 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 through to the back shell clamp (431-881-0100). 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 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 43.13-2A 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 PMA8000-SR 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 PMA8000-SR 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 PMA8000-SR 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 2- or 3-conductor, shield wire as shown on the installation-wiring diagram.

The shields can be daisy-chained together, and then connected to a ground lug mounted on the corner of the back plate.

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PMA8000-SR Series Audio Selector Panel and Intercom System

Installation and Operator’s Manual

PS Engineering

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.

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 Existing GMA340 Installation

In order to replace the GMA340 with a PMA8000SR, the unit tray must be removed and replaced with the new PMA8000 tray. The connectors can be reused. You will have to replace the back plate (430-880-0050) and connect the Satellite Radio antenna to the RF connector (425-880-3003).

2.4.2.1 J2, Pin 30 GMA340

Some GMA340 installations may have a ground strap on J2, Pin 30, Com TX mute.” THIS CONNECTION MUST BE REMOVED.

If the PMA8000 installation is routing the SIRIUS Satellite Radio audio externally, this pin is reused as Satellite Radio Audio Right channel. If the Satellite Radio remains internal, this pin must be disconnected

2.4.3 Power

The PMA8000-SR-Series are compatible with both 14 and 28 Volt DC systems. A five (5) Amp circuit breaker is required for all installations. Power and ground wires must be a twisted

#22 AWG pair connected to J2 Pins 8 and 9. Connect airframe ground to J2 Pin 10 and 11 only. No dropping resistors are required.

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 aircraft 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 PMA8000-SR is

OFF/EMG mode.

in the

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 PMA8000-SR is designed to interface with standard aircraft avionics, and presents a 500Ω 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.

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.

2.4.5.1 Speaker Load

The PMA8000-SR 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.

200-880-0000 Page 2-3 Rev. 13, July 2006

PMA8000-SR Series Audio Selector Panel and Intercom System

Installation and Operator’s Manual

PS Engineering

Connect the speaker output from the unit to the COM 2 Speaker load input on the PMA8000-SR (J1 27 WRT 28). The speaker load is 16 Ω, 3W.

2.4.6 TEL (Duplex) Function for Cell Phones

This mode is designed to operate with telecommunications systems, such as the AirCell Guardian 1000. Audio streams selected by the intercom mode are provided to the Tel output, and audio from Tel is presented to the headset. This allows a telephone-like audio interface.

The TEL mode in the PMA8000-SR is also compatible with many cellular telephones with hands-free headset interfaces. A 1/8” or 3/32” jack can be installed on the aircraft panel, and interfaces with the PMA8000-SR as shown: A patch cord (3/32” to 3/32”) is available from PS Engineering under P/N 425006-7026.

Cellular Plug (typical) Tip= Microphone out Ring= Speaker audio Base=Ground

Com 3 Audio

COM 3 Mic Input

Audio Lo

Cellular Phone Interconnect

3/32" Cellular Jack

This is a typical interconnect PS Engineering does not guarantee compatability in all cases.

Figure 2-1 Cellular telephone interface

Unauthorized use of unapproved cellular telephone devices in aircraft is subject to FCC enforcement

action, which may include a $10,000 fine per incident. 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.

2.4.7 Transmit Interlock

Some communications transceivers use a transmit-interlock system. To fully utilize the Split Mode feature, this function must be disabled. Consult that manufacturer's installation manual.

2.4.8 Patented "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. The transfer of TX indication from Com 1 to Com 2 shows that the swap has been initiated; there is no dedicated swap indicator.

2.4.9 Backlighting

The PMA8000-SR has an automatic dimming of the pushbutton annunciation LEDs and marker lamps controlled by a photocell. Control of the unit backlighting is through the aircraft avionics dimmer For 14 V 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.

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 (J1, pin 8 or 9) for the back

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