PS Engineering PMA8000B Installation Manual

9800 Martel Road

Lenoir City, TN 37772

www.ps-engineering.com

PMA8000B

Document P/N 200-890-0100

For serial numbers X04822 and below

Rev. 13, December 2009

Audio Selector Panel with Marker Beacon Receiver

High-fidelity Stereo Intercom

System Installation and Operation Manual

FAATSO 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

In certified aircraft, warranty is not valid unless this product is installed by an Authorized PS Engineering dealer.

PS Engineering, Inc. 2009 ©

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 [phone], email [e-mail].

			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		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			NOISE .......................................................................................................................................	2-2
2.4.2			EXISTING GMA340 INSTALLATION ............................................................................................	2-3
2.4.3			POWER .....................................................................................................................................	2-3
2.4.4			COMMUNICATIONS PUSH-TO-TALK ............................................................................................	2-3
2.4.5 AUDIO PANEL INTERFACE ..........................................................................................................				2-3
2.4.6 TEL (DUPLEX) FUNCTION FOR CELL PHONES .............................................................................				2-4
2.4.7			TRANSMIT INTERLOCK...............................................................................................................	2-4
2.4.8 "SWAP" MODE ..........................................................................................................................				2-5
2.4.9			BACKLIGHTING .........................................................................................................................	2-5
2.4.10			UNSWITCHED INPUTS...............................................................................................................	2-5
2.4.11 PUBLIC ADDRESS MODE ..........................................................................................................				2-6
2.4.12 PA MUTE (J2, PIN 12) .............................................................................................................				2-7
2.4.13 MISCELLANEOUS LOGIC OUTPUT (J2, PIN 18) ...........................................................................				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 ....................................................................				2-8
2.5.4			PLAYBACK BUTTON INSTALLATION ............................................................................................	2-9
2.6	MARKER BEACON INSTALLATION ...............................................................................................			2-9
2.6.1 MARKER ANTENNA INSTALLATION ............................................................................................				2-9
2.6.2 EXTERNAL MARKER LIGHTS ......................................................................................................				2-9
2.6.3 MIDDLE MARKER SENSE............................................................................................................				2-9
2.7		ADJUSTMENTS .............................................................................................................................		2-9
2.8	COMMUNICATIONS ANTENNA INSTALLATION NOTES ................................................................			2-11
2.8.1			AUDIO ACTIVE OUTPUT ...........................................................................................................	2-11
2.9		PMA8000B PIN ASSIGNMENTS ..................................................................................................		2-12
2.10			POST INSTALLATION CHECKOUT .............................................................................................	2-13
2.11			UNIT INSTALLATION ................................................................................................................	2-13
2.12			OPERATIONAL CHECKOUT ......................................................................................................	2-13
2.12.1			REQUIRED TEST EQUIPMENT..................................................................................................	2-13
2.12.2			AUDIO PANEL TEST ...............................................................................................................	2-13

PS Engineering

PMA8000B Audio Selector Panel and Intercom System

Installation and Operator’s Manual

2.12.3				MARKER CHECKOUT .............................................................................................................			2-14
2.12.4				TEL CHECKOUT ....................................................................................................................			2-14
2.12.5 INTERNAL RECORDER CHECKOUT ..........................................................................................							2-14
2.12.6 FUNCTION BUTTON CHECKOUT..............................................................................................							2-14
2.13			FINAL INSPECTION...................................................................................................................				2-14
	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		TELEPHONE (TEL) (9).................................................................................................................					3-2
3.5		SPEAKER AMPLIFIER (5)..............................................................................................................					3-3
3.6		MARKER BEACON OPERATION (10).............................................................................................					3-3
3.7		INTERCOM OPERATION ...............................................................................................................					3-4
3.7.1				INTELLIVOX® VOX-SQUELCH ....................................................................................................			3-4
3.7.2 INTERCOM VOLUME CONTROL (7)..............................................................................................							3-4
3.7.3 INTERCOM MODES (8) ...............................................................................................................							3-5
3.8		MUSIC MUTING (6)......................................................................................................................					3-5
3.9		TELEPHONE MODE (9).................................................................................................................					3-6
3.10			UTILITY JACK ...........................................................................................................................				3-7
3.10.1				CELLULAR PHONE....................................................................................................................			3-7
3.10.2				AUDIO ADVISORY INPUT..........................................................................................................			3-7
3.10.3				MUSIC INPUT ..........................................................................................................................			3-8
3.10.4 SMART FUNCTION KEYS (SFK)................................................................................................							3-8
3.10.5				FUNCTION “A”........................................................................................................................			3-9
3.10.6				FUNCTION “B” ......................................................................................................................			3-10
3.10.7				FUNCTION “C” ......................................................................................................................			3-10
3.10.8 MUSIC 1 VOLUME..................................................................................................................							3-11
3.11			INTERNAL RECORDER .............................................................................................................				3-11
3.11.1				PLAYBACK		............................................................................................................................	3-12
	Section IV – Warranty and Service ...................................................................................................						4-1
4.1		WARRANTY .................................................................................................................................					4-1
4.2		FACTORY SERVICE ......................................................................................................................					4-1
	Appendix A – External PTT Hook Up .................................................................................................						A
	Appendix B – PMA 8000 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
9.1		INSTRUCTIONS ......................................................................FOR FAA FORM 337, AUDIO PANELS					E
9.2		INSTRUCTIONS ..............................................FOR CONTINUING AIRWORTHINESS, AUDIO SYSTEM					E
	Appendix F – RTCA DO160D Environmental Qualification Form ......................................................						F
	Rev			Date		Change
	1			10/31/05		1 st Release of new utility jack units
	2			01/19/06		Changed functionality of Function A at S/N J01861
	3			02/01/06		Updated for Unswitched 4 low, differential music notes, annunciation & playback.
	4			06/08/06		Changed operation on IRS playback Section 3.12.1
	5			05/30/06		Added back shell retainer
	6			03/06/07		Updated cover
	7			9/27/07		Clarified the unswitched audio distribution in Section 2.4.10
	9			8/11/08		Clarified backlighting connection
	10			11/20/08		Added info on PA jumper
	11			12/15/08		Clarified music jack grounding
	12			2/16/09		Updated IRS Operation
	13			12/03/09		Added Multiple Music Muting Modes , TEL sidetone control, ISO music control

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PMA8000B Audio Selector Panel and Intercom System

Installation and Operator’s Manual

Section I – GENERAL INFORMATION

1.1INTRODUCTION

The PMA8000B represents another evolutionary step in cockpit audio control and intercommunications utility. Using our patented IntelliVox® design, front panel utility jack, and pilot programmable configur a- tions, this marks the next level of audio control. 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 PMA8000B.

1.2SCOPE

This manual provides detailed installation and operation instructions for the PS Eng ineering PMA8000Bseries of Audio Selector Panel/Intercom Systems. This includes the following units:

Model	Description	Part Number
PMA8000B	Stereo Audio Selector Panel with Marker Beacon, includes	050-890-0202
	utility jack and Internal Recorder System

1.3EQUIPMENT DESCRIPTION

The PMA8000B is a state-of-the-art audio isolation amplifier and audio selector that contains an aut o- matic voice activated (VOX) intercom system and integral marker beacon receiver. 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 PMA8000B to act as an audio interface between aircraft headphone and microphones and specific aircraft approved (FAA/FCC) cellular telephone equipment, through the front mounted jack.

Warning: Use of non-aviation approved cellular telephone equipment may be prohibited by regulation. PS Engineering is not responsible for unauthorized airborne use of cellular telephones.

For airborne use, the PMA8000B must be interfaced with an approved system.

There are five unswitched inputs, available for traffic or EGPWS, autopilot disconnect, and/or radar a l- timeter warning, with the fifth unswitched input through a front-mounted utility jack, when configured to act as a fifth unswitched input.

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 for the pilot and copilot position, and allows radio transmission. In "Split Mode" the PMA8000B 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. Unswitched input #1 is also provided to the pilot headphone in fail -safe

A six-station voice activated (VOX) intercom is included in the PMA8000B. This system has PS Engineering’s patented IntelliVox® circuitry that eliminates manual adjustments. The intercom system inco r- porates 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.

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Installation and Operator’s Manual

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

A 3-light, 75 MHz Marker Beacon receiver is integrated in the PMA8000B. This provides the necessary Marker Beacon lights and audio indications necessary for that portion of an Instrument Land ing System (ILS) approach. A pushbutton labeled MKR allows the pilot select high or low sensitivity as well as test and mute modes.

1.4APPROVAL BASIS

FAA TSO Approval.

The PMA8000B-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 oper a- tion.

1.5SPECIFICATIONS

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	1.34 lb. (0.61 kg)
PMA8000B Unit
Rack with connectors	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)

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PMA8000B Audio Selector Panel and Intercom System

Installation and Operator’s Manual

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			3 Watts (min.)
14 VDC:
28 VDC:			10 Watts (min.)
Receiver Inputs:			9 (Com 1, Com 2, TEL, Nav 1, Nav 2, ADF, DME,
			MKR, AUX)
Unswitched Inputs:			5 (including front jack)
Transmitter Selections:			4 (Com 1, Com 2, TEL
			Com1/2)
Speaker Impedance:			4
Headphone Impedance:			150 – 1000
Headphone Output:			38 mW each headset, no clipping <1% THD typical
Microphone Impedance:			150 - 600
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:		Capable of: (preset at factory for field application)
Low:		1000 Volts (Hard) (360 to 570 V soft)
High:		200 Volts (Hard) (130 to 200 V soft)
Selectivity:		-6 dB at ±10 kHz
		-40 dB at ±120 kHz
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)

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Installation and Operator’s Manual

1.6EQUIPMENT SUPPLIED

1 ea. of the following units:

		Model			Description				Part Number
	PMA8000B			PMA8000B Audio Panel with Marker Beacon and Stereo intercom.					050-890-0202
PMA8000B Installation Kit: 250-890-0000
				Description		Quantity			Part
									Number
		PMA8000B installation rack assembly				1		430-890-0040
		PMA8000B Rack back plate				1		430-890-0050
		44-pin connector kit				2		120-891-2045-
		Backshell, connector				2		625-025-2465
		Backshell Retainer				2		431-881-0100
		4 40 X 7/16 screw w/nylon patch				4		475-440-0007
		4 40 X 3/8 screw w/lock washer				4		475-440-1038
		4-40 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

1.7EQUIPMENT REQUIRED BUT NOT SUPPLIED

a.Circuit Breaker: 1 ea; 5 amp PULL TYPE REQUIRED for PMA8000B

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

1.8OPTIONAL ITEMS

a.	Cell Phone Patch Cord, 2.5mm to 2.5mm, PS Part Number	425-006-7026
b.	Music Patch Cord, 3.5mm to 5.5mm, PS Part Number	425-006-2535

1.9LICENSE REQUIREMENTS

None

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PMA8000B Audio Selector Panel and Intercom System

Installation and Operator’s Manual

Section II - INSTALLATION

2.1GENERAL INFORMATION

2.1.1SCOPE

This section provides detailed installation and interconnectio n instructions for the PS Engineering PMA8000B 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).

2.1.2Certification Requirements

NOTE

The PMA8000B requires specialized knowledge and tools for an effective installation. An appropriately rated Certified Aircraft Repair Station must install this equipment in accordance with applicable regul a- tions. PS Engineering, Incorporated warranty is not valid unless the equipment is installed by an autho r- ized 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.

2.2Unpacking 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 shipp ing 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.

2.3Equipment Installation Procedures

2.3.1Cooling Requirements

Forced air-cooling of the PMA8000B 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.

2.3.2Mounting Requirements

The PMA8000B must be rigidly mounted to the instrument panel of the aircraft structure, within view and reach of the pilot position(s). Installation must comply with FAA Advisory Circular AC 43.13 -2A. 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.

2.3.3Audio 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

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PMA8000B Audio Selector Panel and Intercom System

Installation and Operator’s Manual

FHP 6-32 x ½" screws (475-632-0012). The audio selector panel must be supported at front and rear of the mounting tray.

2.3.4Audio Panel Tray and Connector Assembly

The rack connectors mate with two 44-pin connectors in the PMA8000B. The connectors are a subminiature crimp-type, and require the use a hand crimp tool, from table below (or equiv.). The connectors are mounted to the tray back plate with #4-40 screws (475-440-1038), from the inside of the tray and the mounting block, 431-891-0100. Ensure that proper strain relief and chafing precautions are made during wiring and installation, using the cable clamp (625-001-0002).

Manufacturer	Crimping Tool	Positioner	Extraction tool
AMP	601966-1	601966-6	91067-1
Daniels	AFM8	K42	M24308-1
ITT-Cannon	995-0001-584	995-0001-739	91067-1

Table 2-1 Connector Pin crimping tools

2.4Cable 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. Twoand 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.

2.4.1Noise

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 PMA8000B 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 conne c- tor, J2 pins 8 & 9, of the PMA8000B 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 PMA8000B 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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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

PMA8000B units above Serial Number J01861 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 PMA8000B. 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.

2.4.2Existing GMA340 Installation

If the installation replaces a GMA340, no changes are necessary as long as the existing installation meets the requirements. All existing functions of the GMA340 as well as all of the new capabilities afforded by the PMA8000B will become instantly available. Be advised, the PMA8000B does not support 3 VHF Coms, however. The PMA8000B handles two COM transceivers and a full-duplex cellular/satellite telephone.

Added capabilities include, IntelliVox®, DuTel™ duplex telephone, improved musi c fidelity and Soft Mute™ and Karaoke™ muting modes, improved and more flexible music distribution control, internal recorder function, and additional unswitched audio inputs.

2.4.3Power

The PMA8000B 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. Connect airframe ground to J2 Pin 10 and 11 only. No dropping resistors are required.

2.4.4Communications 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 PMA8000B is in the OFF/EMG mode.

CASE I: PTT is built into both pilot and copilot yokes.

CASE II: PTT is in pilot yoke only. This configuration requires a modified external PTT switch plugged into the copilot's microphone jack. (See Appendix A). When the copilot's PTT is pressed, the intercom switches the microphone audio from pilot to copilot mic.

CASE III: No built in PTT. This requires two built in PTTs to be installed, or modified external PTT switches to be used. Modify external PTT as required. See Appendix A.

2.4.5Audio Panel interface

The PMA8000B is designed to interface with standard aircraft avionics, and presents a 510 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.

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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 PMA8000B 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 PMA8000B (J1 27 WRT 28). The speaker load is 16 , 3W.

2.4.6TEL (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 pr e- sented to the headset. This allows a telephone-like audio interface.

The TEL mode in the PMA8000B is also compatible with many cellular telephones with hands-free headset interfaces. The front panel 3/32” utility jack can be used as the interface to the Cell Phone, or a 3/32” jack can be installed somewhere on the aircraft panel. The wired interface jack is connected with the PMA8000B as shown: A patch cord (3/32” to 3/32”) is available from PS Engineering under P/N 425- 006-7026.

Cellular Plug (typical)

Tip= Microphone out

Ring= Speaker audio

Base=Ground

Com3 Audio

COM 3MicInput

AudioLo

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 for rear connector, if an additional jack is desired

2.4.6.1 Cell phone Sidetone

As shipped from PS Engineering, the PMA8000B does NOT provide cellular telephone sidetone (the user’s voice fed back to the headset). Some cell phones do not provide sidetone. In PMA8000B MP3 Avidyne audio panels above serial number W04748, Telephone sidetone can be enabled by pressing the TEL and ADF buttons for more than one second. For units with serial number W04747 and below, an internal modification can be made that will allow the PMA8000B to provide sidetone. Cont act PS Engineering for more information.

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. 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.

2.4.7Transmit 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 ma nual.

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PS Engineering

PMA8000B Audio Selector Panel and Intercom System

Installation and Operator’s Manual

2.4.8"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.

2.4.9Backlighting

The PMA8000B 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 nigh t- time viewing. Pin 6 or 7 (depending on system voltage) must be tied to power (J2, pin 8 or 9) for the back lighting system to work. The photocell mounted in the unit face will automatically adjust the inte nsity of the push-button annunciator LEDs.

2.4.10 Unswitched inputs

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 and copilot 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, autopilot disconnect tones, or any other critical audio signal. Unswitched #1 is always presented to the speaker, plus to the crew headphones, and is available to the pilot in fail -safe (off) mode. Unswitched 3 and 4 inputs are always presented to the crew headphones and to the aircraft speaker.

Unswitched	Hear in	Hear in	SPR button	Gain
Input	Fail Safe	Crew Headset	Select
1	Yes	Yes	No	1:1(fixed)
2	No	Yes	Yes	1:1(fixed)
3	No	Yes	No	Adjustable
4	No	Yes	No	1:1(fixed)
5 (jack)	No	Yes	No	1:1(fixed)

Table 2-2 Unswitched input table

Unswitched #2, J1 pin 44 is unswitched is always connected to the Pilot’s headphone. However, this unswitched audio is only presented to the aircraft speaker when the SPR push button has been selected. This input would be suitable for air-to-ground (Flitefone) telephone ringer. This input is not related to the cellular telephone interface.

The audio low for unswitched #4 (J2, pin 15) should be connected to a convenient audio low. However, this should NOT be connected to Music Low.

Unswitched #1 is presented to the pilot headphone in fail-safe (off) mode.

NOTE

Inputs 1, 2 and 4 are fixed (1:1), and any audio level adjustments must be made at the input source. Unswitched #3 has a variable adjustment control located on the bottom side of the unit. This control allows you to 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.

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