9800 Martel Road
Lenoir City, TN 37772
www.ps-engineering.com
Document P/N 200-890-1702
Revision, New, April 2011
For use with PMA8000BT units serial number CBT1561 and above
Audio Selector Panel with Marker Beacon Receiver
High-fidelity Stereo Intercom
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. 2011 ©
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 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 REQUIREDBUT NOTSUPPLIED....................................................................................... 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 COOLINGREQUIREMENTS............................................................................................................... 2-1
2.3.2 MOUNTING REQUIREMENTS............................................................................................................ 2-1
2.3.3 AUDIO PANEL MOUNTINGRACK INSTALLATION............................................................................. 2-1
2.3.4 AUDIO PANEL TRAY AND CONNECTOR ASSEMBLY......................................................................... 2-2
2.4 CABLE HARNESS WIRING ...................................................................................................................................2-2
2.4.1 ELECTRICALNOISE......................................................................................................................... 2-2
2.4.2 EXISTINGGMA340 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 TRANSMIT INTERLOCK.................................................................................................................... 2-4
2.4.7 BACKLIGHTING............................................................................................................................... 2-4
2.4.8 UNSWITCHED INPUTS...................................................................................................................... 2-4
2.4.9 "SWAP" MODE................................................................................................................................ 2-5
2.4.10 TEL (DUPLEX) FUNCTION FOR CELLPHONES .............................................................................. 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
2.4.14 AUDIO ACTIVE OUTPUT................................................................................................................ 2-7
2.5 INTERCOM WIRING..............................................................................................................................................2-7
2.5.1 ENTERTAINMENT INPUTS................................................................................................................ 2-8
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
2.9 PMA8000BT PIN ASSIGNMENTS ...................................................................................................................... 2-12
2.10 WIRING 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
2.12.3 MARKER CHECKOUT .................................................................................................................. 2-14
2.12.4 TEL CHECKOUT......................................................................................................................... 2-14
2.12.5 INTERNAL RECORDER CHECKOUT .............................................................................................. 2-14
PS Engineering
PMA8000BT Audio Selector Panel and Intercom System
Installation and Operator’s Manual for units with serial number CBT1561 and above
200-890-1702 Page ii April 2011
2.12.6 FUNCTION BUTTON CHECKOUT..................................................................................................2-14
2.13 FINAL INSPECTION..........................................................................................................................................2-14
Section III OPERATION
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
3.4.1 CELL PHONE SIDETONE................................................................................................................... 3-3
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 AND MUSIC MUTING (6).......................................................................................................................... 3-5
3.8.1 MUSIC IN PILOT ISO MODE............................................................................................................. 3-6
3.9 TELEPHONE MODE (9)........................................................................................................................................3-6
3.9.1 CELLULAR TELEPHONE SIDETONE ................................................................................................... 3-7
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................................................................................................................................ 3-7
3.11 SMART FUNCTION KEYS (SFK)........................................................................................................................3-8
3.11.1 “INTERCOM” ALTERNATE INTERCOM FUNCTION (A)...................................................................... 3-8
3.11.2 MONITOR (B) ............................................................................................................................... 3-9
3.11.3 MUSIC (C).................................................................................................................................... 3-9
3.11.4 MUSIC 1 VOLUME....................................................................................................................... 3-10
3.11.5 POWER ON ANNOUNCEMENT ...................................................................................................... 3-10
3.12 BLUETOOTH® INTERFACE.............................................................................................................................. 3-10
3.12.1 PAIRING AND UNPAIRING BLUETOOTH DEVICES.......................................................................... 3-11
3.12.2 LAST NUMBER REDIAL............................................................................................................... 3-11
3.12.3 SPEED DIAL................................................................................................................................ 3-11
3.12.4 BLUETOOTH MUSIC CONTROL..................................................................................................... 3-12
3.13 INTERNAL RECORDER AND PLAYBACK ........................................................................................................... 3-12
Section IV – Warranty and Service
4.1 WARRANTY......................................................................................................................................................... 4-1
4.2 FACTORY SERVICE..............................................................................................................................................4-1
Appendix A – External PTT Hook Up ....................................................................................A
Appendix B – PMA8000 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 FAAFORM 337, AUDIO PANELS............................................................................................E
9.2 INSTRUCTIONS FOR CONTINUING AIRWORTHINESS, AUDIO SYSTEM ....................................................................E
Appendix F – RTCA DO160D Environmental Qualification Form ....................................A
Rev
Date
Change
0
4/1/ 2010
New Release of manual p/n --01702, for PMA8000BT
PS Engineering
PMA8000BT Audio Selector Panel and Intercom System
Installation and Operator’s Manual for units with serial number CBT1561 and above
200-890-1702 Page 1-1 New, April 2011
Section I – GENERAL INFORMATION
1.1 INTRODUCTION
The PMA8000BT 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.
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 PMA8000BT.
1.2 SCOPE
This manual provides detailed installation and operation instructions for the PS Engineering PMA8000BTseries of Audio Selector Panel/Intercom Systems. This includes the following units:
Model
Description
Part Number
PMA8000BT
Stereo Audio Selector Panel with Marker Beacon, includes
utility jack and Internal Recorder System
050-890-0702
1.3 EQUIPMENT DESCRIPTION
The PMA8000BT 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 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 PMA8000BT 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 byFCCregulation.
PS Engineering is not responsible for unauthorized airborne use of cellular telephones.
For airborne use, the PMA8000BT 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 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 PMA8000BT 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 (Fail-safe)
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 PMA8000BT. This system has PS Engi-
neering’s patented IntelliVox® circuitry that eliminates manual adjustments. The intercom system incorpo-
rates 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
PS Engineering
PMA8000BT Audio Selector Panel and Intercom System
Installation and Operator’s Manual for units with serial number CBT1561 and above
200-890-1702 Page 1-2 New, April 2011
small volume knob controls the intercom level for the pilot and copilot, while the large knob controls the
passenger intercom volume. Intercom squelch is automatic.
A 3-light, 75 MHz Marker Beacon receiver is integrated in the PMA8000BT. 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 PMA8000BT, a Bluetooth® wireless interface is available for wireless telephone and music connection.
1.4 APPROVAL BASIS
FAA TSO Approval.
The PMA8000BT-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.
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
PMA8000BT 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)
PS Engineering
PMA8000BT Audio Selector Panel and Intercom System
Installation and Operator’s Manual for units with serial number CBT1561 and above
200-890-1702 Page 1-3 New, April 2011
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, 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
Bluetooth Radio (PMA8000BT -1702 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
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)
PS Engineering
PMA8000BT Audio Selector Panel and Intercom System
Installation and Operator’s Manual for units with serial number CBT1561 and above
200-890-1702 Page 1-4 New, April 2011
1.6 EQUIPMENT SUPPLIED
1 ea. of the following units:
Model
Description
Part Number
PMA8000BT
PMA8000BT Audio Panel with Marker, Stereo Intercom, and
Bluetooth connectivity
050-890-1702
PMA8000BT Installation Kit: 250-890-0000
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 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/nylon patch
4
475-440-1038
4-40 x ¼” screw with lock washer
2
475-440-0001
Solder Lug
2
475-009-0001
Cable Clamp
1
625-001-0002
#6-32 x ½” Flat head Philips screw
6
475-632-0012
#6-32 Clip Nut
6
475-630-0002
1.7 EQUIPMENT REQUIRED BUT NOT SUPPLIED
a. Circuit Breaker: 1 ea; 5 amp PULL TYPE REQUIRED for PMA8000BT
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. Cell Phone Patch Cord, 2.5mm to 2.5mm, PS Part Number 425-006-7026
b. Music Patch Cord, 3.5mm to 2.5mm, PS Part Number 425-006-2535
c. Phone patch cord for iPhone or Blackberry 3.5 mm 4-conductor to 2.5 mm
(Phone only, no music) 425-006-0354
1.9 LICENSE REQUIREMENTS
None
PMA8000BT (050-890-1702 only) 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
PMA8000BT Audio Selector Panel and Intercom System
Installation and Operator’s Manual for units with serial number CBT1561 and above
200-890-1702 Page 2-1 New, April 2011
Section II - INSTALLATION
2.1 GENERAL INFORMATION
2.1.1 SCOPE
This section provides detailed installation and interconnection instructions for the PS Engineering
PMA8000BT 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 PMA8000BT 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 (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 PMA8000BT 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 PMA8000BT 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 43.13-2B, 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. 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-
PS Engineering
PMA8000BT Audio Selector Panel and Intercom System
Installation and Operator’s Manual for units with serial number CBT1561 and above
200-890-1702 Page 2-2 New, April 2011
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 PMA8000BT. 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).
Two grounding lugs are provided, which may be attached to the rear mounting plate with 2 ea #4-40 x ¼”
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 PMA8000BT 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 PMA8000BT 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 PMA8000BT 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.
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.
PS Engineering
PMA8000BT Audio Selector Panel and Intercom System
Installation and Operator’s Manual for units with serial number CBT1561 and above
200-890-1702 Page 2-3 New, April 2011
2.4.1.1 Music Inputs and Noise
PMA8000BT 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 PMA8000BT.
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 Existing 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 PMA8000BT will become instantly available. Be advised, the PMA8000BT does not support 3 VHF
Coms, however. The PMA8000BT handles two COM transceivers and a full-duplex cellular/satellite telephone.
Added capabilities include, IntelliVox®, DuTel™ duplex telephone, improved music fidelity and Soft
Mute™ and Karaoke™ muting modes, improved and more flexible music distribution control, internal recorder function, and additional unswitched audio inputs.
Installations where the external marker outputs are connected to a Sandel 3308 Navigation Display will
require additional loading resistors. Refer to the Sandel installation data for more information.
2.4.3 Power
The PMA8000BT 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.
2.4.4 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 PMA8000BT is in
the OFF/EMG mode.
CASE I: PTT is built into both pilot and copilot yokes.
CASE II: PTT is in pilot yoke only. This configuration requires a modified external PTT switch plugged
into the copilot's microphone jack. (See Appendix A). When the copilot's PTT is pressed, the intercom
switches the microphone audio from pilot to copilot mic.
CASE III: No built in PTT. This requires two built in PTTs to be installed, or modified external PTT
switches to be used. Modify external PTT as required. See Appendix A.
2.4.5 Audio Panel interface
The PMA8000BT 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.
PS Engineering
PMA8000BT Audio Selector Panel and Intercom System
Installation and Operator’s Manual for units with serial number CBT1561 and above
200-890-1702 Page 2-4 New, April 2011
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 PMA8000BT 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 PMA8000BT (J1 27
WRT 28). The speaker load is 16 , 3W.
2.4.6 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.
2.4.7 Backlighting
The PMA8000BT 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 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.
2.4.8 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
Input
Hear in
Fail Safe
Hear in
Crew Headset
SPR button
Select
Gain
1
Yes
Yes
No
1:1(fixed)
2NoYes
Yes
1:1(fixed)
3NoYes
No
Adjustable
4NoYes
No
1:1(fixed)
5 (jack)NoYes
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.
PS Engineering
PMA8000BT Audio Selector Panel and Intercom System
Installation and Operator’s Manual for units with serial number CBT1561 and above
200-890-1702 Page 2-5 New, April 2011
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.
2.4.9 "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.
2.4.10 TEL (Duplex) Function for Cell Phones
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 PMA8000BT is 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 jack can be
installed somewhere on the aircraft panel. The wired interface jack is connected with the PMA8000BT as
shown: A patch cord (3/32” to 3/32”) is available from PS Engineering under P/N 425-006-7026.
3/32" Cellular Jack
COM 3 Mic Input
Com 3 Audio
Audio Lo
Cellular Plug (typical)
Tip= Microphone out
Ring= Speaker audio
Base=Ground
This is a typical interconnect
PS Engineering does not guarantee
compatability in all cases.
Cellular Phone
Interconnect
Figure 2-1 Cellular telephone interface for rear connector, if an additional jack is desired
The PMA8000BT is compatible with most Bluetooth® enabled devices for making and receiving telephone
calls through the aircraft audio system. Visit www.ps-engineering.com/support to see a list of tested phones.
2.4.10.1Cell phone Sidetone
As shipped from PS Engineering, the PMA8000BT does NOT provide cellular telephone sidetone (the user’s voice fed back to the headset). Some cell phones do not provide sidetone. In PMA8000BT 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 PMA8000BT to provide sidetone. Contact 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.
FCC Regulation 47 CFR § 22.925 Prohibition on airborne operation of cellular telephones.
PS Engineering
PMA8000BT Audio Selector Panel and Intercom System
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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.
2.4.11 Public Address Mode
By pressing the Mute and SPR pushbuttons at the same time, the PMA8000BT 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.
2.4.11.1Public Address Output Jumper
1. Remove qty. 5 Phillip head screws from the PM8000BT. NOTE: THE SCREW IN THE REAR
OF THE PANEL IS A DIFFERENT LENGTH THAN THE OTHER FOUR. YOU MUST
PUT THE SHORTER LENGTH SCREW BACK IN THE SAME LOCATION OR
DAMAGE WILL OCCUR. See Figure #1.
Figure 2-2 Screw Locations
2. Move the blue jumper located in the back corner near the sub-D connectors on both pins of J4. See
Figure #2-3.
Long shaft screws
Short shaft screw
if installed
PS Engineering
PMA8000BT Audio Selector Panel and Intercom System
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200-890-1702 Page 2-7 New, April 2011
Figure 2-3 Jumper Location
4. Place the lid back on the unit, aligning holes.
5. Install and tighten qty. 4 long thread screws into the lid, and one short screw on the rear (if in-
stalled).
2.4.12 PA Mute (J2, Pin 12)
Pin 12 of J2 is a TTL logic output that is pulled low during PTT operation.
2.4.13 Miscellaneous Logic Output (J2, Pin 18)
Pin 18 of the J2 connector is pulled to ground whenever the AUX button is depressed. This serves as a control line for external devices, such as an entertainment system that the pilot wishes to control.
This pin can also be used to control passenger (Music 2) Karaoke Mode, by connecting to pin 13 of the J2.
NOTE
J2, Pin 18 should NOT be used if the AUX is going to be used to switch DME or auxiliary audio.
2.4.14 Audio Active Output
Pin 24 on the J1 connector (and PA Mute Pin 12 on J2) should be connected to Apollo CNX80 for audio
message prioritization, refer to CNX80 installation manual for details.
2.5 Intercom wiring
See Appendix C and D for intercom connection configurations. It is critical to the proper operation of this
system to have this connector wiring made in accordance with these diagrams. Use 2- and 3-conductor,
MIL-spec cable as shown. Connect the shields at the audio panel end only, and tie to the audio low inputs as
shown.
Jumper Off (no
PA mode)
Jumper On
(PA mode
enabled)
PS Engineering
PMA8000BT Audio Selector Panel and Intercom System
Installation and Operator’s Manual for units with serial number CBT1561 and above
200-890-1702 Page 2-8 New, April 2011
NOTE
The intercom harness can be custom made by PS Engineering, Inc. Simply call the factory or www.ps-
engineering.com to obtain a wire harness work sheet. The harness will be made to your specifications and
fully functionally tested. Harness can be ordered with jack, or without the intercom jacks installed, for easier wire routing through the aircraft.
2.5.1 Entertainment Inputs
The PMA8000BT has two INDEPENDENT music inputs, PLUS a front mounted jack that is connected to
Entertainment 1. Entertainment input number 1 is J2 pins 23 (left channel) and 24 (right channel), with respect to pin 25, and Entertainment number 2 is connected to 26 (left channel), 27 (right channel), with respect to 28.
PMA8000BT (050-890-1702) has wireless connectivity to stream music from a paired Bluetooth device.
This stream is distributed as Music 1. Refer to §3.11.3 for more information.
NOTE
Use the low level output of any additional entertainment device to connect to the a udio
panel. Maximum signal level is 3 VAC p-p. DO NOT use a speaker-level output, this
will cause internal damage in the audio panel.
2.5.2 Entertainment muting
The PMA8000BT-system incorporates a four-mode "Soft Mute™" system. This will mute the entertainment
devices during ICS and/or radio conversation. See Section 3.8 for more information.
Press the Mute switch to activate the four Karaoke modes (disabling crew SoftMute™). Turning down the
entertainment volume allows the pilot to place the entertainment into the background while having the radios in the foreground and eliminates the constant interruption of the music while still keeping the radios a
priority.
CAUTION
Local oscillators and internal signals from entertainment equipment can cause undesired interference with
other aircraft systems. Before takeoff, operate the entertainment devices to determine if there is any adverse
effect within the aircraft systems. If any unusual operation is noted in flight, immediately switch off the entertainment devices.
All additional entertainment devices must be switched off for both takeoff and landing.
2.5.2.1 Entertainment 2 Mute (J2 Pin 13 & 14)
Connecting J2 pin 13 to pin 14 (or ground) through a SPST switch places the entertainment #2 music source
into the Karaoke Mode. In this mode, incoming music and intercom conversation will not mute the music
for the passengers’ intercom net. This allows uninterrupted music during casual conversation and at times
when radio communications are of lesser importance.
If desired, the AUX button can act as the passengers’ mute control. Connect J2 pin 18 (AUX logic) to J2
pin 13 (Entertainment. 2 Mute inhibit). Then, Entertainment 2 will not mute when the AUX button is on.
(Not recommended if DME is input is used.)
2.5.3 Configuring Music Input with Function Keys
The music inputs can be configured by the user from the front panel (see section 3.10). There are three configurations available, independent, ICS mode dependent, and single input (music 1 to all stations).
If the inputs are independent, Input #1 (or the front jack) is provided to the pilot and copilot. Muting
(SoftMute™) is controlled by the front panel “mute” button. Music 2 is provided to the passengers at all
times, with muting controlled by an external switch (see § 2.5.2.1).
If the inputs are intercom mode dependent, input 1 goes to the pilot, copilot, and all passengers when the
intercom is in the “ALL” mode. In “ISO” mode, the copilot and passengers will hear music input 1. Music 2
PS Engineering
PMA8000BT Audio Selector Panel and Intercom System
Installation and Operator’s Manual for units with serial number CBT1561 and above
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is ONLY active in CREW mode, and then provided only to the passengers. The externally switched passenger SoftMute™ control becomes active in CREW.
If the single-source mode is activated through the function keys, the front panel jack (and music 1) is connected to all intercom positions, regardless of the intercom mode. Crew muting is controlled by the front
panel, passenger muting controlled through the switch. See section 3.11 for more details.
2.5.3.1 Annunciation and recorder playback
The pilot and copilot can hear the Function Key annunciations. If the customer wants to exclude playback
and function key annunciation playback from the copilot position, contact PS Engineering for more information.
2.5.4 Playback button Installation
Internal Recorder can be played back from the front panel. A remote momentary, normally open (NO) push
button switch may be installed if desired to remotely activate the Recording System playback. This switch
can be located anywhere in cockpit convenient to the pilot's reach. The NO switch should be connected to
pin 22 of J2 of the PMA8000BT, and ground. When installed, this button will act as in § 3.13.
2.6 Marker Beacon Installation
2.6.1 Marker Antenna Installation
A marker beacon antenna, appropriate to the type and speed of the aircraft, is required (not included). Refer
to aircraft and antenna manufacturer's installation instructions, as well as AC43.13-2B (or later revision),
Chapter 3, for information on proper antenna installation techniques. The marker beacon antenna must be
mounted on the bottom of the aircraft.
2.6.2 External Marker Lights
For installations that require external marker beacon lights, there are three outputs that can drive 12-Volt
lamps only. The external output lamps are driven high (typically +7.0 VDC 4.0 VDC unloaded, at MAX
brightness) when active. Maximum source current per lamp is 125 mA. Voltage varies with photocell dimming.
2.6.3 Middle Marker Sense
A Middle Marker Sense output signal is available from the PMA8000 to certain flight control systems. This
function will not operate during the test mode. This output will go to +4.5 VDC ( 1.0 VDC) when a valid
Middle Marker signal is received. This output is J1, pin 39.
2.7 Adjustments
The PMA8000BT is factory adjusted to accommodate the typical requirements for most aircraft configurations. There are three adjustments in the top cover that allow the installer to tailor the specific functions.
PS Engineering
PMA8000BT Audio Selector Panel and Intercom System
Installation and Operator’s Manual for units with serial number CBT1561 and above
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Figure 2-4- PMA8000BT Adjustments, top cover
Speaker Volume- Turn adjustment clockwise to increase cabin speaker output.
Marker Beacon Volume, turn adjustment counterclockwise to increase marker beacon audio level.
TEL volume, turn adjustment Clockwise to increase the incoming telephone audio.
ANN VOL Function Mode Annunciation Volume – controls the level of the to access voice an-
nunciations contained in the unit. (Top cover must be removed).
Unswitched Input 3 Volume, adjust from 50% to 200% of input value. (Bottom cover must be re-
moved).
Figure 2-5 – Unswitched 3 Audio Level (bottom cover removed)
Front
of unit
NOTE:
If top cover is removed
for ANY reason, you
MUST replace the cover
screws with the proper
length, otherwise damage
will result.
Shorter Screw
(if installed)
PS Engineering
PMA8000BT Audio Selector Panel and Intercom System
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2.8 Communications Antenna Installation Notes
For best results while in Split Mode, it is recommended that the one VHF communications antenna is located on top of the aircraft while the other communications antenna is installed on the bottom. Any antenna
relocation must be accomplished in accordance with AC 43.13-2B, aircraft manufacturers’ recommendations and FAA-approved technical data.
WARNING
It is probable that radio interference will occur in the split mode when the frequencies of the two aircraft radios are adjacent, and/or the antennas are physically close together. PS Engineering makes no
expressed or implied warranties regarding the suitability of the PMA8000BT in Split Mode.
PS Engineering
PMA8000BT Audio Selector Panel and Intercom System
Installation and Operator’s Manual for units with serial number CBT1561 and above
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2.9 PMA8000BT Pin assignments
J1
Function
J2
Function
1
Mkr Ant
1
Pilot Phones Low
2
Mkr Ant Low
2
Copilot Phones Low
3
Telephone Audio in
3
Copilot Phones (L)
4
Telephone Low
4
Copilot Phones (R)
5
Telephone Mic Audio
5
Lights Low
6
Telephone Mic Key
6
14/28 V Lights
7
ADF Audio In
7
14/28 V Lights
8
ADF Audio Low
8
Aircraft Power
9
Com 1 Audio
9
Aircraft Power
10
Com 1 Audio Low
10
Aircraft Ground
11
Com 1 Mic
11
Aircraft Ground
12
Com 1 Mic Key
12
PA Mute
13
Com 2 Audio
13
Mute Inhibit
14
Com 2 Audio Low
14
Mute Inhibit Low
15
Com 2 Mic
15
Unswitched #4
16
No Connect
16
Pilot Phones (L)
17
Nav 1 Audio
17
No connect
18
Nav 1 Audio Low
18
Misc (AUX) logic output
19
Nav 2 Audio
19
PA Enable Output
20
Nav 2 Audio Low
20
Swap
21
DME Audio
21
Swap Low
22
DME Audio Low
22
IRS Playback
23
Auxiliary Audio Input
23
Music 1 (L)
24
CNX80 Inhibit
24
Music 1 (R)
25
No connect
25
Music 1 Low
26
No connect
26
Music 2 (L)
27
Com 2 Speaker Load
27
Music 2 (R)
28
Com 2 Speaker Load
28
Music 2 Low
29
Unswitched Audio 3
29
No Connect
30
Com 2 Mic Key
30
No Connect
31
Unswitched # 1
31
Pilot Phones (R)
32
Unswitched #1 Low
32
Copilot Mic Audio
33
Pilot Mic Audio
33
Copilot Mic PTT
34
Pilot Mic PTT
34
Copilot Mic Low
35
Pilot Mic Low
35
Pass 1 Mic Audio
36
Ext IM MKR
36
Pass 1 Mic Audio Low
37
Ext OM MKR
37
Pass 2 Mic Audio
38
Ext MM MKR
38
Pass 2 Mic Audio Low
39
MM Sense
39
Pass 3 Mic Audio
40
Pass HP (L)
40
Pass 3 Mic Audio Low
41
Pass HP (R)
41
Pass 4 Mic Audio
42
Pass HP Low
42
Pass 4 Mic Audio Low
43
Unswitched #2 Low
43
Speaker Low
44
Unswitched #2 Audio
44
Speaker Output
PS Engineering
PMA8000BT Audio Selector Panel and Intercom System
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2.10 Wiring Checkout
After wiring is complete, verify power is ONLY on pins 8 and 9 of the J2 and airframe ground on connector
pins 10 and 11. Failure to do so will cause serious internal damage and void PS Engineering's warranty.
2.11 Unit Installation
To install the PMA8000BT, gently slide the unit into the mounting rack until the hold-down screw is engaged. While applying gentle pressure to the face of the unit, tighten the 3/32" hex-head in the center of the
unit until it is secure. DO NOT OVER TIGHTEN.
CAUTION
Apply steady pressure to the bezel while screwing the unit into the tray to ensure even seating of the unit
and connectors. WARNING Do not over-tighten the lock down screw while installing the unit in tray. In-
ternal damage will result.
2.12 Operational Checkout
2.12.1 Required Test Equipment
In order to return an aircraft to service after installation of the PMA8000BT, the installer must have access
to a Marker Beacon signal generator:
a. IFR NAV401L, NAV402AP, IFR4000
b. TIC T-30D, T-36C
Equivalent test equipment is acceptable as long as the testing requirements can be met.
2.12.2 Audio Panel Test
NOTE
The IntelliVox® is designed for ambient noise levels of 80 dB or above. Therefore some clipping may occur in a quiet cabin, such as without the engine running, in a hangar. This is normal.
1. Apply power to the aircraft and avionics.
2. Plug headsets into the pilot, copilot, and occupied passenger positions.
3. Verify fail-safe operation by receiving and transmitting on com 1 from the pilot position, with the audio
panel power off. The Com audio will be present in one ear cup only.
4. Switch on the unit by pressing the volume (VOL) knob.
5. Check intercom operation.
6. Push the Com 1 Xmt select button (lower row).
7. Verify that both of the Com 1 buttons light. Verify that transmit button LED (Light Emitting Diode)
near the mic selector is not blinking. If the LED is blinking, stop testing and troubleshoot the microphone PTT installation.
8. Verify proper transmit and receive operation from the copilot position, noting that the copilot PTT
switch allows proper transmission on the selected transceiver. Verify that the Com 1 Xmt button blinks
when transmitting.
9. Verify that pushing the COM 2 button causes the button to illuminate, and the Com 2 receiver to be
heard. Verify operation on Com 1 from the pilot position.
10. Repeat for Com 2
11. Press and hold the Com 1 Xmt button. While holding the Com 1 button, press the Com 2 Xmt button.
This places the unit in “split Mode;” Verify that the pilot can transmit and receive on Com 1, while the
copilot transmits and receives on Com 2.
12. Verify proper operation of all receiver sources by selecting them using the appropriate button. The button illuminates to show which source is in use.
13. Push the SPR button. Verify that all selected audio is heard in the cockpit speaker. Verify that the audio
mutes when the mic is keyed.
14. Verify that the appropriate LED in the lower button row blinks when either push to talk is keyed.
15. Verify proper Intercom system operation in the ALL, ISO and CREW modes (see Table 3-1).
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16. Verify that the audio selector panel system does not adversely affect any other aircraft system by systematically switching the unit on and off, while monitoring the other avionics and electrical equipment
on the aircraft.
2.12.3 Marker Checkout
1. Connect a ramp generator at the antenna end of the marker coax. With the unit under test in HI sensitivity, verify that a 160 V, modulated 95% with 1300 Hz, signal will illuminate the amber (M) marker
light, and that marker audio is present in the headphones when the Marker Audio (MKR) push-button
has been depressed. Select SPR for speaker to verify marker audio availability on the cabin speaker.
Verify that the white (I) and blue (O) lights will illuminate within 3dB of the amber lamp, with 3000
HZ and 400 Hz applied, respectively.
2. Repeat with the unit in LOW sensitivity, with 430 Volts applied.
3. Connect the marker antenna and verify proper operation.
2.12.4 TEL Checkout
Press the TEL button. Verify that the pilot headset is connected to the cellular telephone system (if installed). Verify that by using the pilot side PTT, the pilot can transmit on the other selected radio (Com 1 or
Com 2). The telephone function will allow any person heard by the pilot on the intercom, also heard on the
telephone.
2.12.4.1Bluetooth Checkout (050-890-1702)
Verify that the PMA8000BT will “pair” with a Bluetooth device, and interface with cellular phone and Music source. See section 3.12 for more information.
2.12.5 Internal Recorder Checkout
With headset plugged into pilot’s side jacks, tune COM 1 to local frequency, such as FSS or ATC ground.
Select Com 1 on mic selector switch, and record several incoming radio transmissions.
Press the Com receiver pushbutton that corresponds to the selected radio transmitter and hold for approximately one second. This action will then automatically play back the last recorded message. Press and
HOLD the button again to stop the play back, and then momentarily press again to play prior messages.
This audio should appear in the pilot and copilot headsets, and only be incoming transmissions from the
transceiver selected in the mic select switch. Depress the audio panel or yoke mounted playback switch,
and verify that messages play, in the order received. Repeat for COM 2. The playback will be stopped by
audio on the selected com. The message can be replayed from the beginning, and audio received during the
playback will not be stored.
2.12.6 Function Button Checkout
While listening to the pilot’s headset, press and hold the TEL, AUX, MUTE and SPR buttons, verifying
that the annunciations play back in pilot headset. See operation section for information. Incoming audio on
selected com will stop the audio.
Button
Announcement 1
Announcement 2
Announcement 3
TEL
Alternate Intercom Function
Standard Intercom Function
AUX
Monitor On
Monitor Off
MUTE
Music one all headsets
Alternate Music Distribution
Standard Music Distribution
SPR
Chime; music increases
Chime, music decreases
2.13 Final Inspection
Verify that the wiring is bundled away from all controls and no part of the installation interferes with aircraft control operation. Move all controls through their full range while examining the installation to see
that no mechanical interference exists. Verify that the cables are secured to the aircraft structure in accordance with good practices, with adequate strain relief. Ensure that there are no kinks or sharp bends in the
cables and coaxial cables. Verify that the cables are not exposed to any sharp edges or rough surfaces, and
that all contact points are protected from abrasion.
PS Engineering
PMA8000BT Audio Selector Panel and Intercom System
Installation and Operator’s Manual for units with serial number CBT1561 and above
200-890-1702 Page 2-15 New, April 2011
Complete documentation that may be required, such as a logbook entry, weight and ba lance computation and FAA Form
337. Sample text for FAA Form 337, and instructions for continuing airworth iness can be found in Appendix F. Return
completed warranty registration application to PS Engi neering, or co mplete online at www.ps -engineering.com.
PS Engineering
PMA8000BT Audio Selector Panel and Intercom System
Installation and Operator’s Manual
200-890-1702 Page 3-1 New, April 2011
Section III OPERATION
3.1 SCOPE
This section provides detailed operating instructions for the PS Engineering PMA8000BT, Audio Selector
Panel/Marker Beacon Receiver/Intercom Systems. Please read it carefully before using the equipment so
that you can take full advantage of its capabilities.
This section is divided into sections covering the basic operating areas of the PMA8000BT systems. They
are Communications Transceiver Selection, Audio Selector, Intercom, Marker Beacon Receiver and special
functions, including the Bluetooth® functionality in the PMA8000BT.
Figure 3-1 PMA8000BT Operating Controls
Unit power is turned on and off by pushing the volume knob. In the OFF or "EMG" position, the pilot headset is connected directly to Com 1 as well as unswitched input #1. This allows communication capability
regardless of unit condition. Any time power is removed or turned OFF, the audio selector will revert to failsafe mode.
The power switch controls all audio selector panel functions, intercom and marker beacon receiver. All
pushbutton selections will be remembered and return to the last state when turned on.
3.2 Communications Transmit (XMT) Selection (2)
There are two pushbuttons associated with the transmitter selection. The two lower buttons (# 2) control
which transceiver is selected for transmit. The top row of pushbuttons (# 3) allows selection of the receiver
audio. Push the lower button to select the desired COM transmitter.
The PMA8000BT has an automatic selector system. Audio from the selected transceiver is automatically
heard in the headsets and speaker (if selected). You can check this function by switching from COM 1
transmitter to Com 2 transmitter by pressing the COM 2 transmitter selector pushbutton. See that the associated Com 2 receive pushbutton indicator light that is located immediately above the Com 2 transmitter
pushbutton turns green. This guarantees that the pilot will always hear the audio from the transceiver selected for transmit.
The PMA8000BT “remembers” the receiver selection, so that when switching transmitters from COM 1 to
COM 2, if COM 2 audio was previously selected, COM 1 audio will continue to be heard. This eliminates the
pilot having to switch Com 1 audio back on, after changing transmitters. When switching from COM 1 to
COM 2 while Com 2 was not previously selected, COM 1 audio will be switched off. In essence, switching
the mic selector will not override prior selection of COM receiver audio.
In normal (not split) modes, the PMA8000BT gives priority to the pilot’s radio Push-To-Talk (PTT). If the
PS Engineering
PMA8000BT Audio Selector Panel and Intercom System
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200-890-1702 Page 3-2 New, April 2011
copilot it transmitting, and the pilot presses his PTT, the pilot’s microphone will be heard over the selected
com transmitter.
In TEL mode, the pilot microphone and headphones are connected to the cell phone. The pilot PTT will
switch the pilot mic to the selected com transceiver, and allow continued aircraft communications to continue. (See Section 3.4 —TEL—for more details)
The copilot will also be able to transmit on the other selected radio with his PTT as well.
3.2.1.1 Split Mode
The split mode can be activated at any time by pressing the COM 1 and COM 2 XMT buttons at the same
time. This places the pilot on COM 1 and the Copilot on COM 2.
Pilot on COM 2 and Copilot on COM 1 is not possible.
NOTE
Due to the nature of VHF communications signals, and the size constraints in general aviation aircraft, it is
probable that there will be some bleed-over in the Split mode, particularly on adjacent frequencies. PS
Engineering makes no warranty about the suitability of Split Mode in all aircraft conditions.
When the split mode is activated, the intercom between the pilot and copilot is inhibited, although the passengers can still talk among themselves. The crew intercom can be reactivated if desired by pressing the
“Mute” button. The indicator LED in the Mute button will be green when the intercom is off (muted), and
turn off to indicate that the intercom is not muted, and the crew can speak to each other.
3.2.1.2 Swap Mode (Switch from Com 1 to Com 2 remotely)
With a yoke mounted, normally open momentary switch, the pilot can change from the current Com transceiver to the other by depressing this switch. To cancel "Swap Mode," the pilot may either press the yoke
mounted switch again, or select a different Com with the XMT buttons.
3.2.1.3 Monitor Mode
The PMA8000BT is equipped with a Monitor function, which allows a secondary com radio audio to be
muted by the primary radio (selected for transmit). See §3.11.2 for more information.
3.3 Audio Selector (4)
Communication audio from the other radio, not selected for transmit, can be heard by pressing the associated RCV button. You will always hear the audio from the selected transceiver.
Navigation receiver audio is selected through five momentary, push-button, backlit switches.
The users can identify which receivers are selected by noting which green switch LEDs are lit. Navigation
aid audio push buttons are labeled Nav 1, Nav 2, MKR (Marker), ADF and AUX (auxiliary). DME audio
(if present) will come through when the AUX button is selected. When one of these buttons is pressed, the
mode is active, and the LED will illuminate. Press the switch again and it will be "off" and remove that receiver from the audio output.
In SPLIT mode, only the pilot will hear selected navigation audio.
3.4 Telephone (TEL) (9)
The TEL mode serves as a full duplex interface and distribution for telephone systems such as AirCell or
portable cellular phones with earpiece jacks. Pressing the TEL button activates the telephone mode.
This connects the telephone to the users as follows:
In ALL intercom mode, all crew and passengers will be heard on the phone when they speak. Com and oth-
er selected radio audio is also heard in the headsets. If the pilot or copilot pushes the radio PTT, their mic
will be transferred to the selected Com radio. The telephone party will not hear ATC communications, and
vice versa.
In CREW mode, only the pilot and copilot are connected to the telephone. Passengers will not hear the
telephone. The pilot and copilot will also have transmit capability on the other selected transceiver.
In ISO intercom mode, when the PMA8000BT is in the TEL mode, the pilot position is in the "Phone
PS Engineering
PMA8000BT Audio Selector Panel and Intercom System
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Booth." Only the pilot will hear the telephone, and only he will be heard. He will also have access to Com 1
or 2, and will transmit on that radio using the PTT. All selected audio is provided to the pilot.
NOTE
Because the cell-phone uses an intercom circuit, all stations on that circuit will lose intercom capability
when the cell phone is in use.
3.4.1 Cell phone Sidetone
As shipped from PS Engineering, the PMA8000BT does NOT provide cellular telephone sidetone (the user’s voice fed back to the headset). Some cell phones do not provide sidetone. In PMA8000BT audio panels, Telephone sidetone can be enabled by pressing the TEL and ADF buttons for more than one second.
3.5 Speaker Amplifier (5)
The SPR in the lower right section stands for speaker. This switch will place all selected audio on the cockpit speaker when this switch is selected. Except for the unswitched audio, the speaker amplifier is not active
in the "Split Mode”.
Unswitched audio, (the inputs dedicated to autopilot disconnect, altimeter warning, etc.) will come through
the speaker regardless of the speaker button position.
Depending on installation, important audio annunciations such as radar altimeter or autopilot disconnect
will come over the speaker even if it is not selected, while other unswitched, but muted inputs, such as GPS
alerts, will only be present if the SPR button is selected. Consult your professional avionics installer for
these important configuration details.
3.5.1.1 Public Address Function
To access PA function, press the Mute and SPR buttons simultaneously. The
pilot microphone will be heard on the speaker when the pilot PTT is used. The
copilot can continue to use the selected com radio while the pilot will now be
heard over the speaker. During Public Address, the Mute and SPR buttons will
flash. To exit PA mode, push Mute and SPR again.
3.6 Marker Beacon Operation (10)
The Marker Beacon Receiver uses visual and audio indicators to alert you when the aircraft passes over a
75 MHz transmitter.
The Blue lamp, labeled “O”, is the Outer Marker lamp and has an associated 400-Hertz 'dash' tone. The
lamp and tone will be keyed at a rate of two tones/flashes per second when the aircraft is in the range of the
Outer Marker Beacon.
The Amber lamp, labeled “M”, is the Middle Marker lamp and is coupled with a 1300 Hertz tone. It is
keyed alternately with short 'dot' and long 'dash' bursts at 95 combinations per minute.
The White lamp, labeled “I”, is the Inner marker and has a 3000 Hertz 'dot' tone. The lamp and tone will be
keyed at a rate of six times per second.
The audio from the Marker Beacon Receiver can be heard by selecting the "MKR" push-button switch. To
adjust the volume level, there is a service adjustment located on the top of the unit.
A pushbutton is used to set the receiver sensitivity and to test the indicator lamps mute the marker audio.
Use "HI" sensitivity initially. This allows you to hear the outer marker beacon about a mile out. Then touch
the smaller MKR button to switch into Low Sensitivity mode. “LO” sensitivity gives you a more accurate
location of the Outer Marker. Holding the MKR button for one second activates marker test lamp, labeled
"T/M" and illuminates all three lamps simultaneously to assure the lamps (internal and external) are in
working order. TST does not activate MM autopilot sense output. Releasing the button returns to the last
sensitivity.
Pressing the marker mode select (“T/M”) for one second will also cause the marker audio to mute for that
beacon. The next beacon received will re-activate the audio.
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3.7 Intercom Operation
3.7.1 IntelliVox® VOX-Squelch
No adjustment of the IntelliVox® squelch control is necessary. There is no field adjustment. Through three
individual signal processors, the ambient noise appearing in all six microphones is constantly being sampled. Non-voice signals are blocked. When someone speaks, only their microphone circuit opens, placing
their voice on the intercom.
The system is designed to block continuous tones; therefore people humming or whistling in monotone may
be blocked after a few moments.
For consistent performance, any headset microphone must be placed within ¼-inch of your lips, preferably
against them. (ref: RTCA/DO-214, 1.3.1.1 (a)).
NOTE
It is also a good idea to keep the microphone out of a direct wind path. Moving your head through a vent air
stream may cause the IntelliVox® to open momentarily. This is normal.
The IntelliVox® is designed to work with normal aircraft cabin noise levels (70 dB and above). It loves
airplane noise! Therefore, it may not recognize speech and clip syllables in a quiet cabin, such as in the
hangar, or without the engine running. This is normal.
For optimum microphone performance, PS Engineering recommends installation of a Microphone Muff Kit
from Oregon Aero (1-800-888-6910). This will not only optimize VOX performance, but will improve the
overall clarity of all your communications.
Manufacturer
Model
Mic Muff™ Part Number
Bose
Dynamic
Electret
M87 Dynamic
90010
90015
90020
David Clark
H10-30
H10-20, H10-40
H10-13.4
90010
90015
90015
Lightspeed
All
90015
Peltor
7003
7004
90010
90015
Pilot
11-20 & 11-90
90015
Sennheiser
90015
Telex
Airman 750, Echelon
AIR3000
90015
90010
Table 3-1 Mic Muff ™ Part Numbers
3.7.2 Intercom Volume Control (7)
The inner volume control knob adjusts the loudness of the intercom for the pilot and copilot. It has no effect
on selected radio levels, music input levels or passengers' volume level.
The outer volume control knob controls intercom volume for the passengers. It has no effect on radio or
music levels.
Adjust the radios and intercom volume for a comfortable listening level. Most general aviation headsets
today have built-in volume controls; therefore, volume also can be further adjusted at the individual headset.
3.7.2.1 Mono headsets in Stereo Installation
The pilot and copilot positions work with stereo or mono headsets. All passenger headsets are connected in
parallel. Therefore, if a monaural headset is plugged in to a PMA8000BT Stereo installation, one channel
will be shorted. Although no damage to the unit will occur, all passengers with stereo headsets will not hear
one channel, unless they switch to the “MONO” mode on their headset.
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3.7.3 Intercom Modes (8)
The “ICS” pushbutton switch on the left side of the panel provides the selection of the three intercom
modes. The description of the intercom mode function is valid only when the unit is not in the "Split" mode.
Then, the pilot and copilot intercom is controlled with the Mute button.
This button cycles through the intercom modes, from top to bottom, then bottom to top as: ISO, ALL Crew
and Crew, ALL, ISO. An LED shows which mode is currently active.
ISO: The pilot is isolated from the intercom and is connected only to the aircraft radio system. He will hear
the aircraft radio reception (and sidetone during radio transmissions). Copilot will hear passengers’ inte rcom and entertainment, while passengers will hear copilot intercom and entertainment. Neither will hear
aircraft radio receptions or pilot transmissions. The pilot can hear music if desired. See §3.8.1
ALL: All parties will hear the aircraft radio and intercom. Crew and passengers will hear selected entertainment. During any radio or intercom communications, the music volume automatically decreases. The
music volume increases gradually back to the original level after communications have been completed.
CREW: Pilot and copilot are connected on one intercom channel and have exclusive access to the aircraft
radios. They may also listen to Entertainment 1. Passengers can continue to communicate with themselves
without interrupting the Crew and may listen to entertainment as configured.
3.8 Music and Music Muting (6)
The PMA8000BT has two independent music inputs at the rear connector, and a front panel jack. The
PMA8000BT also has the ability to receive streaming music from a Bluetooth-enabled device.
Music 1 will be heard by the pilot and copilot positions. Music 1 can also be distributed to the passengers
using the Function “C” control (See § 3.11.3). The front panel jack input is treated as Music 1, and the
streamed music in the PMA8000BT is also Music 1.
NOTE:
All music devices should be turned off for take off, landing, or any critical phase of flight. FAA Regulation
14 CFR 91.21 restricts the use of portable electronic devices.
§91.21 “(a) Except as provided in paragraph (b) of this section, no person may operate, nor may any operator or pilot in command of an aircraft allow the operation of, any portable electronic device on any of the
following U.S.-registered civil aircraft. . .
“(b)(5) Any other portable electronic device that the operator of the aircraft has determined will not cause
interference with the navigation or communication system of the aircraft on which it is to be used.”
You can refer to Advisory Circular 91.21-1A for more information, at http://www.faa.gov
The front panel "Mute" button has four modes, and controls the Mute function for Music 1.
The SoftMute™ circuit will mute the music whenever there is conversation on the radio, the intercom, or
both, depending on the “Mute” mode selected. When that conversation stops, the music returns to the previ-
ous level comfortably, over a second or so.
The mute mode functions are controlled through sequential pushes of the Mute button, and include annunci-
ations of the mode selected. The PMA8000BT always defaults to Mute On when turned on.
Mute- music will mute with either intercom or radio - MUTE button is lit. Voice annunciation is "mute on."
Mute Off - “Karaoke” mode - music will not mute except during transmissions.- MUTE LED is OFF. An-
nunciation is "mute off."
Radio Mute - Radio will mute music, but intercom will not mute music - MUTE LED is OFF. Annunciation
is "radio mute."
Mode 4 - Radio will not mute music, intercom will mute music - MUTE LED is OFF. Annunciation is "in-
tercom mute."
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PMA8000BT Audio Selector Panel and Intercom System
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♫ Music
Intercom
Radio
Annunciation
LED
Mute
Muted
Muted
“Mute on”
on
Mute Off
♫♫“Mute off”
off
Radio
♫
Muted
“Radio mute”
off
Intercom
Muted
♫
“Intercom mute”
off
The passenger’s intercom also has a SoftMute™ circuit. If the passengers hear the radio, or talk on the intercom, the music will mute. If the audio panel is in CREW mode, then the radio reception will not affect
the passenger music.
Passengers also have a Karaoke Mode. If the passengers are listening to the music 1 input or front panel
input, their Karaoke Mode is controlled by the front panel “Mute” button. If the passengers are listening to
the music 2 input, their Karaoke Mode is activated by an external switch installed either in the panel, or
connected to the AUX button logic output pin on the PMA8000BT.
3.8.1 Music in Pilot ISO mode
If desired, the pilot can elect to hear Music #1, in the ISO mode. While the intercom is in ISO mode, push
and hold the ICS button until the ICS indicator blinks (about 1 second). This mode will be indicated by the
ICS ISO LED blinking slowly (once in every 5 seconds). The pilot will now hear Music #1, and it will mute
in accordance with the Mute mode as described in §3.8.
3.9 Telephone Mode (9)
Warning:
United States FCC Regulations contained in 47 CFR § 22.925 contain 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.”
The TEL mode serves as a full duplex interface for telephone systems such as portable cellular phones with
earpiece jacks (or Bluetooth connectivity (PMA8000BT only). When interfaced with an approved airborne
telecommunications system, the PMA8000BT can serve as a audio control and distribution center. When
TEL is active, the button will blink about twice as fast as the normal transmit rate.
In ALL intercom mode, all crew and passengers will be heard on the phone when they speak. All will hear
selected audio. Com audio is automatically heard in the headsets.
In CREW mode, the pilot and copilot are connected to the telephone. The pilot and copilot will have
transmit capability on the other selected transceiver Com 1 or 2, simply by using their respective PTT
switch.
In ISO intercom mode, when the PMA8000BT is in the TEL mode, the pilot position is in the "Phone
Booth." Only the pilot will hear the telephone, and only he will be heard. He will also have access to Com 1
or 2, and will transmit on that radio using the PTT. All selected audio is provided.
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PMA8000BT Audio Selector Panel and Intercom System
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200-890-1702 Page 3-7 New, April 2011
Crew
NOTE
Because the cell phone uses an intercom circuit, all stations on that circuit will lose intercom capability
when the cell phone is in use. Intercom conversations will still be present if the cell phone provides
sidetone, or if the audio panel is modified for telephone sidetone.
PS Engineering does not guarantee compatibility with personal cellular telephones.
Visit www.ps-engineering.com for a list of phones that have been tested.
3.9.1 Cellular telephone sidetone
As shipped from PS Engineering, the PMA8000BT does NOT provide cellular telephone sidetone (the user’s voice fed back to the headset). Some cell phones do not provide sidetone. In PMA8000BT Telephone
sidetone can be enabled by pressing the TEL and ADF buttons for more than one second.
3.10 Utility Jack
The 2.5-millimeter (3/32”) jack on the front of the PMA8000BT has three distinct functions:
Cell phone input
Advisory audio input
Music input
The use of this jack is controlled by three Smart Function Keys (SFK) controlled from the front panel. See
Section 3.11 — Smart Function Keys.
3.10.1 Cellular phone
When a cellular telephone is connected to this jack using a 2.5 mm
to 2.5 mm adapter cord (PS Part Number 425-006-7026), the
PMA8000BT audio panel will connect the intercom to the cell
phone when the “TEL button is pressed (9), and behave as described
in section 3.7. The telephone ringer, if present, will be heard unless the input is muted by other radio or
intercom.
3.10.2 Audio Advisory Input
The front jack can be used as a priority advisory input for auxiliary systems such as a GPS terrain advisory
or portable traffic watch system. To prevent radio or intercom from muting this input, press the “Mute”
button.
3.10.2.1 Smart Jack Function
When the PMA8000BT has a signal on music #1
input coming in from the rear connector, the front
panel jack automatically becomes a Priority Advisory input, and is heard in the crew headphones.
NOTE
The front jack is no substitute for the certified installation of alerts such as the GPS waypoint or autopilot
tones. These still must be hard wired into the back by your installer. The front jack input will be muted by
radio or intercom unless music is actively playing in the rear connector. Consequently, it is possible that an
alert may be missed unless the mute mode is deselected.
3.10.3 Music Input
When used as a music input, the front panel jack is treated as Music #1. However, thanks to the function
controls, it can be distributed to all users, depending on the intercom mode. A patch cord is available with
2.5 mm to 3.5 mm (3/32 to 1/8”) adapter cord (PS Part Number 425-006-2535).
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3.11 Smart Function Keys (SFK)
With Virtual Tech Support, the configuration process is self-directed. SFK annunciations are heard by the
pilot and copilot positions only. SFK annunciations will be heard by the copilot, even when the audio panel
is in pilot isolate mode. These annunciations will be stopped by any audio received on the com radio selected for transmit.
Intercom
TEL
Monitor
AUX
Music
Mute
Alternate Intercom
mode
Monitor Mode
Music Distribution
State 1
State 2
State 1
State 2
State 1
State 2
State 3
“Alternate
intercom
function”
“Standard
Intercom
Function”
“Monitor
on”
“Monitor
off.”
“Standard
music
distribution”
“Alternate
music
distribution”
“Music 1 all
headsets”
Table 3-2 – Smart Function Key Functions
Figure 3-2 Smart Function Keys
These functions are non-essential and non-required and as such are only an accessory capability. They don’t
affect the audio panel’s primary function as a selector panel, aircraft intercom, or marker beacon receiver.
You can’t do anything with these buttons to prevent the PMA8000BT from doing its main job.
Looking at the front panel you’ll notice that the TEL, AUX, Mute and SPR buttons have secondary function
assignments listed underneath the button.
To use these function keys– press and hold the desired key, “Intercom” (TEL) “Monitor” (AUX) or “Mu-
sic” (MUTE) until the audio annunciation is heard, indicating the mode has changed. The SPR controls the
music 1 volume, and is discussed later.
There are multiple music sources available to the PMA8000BT. Music 1 input can be streamed from a
Bluetooth source, input through the front jack, OR the Music 1 input at the rear connector (Pins 23 and 24
J2). Music 2 is wired into the rear connector, only (Pins 26 and 27, J2)
3.11.1 “Intercom” Alternate Intercom Function (A)
This function controls the distribution of aircraft radio within the intercom, as well as passenger intercom
muting, when in the “ALL” intercom mode. In the “standard intercom function” mode, aircraft radios are
distributed to all, when the intercom is in the ALL mode. In CREW mode, only the pilot and copilot
positions will hear aircraft radios.
When “Intercom” function is toggled (hold TEL button) into “Alternate Intercom Function,” the passengers
will NOT hear aircraft radios, even in the All intercom mode. They will be able to converse with the crew.
However, when the aircraft radio becomes active, the intercom audio from the passengers is muted,
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PMA8000BT Audio Selector Panel and Intercom System
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allowing the crew to focus on the radio. The passengers will still be able to talk to each other. Pressing
TEL button again switches the intercom back to “Standard Intercom Function.”
Alternate Intercom mode is announced at power up, unless the power on announcement has been defeated.
3.11.2 Monitor (B)
Pressing Monitor (AUX) will activate or deactivate the COM radio monitor function. When the Monitor is
on, the audio from the COM that is selected for reception only (only top LED illuminated) will be muted
when the radio that is selected to transmit becomes active.
This function is useful if you are copying weather from AWOS on COM 2, but have clearance delivery
tuned in on COM 1. With the monitor active, the AWOS audio will be silenced when clearance delivery
starts to speak.
To activate the Monitor function press and hold AUX, until audio announces “Monitor on,” and the same
button again to deactivate. The unit announces“Monitor off” when deactivated.
NOTE: This mode is NOT remembered through power cycles, to prevent inadvertent blocking of desired
audio on your next trip.
3.11.3 Music (C)
The Music function button (C) allows you either send the music 1 input to all intercom stations, all of the
time, or have other distribution rules apply to your music inputs.
When “Music one all headsets” is selected (press and hold Mute), music 1 (from the rear connector input,
Pins J2 23 & 24 only) will be distributed to all headsets and is independent of the intercom mode switch.
Therefore, even in the CREW mode, the passengers will hear Music 1, even though they will not hear the
intercom or radios.
This mode allows you to use a single in-flight entertainment source aboard, and to send it everywhere, even
in crew mode. The music muting will be normal, and follow the selected mode of the crew or passengers.
Music function also allows you to configure your music to be either independent of the intercom mode, or
to make Music 2 dependent on the intercom mode.
When you press and hold Music (Mute) again, you’ll hear, “Alternate Music distribution.” In this case,
Music 2 will be active only when the intercom is in the CREW mode, and only the passengers will hear it.
This distribution is similar to other brands of audio panels. It allows the passengers to have their music
source come on only when they are not hearing the crew. In addition, the front panel jack input will be distributed to the passengers in ALL and ISO mode.
Press and hold Music (Mute) again, and you will hear “Standard Music Distribution.” In this mode, Music
2 becomes active, and will always be presented to the passengers on the intercom. Music 1 is only available
to the pilot and copilot. The intercom mode switch doesn’t have any affect on the music distribution.
When the music is standard, Music 1 will always go to the pilot and copilot positions, and is never heard by
the passengers. Music 2 is always heard by the passengers, and never heard by the pilot and copilot.
This mode is useful if your passengers have a different interest in entertainment or are watching a DVD, but
do not want to be excluded from the intercom conversations.
The pilot and copilot will always hear Music 1 through the unit rear connector, or a source plugged into the
front panel jack. This is present in ALL and CREW intercom modes, and available to the copilot position in
ISO mode.
The pilot can hear this music source in ISO mode, if desired, as follows: In the ISO mode, hold the (Music)
button, and press the ICS mode button for more than one second. The ICS mode LED will blink slowly to
indicate music is connected to the pilot headset, although the intercom is not.
Music 2 is provided to the passenger positions regardless of intercom mode, when the audio panel is in
Standard Music Distribution, and also in Alternate Music Distribution, but only if the intercom is in the
CREW mode. The pilot and copilot can never hear Music 2, under any condition.
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If the passengers always want to hear the source in Music 1, input through the rear connector, regardless of
the intercom mode (ISO/ALL/CRW), select “Music 1 all headsets.”
If the passengers want to hear the music input through the front panel jack, the audio pane MUST be in Alternate Music Distribution, and the intercom must be in the ALL or ISO mode.
Music Distribution Mode
Standard Music
Distribution
Alternate Music
Distribution
Music 1
All Headsets
Music
Source
ICS Mode
All
Crew
ISO
All
Crew
ISO
All
Crew
ISO
Front Panel
Jack
Crew
Crew
Copilot*
Crew
&
Pass
Crew
Copilot*
& Pass
Crew
Crew
Copilot*
Music 1 Input
Crew
Crew
Copilot*
Crew
&
Pass.
Crew
Copilot*
& Pass.
Crew
&
Pass.
Crew
&
Pass.
Copilot*&
Pass.
Music 2 Input
Pass.
Pass.
Pass.
Pass.
*Pilot has Music 1 option in ISO mode
Table 3-3 Music Distribution
Alternate Music distribution modes are announced at power up, unless the power on announcement has
been defeated by holding the TEL and AUX buttons at the same time for more than two seconds. In that
case, the annunciations will not be played at unit power up.
3.11.4 Music 1 Volume
In general, we recommend adjusting the entertainment volume at the source, and only using this as a master
gain control. However, the Music 1 PMA8000BT input can be adjusted from the front panel, if desired, by
pressing the combinations of keys listed.
The Music 1 volume can be adjusted from the front panel, if desired, by pressing and holding the Music
Volume (SPR) key.
Press the Music Volume (SPR) for more than one second, a beep tone will be heard, and the music volume
will begin to increase. To decrease the volume, release the Music Volume (SPR) button, and press and
hold again, the beep tone will occur and the volume will decrease. Continue to hold until the desired level is
reached.
Note: Since it is possible to turn the volume completely off, you may need to turn the volume up if you
don’t hear music when you expect to.
It will take about 10 seconds to go from minimum to maximum volume.
3.11.5 Power on announcement
If the Intercom or Music Distribution is changed from the factory default, the configuration will be played
when the unit is powered up. To defeat this announcement, hold the TEL and AUX buttons when for more
than two seconds. The feature can be enabled again using the same sequence.
3.12 Bluetooth® interface
The PMA8000BT has a Bluetooth interface. The audio panel is always “discoverable,” so you just need to
search for the PMA8000BT from your Bluetooth-equipped phone or music source. The default access code
PS Engineering
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is 0000, if needed. Once the PMA8000BT has been “paired” with your Bluetooth device, the TEL distribution will act as described in § 3.4.
You can answer a call by pushing the TEL button while it is ringing. Calls can be answered from the telephone handset or the audio panel. You can disconnect from either the handset or the audio panel. When a
call is disconnected or dropped, the TEL button indicator will extinguish after a few moments.
3.12.1 Pairing and unpairing Bluetooth devices
The PMA8000BT can be paired with up to eight individual devices. When that number is exceeded, one
device will be automatically un-paired to allow the new device. The device eliminate will be selected at
random by the Bluetooth module. Hint, if your old phone is not recognized by the PMA8000BT, you may
simply need to re-pair.
3.12.1.1Bluetooth Reset
If the Bluetooth stops responding to paired devices, it may be because of corrupted device data. Simply
reset the Bluetooth system as follows:
1. Power off audio panel
2. Put the pilot’s headset on
3. Hold down NAV2 and MKR switches at the same time
4. Turn ON the audio panel, and continue to hold down the two switches for about least 5 seconds or
there is a "ding" sound in headset, if you do not hear this chime start over.
5. Audio panel is re-initiation complete
6. Remove PMA8000BT device from your smart phone
7. Search for Bluetooth devices from your smart phone
8. Select PMA8000BT
9. If password is required try 0000 or 1234
10. Once paired stream music and place phone call
3.12.1.2Paring separate music and telephone devices
It is possible to use a different music source (iPad, iPod with Bluetooth adapter, Bluetooth enabled laptop,
etc.) and telephone. However, the music source must be paired first, before the telephone, if the telephone
also has music streaming capability. Otherwise, the Smartphone will also take over the music streaming.
3.12.1.3Changing access codes
If desired, you can change the 4-digit code needed to pair your device. Hold the button shown in the following table, and turn the PMA8000BT on. You will hear a tone indicating that the code was changed.
Hold button on power up
Pairing Code
Nav 1
0000 (default)
Nav 2
1234
MKR
1111
Table 3-4 Bluetooth PIN codes
3.12.2 Last Number Redial
The audio panel will redial the last number dialed from the paired telephone. When there is no call in progress, press the TEL button and then press and hold the MKR button for 1 second, or until the telephone
connects and redials.
3.12.3 Speed Dial
NOTE: this feature ONLY works if the paired cell phone has Speed Dial numbers stored. To access the
speed dial keys stored in your telephone, when there is no call in progress, press the TEL button and then
PS Engineering
PMA8000BT Audio Selector Panel and Intercom System
Installation and Operator’s Manual
200-890-1702 Page 3-12 New, April 2011
press and hold the Nav 1 button (Speed dial #1) or the Nav 2 button (speed dial #2) for one second, or until
the phone activates,
3.12.4 Bluetooth music control
The PMA8000BT can control some Bluetooth music devices. When the music is playing, press and hold the
“Function” button (TEL), and push the desired music function button.
Play/Pause (TEL and Nav 1)
Skip Backward (TEL and Nav 2)
Skip forward (TEL and MKR)
NOTE: Due to the variety of Bluetooth devices and capabilities, PS Engineering does not guarantee that the
PMA8000BT Bluetooth interface will work the same way in all devices.
Visit ps-engineering.com/support for more information on tested models.
3.13 Internal Recorder and playback
The PMA8000BT comes equipped with an internal recorder. This digital system stores the last incoming
audio from the radio you have selected for transmit. It can store as many of 8 incoming messages, and up to
45 seconds of audio. The pilot and copilot hear the playback. It is also possible to modify the unit to exclude the copilot from the playback, and annunciation playback. Contact PS Engineering, for more details.
Recording is automatic. To play back the last recorded message, press and hold the COM Receive pushbutton associated with the selected radio transmitter for about one (1) second. You can either wait for the message to finish playing before accessing the prior message, or cancel the current playback and step backward.
To cancel the playback, press and hold the COM receive playback button for two seconds (2). The next
time the button is pressed for one (1) second, the next earlier message will be heard. The playback will
stop whenever there is more incoming selected com audio, and the message can be replayed from
the beginning by pressing the selected Com Receive button again for 1 second.
Figure 3-3 Playback Controls
PS Engineering
PMA8000BT Audio Selector Panel and Intercom System
Installation and Operator’s Manual
200-890-1702 Page 3-13 New, April 2011
PS Engineering
PMA8000BT Audio Selector Panel and Intercom System
Installation and Operator’s Manual
200-890-1702 Page 4-1 New, April 2011
Section IV – Warranty and Service
4.1 Warranty
In order for the factory warranty to be valid, the installations in a certified aircraft must be accomplished by
an FAA-(or other ICAO agency) certified avionics shop and authorized PS Engineering dealer. If the unit is
being installed by a non-certified individual in an experimental aircraft, a factory-made intercom harness
must be used for the warranty to be valid.
PS Engineering, Inc. warrants this product to be free from defect in material and workmanship for a period
of three (3) years from the date of sale. During the first twelve (12) months of the three-year warranty period, PS Engineering, Inc., at its option, will send a replacement unit at our expense if the unit should be determined to be defective after consultation with a factory technician. For the remaining twenty-four (24)
months of the three-year warranty period, PS Engineering, Inc., at its option, will send a similar replacement unit at the customers expense if the unit should be determined to be defective after consultation with
an authorized PS Engineering dealer.
All transportation charges for returning the defective units are the responsibility of the purchaser. All domestic transportation charges for returning the exchange or repaired unit to the purchaser will be borne by
PS Engineering, Inc. The risk of loss or damage to the product is borne by the party making the shipment,
unless the purchaser requests a specific method of shipment. In this case, the purchaser assumes the risk of
loss.
This warranty is not transferable. Any implied warranties expire at the expiration date of this warranty. PS
Engineering SHALL NOT BE LIABLE FOR INCIDENTAL OR CONSEQUENTIAL DAMAGES. This
warranty does not cover a defect that has resulted from improper handling, storage or preservation, or unreasonable use or maintenance as determined by us. This warranty is void if there is any attempt to dissemble this product without factory authorization. This warranty gives you specific legal rights, and you may
also have other rights, which may vary from state to state. Some states do not allow the exclusion of limitation of incidental or consequential damages, so the above limitation or exclusions may not apply to you.
All items repaired or replaced under this warranty are warranted for the remainder of the original warranty
period. PS Engineering, Inc. reserves the rights to make modifications or improvements to the product
without obligation to perform like modifications or improvements to previously manufactured products.
4.2 Factory Service
The units are covered by a three-year limited warranty. See warranty information. Call PS Engineering, Inc.
at (865) 988-9800 before you return any unit. This will allow the service technician to provide any other
suggestions for identifying the problem and recommend possible solutions.
After discussing the problem with the technician and you obtain a Return Authorization Number, ship product to:
PS Engineering, Inc.
Attn: Service Department
9800 Martel Rd
Lenoir City, TN 37772
(865) 988-9800 FAX (865) 988-6619
Email: support@ps-engineering.com
Units that arrive without an RMA number, or telephone number for a responsible contact, will be
returned un-repaired. PS Engineering is not responsible for items sent via US Mail.
PS Engineering
PMA8000BT Audio Selector Panel and Intercom System
Installation and Operator’s Manual
200-890-1702 Appendix A New, April 2011
Appendix A – External PTT Hook Up
Part of the installation includes the installation of PTT (Push To Talk) switches that allow the use of your
aircraft radio for communications transmissions.
There are three possible configurations; you must select the case that best fits your installation.
NOTE: Only the person who presses their PTT switch will be heard over the radio.
CASE I
The PTT is built into the pilot and copilot yokes
Simply install the plugs from the headset into the aircraft headphone jacks. Then use the yoke mounted PTT
to transmit. No other action is required.
CASE II
Built in PTT only on the pilot side only
This configuration requires a modified external PTT switch plugged into the copilot's mic jack. (See Details
Below) When the copilot's PTT is depressed, this activates an internal relay that switches the mic audio to
the aircraft radio from the pilot to the copilot.
Case III
No built in PTT switch at all.
Two built-in PTT must be installed, or two external, modified PTT switches will be required for both the
pilot and copilot. Modifications to the PTT are required. (See details below)
Push To Talk Modifications
When received from the manufacturer, an after-market PTT switch opens the mic audio path to the "ring"
connection of the PTT mic plug until the button is pressed. When the PTT is between the intercom and the
headset, the intercom function will not work unless the PTT switch is depressed. A simple modification can
be performed to allow proper intercom operation. NOTE: This mod does not alter normal operation.
Below are some examples of typical modifications. Contact the PTT manufacturer for more details if necessary.
Procedures For David Clark PTT
Unscrew the round black plastic cover from the jack.
Connect the joined black wires to the red wire.
Replace the round black plastic cover.
Procedures for Telex PT-200
Unscrew the round black plastic cover from the jack.
Cut the red wire in the middle of the wire.
Strip both ends of the insulation.
Solder the two ends to the ground lug to the PTT jack.
Replace the round black plastic cover.
Procedures for Telex PT-300
Unscrew the round black plastic cover from the plug jack.
Remove the heat shrink material from the joined black wires.
Solder these two wires to the lug that has a white wire already soldered to it.
Replace the round black plastic cover
PS Engineering
PMA8000BT Audio Selector Panel and Intercom System
Installation and Operator’s Manual
200-890-1702 New, April 2011
Appendix B – PMA8000 Installation Drawings
J2 J1
Viewed from Back
15
30
44
1
16
31
15
30
44
1
16
31
Ground Lug
Ground Lug
475-440-0001 (x2)
Back plate assy
475-009-0001
ground lug (x2)
475-440-0001 (x2)
Screw w/washer
Ground lug detail
Rear plate detail (not to scale)
0.37in
3.87in
5.53in
6.04in
0.36in
0.96in
1.28in
6.31in
1.28in
Caution: Apply steady pressure to the bezel while screwing the unit into the tray to
ensure even seating of the unit and connectors.
PS Engineering
PMA8000BT Audio Selector Panel and Intercom System
Installation and Operator’s Manual
200-890-1702 Appendix C New, April 2011
Appendix C – J1 Connector Interconnect
Com 1 Audio Hi
Com 1 Mic Key
Com 1 Lo
Communications
Transceiver #1
Communications
Transceiver #2
Nav 1 Audio Hi
Nav 1 Audio Lo
VHF Nav 1
Nav 2 Audio Hi
Nav 2 Audio Lo
VHF Nav 2
DME Audio Hi
DME Audio Lo
DME Receiver
Com 2 SPR Load
Unswitched Input #1 Hi
Unswitched Audio Lo
Unswitched Audio #1
Unswitched Input #2 Hi
Unswitched Audio Lo
Unswitched Audio #2
Pilot Mic Audio Hi
Pilot Mic PTT
Pilot Mic Lo
36
37
38
39
MKR Ant.
1
2
RG-58A/U Coax
9
10
11
12
Com 1 Mic Audio Hi
Com 2 Audio Hi
Com 2 Mic Key
Com 2 Lo
13
14
15
30
Com 2 Mic Audio Hi
17
18
19
20
21
22
Com 2 Spr Load
Com 2 Spr Load
27
28
31
32
44
43
33
34
35
Telephone
3
4
5
TEL Audio Hi
TEL Mic Audio Hi
TEL Audio Lo
ADF Audio Hi
ADF Audio Lo
ADF Receiver
7
8
Notes:
1. All shields should be grounded at audio panel only.
Other end remains floating.
2. All Power, and Ground wires shall be #22 gage wire
Lighting #22 AWG, other wires minimum #24 AWG
3. All mic and headphone jacks must be isolated from ground.
4. Speaker loads may be required on some older transceivers.
Consult manufacturer's information.
COM 2 Speaker load is the only one provided in the PMA8000.
5. All shielded wires must be MIL 22750 or 27500.
6. Unswitched inputs 1, is always presented to speaker
and crew headphones, regardless of SPR switch or PTT.
7. COM active output provides a logic low when there
is activity on COMs or other selected audio. This is used to prioritze
audio warnings in some systems.
8. No connection to pins 25, and 26
9. DME audio is passed when AUX button is pressed
10. Unswitched #3 is adjustable
11. Unswitched #2 is selectable over the speaker
Pilot PTT
See Note 4
PMA8000B Connector, J1 (Sub-D 44-pin, male on tray)
Unswitched Input #3 Hi
Unswitched Audio Lo
Unswitched Audio #3
29
See Note 6, 10 & 11
Pass. Phones (R)
Pass Phones (L)
Pass. Phones Lo
Pass. 1 PhonesJack
Pass. 4 Phones Jack
Ext. Marker Lamp (Blue)
Ext. Marker Lamp (White)
Ext. Marker Lamp (Amber)
MM Sense Output
White Lamp Output
Blue Lamp Output
Amber Lamp
MM Sense
Ext. Marker Annunciator
Pass. 3 Phones Jack
Pass. 2 Phones Jack
24
COM Active Output
3/32" Cellular Jack
TEL Mic Input
TEL Audio
TEL Audio Lo
3
5
4
PMA8000BT
J1 Connector
Cellular Plug (typical)
Tip= Microphone out
Ring= Speaker audio
Base=Ground
Cellular Phone
Interconnect
See Note 7
AUX Audio Hi
AUX Audio Lo
AUX Receiver
23
41
40
42
PS Engineering
PMA8000BT Audio Selector Panel and Intercom System
Installation and Operator’s Manual
200-890-1702 Appendix D New, April 2011
Appendix D – J2 Connector Interconnect
22
20
31
16
1
35
36
24
23
25
4
3
2
Copilot Phones (R)
Copilot Phones (L)
Copilot Phones Lo
Pass. 1 Mic Jack
Pass. Mic Lo
Pass. Mic Hi
37
38
Pass. 2 Mic Jack
Pass. Mic Lo
Pass. Mic Hi
39
40
Pass. 3 Mic Jack
Pass. Mic Lo
Pass. Mic Hi
41
42
Pass. 4 Mic Jack
Pass. Mic Lo
Pass. Mic Hi
32
33
34
Copilot Mic Audio
Copilot PTT
Copilot Mic Lo
Copilot PTT
Copilot Mic Jack
14
13
Ent. #2 Mute
12
Playback
PMA8000B J2 CONNECTOR
(Sub-D 44-pin male on tray)
Ent. #2 Input
27
26
28
Ent. #2 Audio (R)
Ent. #2 Audio (L)
Ent. #2 Audio Lo
19
________
PA Active
Note 8
Notes:
Ent. #1 Audio (R)
Ent. #1 Audio (L)
Ent. #1 Audio Lo
Ent. #1 Input
5
6
7
Copilot PhonesJack
Pilot Phones (R)
Pilot Phones (L)
Pilot Phones Lo
Pilot PhonesJack
8
9
Ground Lug
Airframe Ground
11-33 VDC
See Note 4
PA Mute
18
30
Speaker Hi
Speaker Lo
44
43
Swap
Switch
Swap
10
11
Cockpit Speaker
1. All Power, and Ground wires must be #22 gage wire
Lighting #22 AWG, other wires minimum #24 AWG.
2. All shields should be grounded at audio panel only,
other end remains floating
3. Pins 8 and 9 connected through a 5 A breaker.
4. PA Mute is a TTL level logic output that is pulled
low when radio PTT active, for external systems.
5. All shielded wires must be MIL 22750 or 27500.
6. Optional switch to remotely activate playback
7. For music distribution information, see Section 2.5.1.
8. Pin 19 is pulled to ground when the PA mode is activated,
and pilot PTT active, for speaker relay control.
See Sect 2.4.11.
9. AUX enable goes low when AUX button is on. May be used for
passenger mute inhibit by connection to pin 13
Should NOT be used when DME is installed and
activated with AUX button.
10. Reserved
11. No connection to Pin 17, 29, 30
12. Use care when connecting music signal and ground inputs.
Refer to section 2.4.1.1 for more information.
Failure to properly interface music can result in
added noise.
13. Unswitched 4 audio low connected where
convenient, but should NOT go to ent. low
Unswitched Input #4 Hi
Unswitched Audio Lo
Unswitched Audio #4
15
See Note 9
7
6
5
28 V Lights Hi
28-Volt lights lo
7
6
5
14 V Lights Hi
14-Volt lights lo
AUX Enable
See Note 9
5A Breaker
See Note 3
Note 6
Note 12
Note 13
Lighting
See Sect. 2.4.9
Lighting See Sect. 2.4.9
PS Engineering
PMA8000BT Audio Selector Panel and Intercom System
Installation and Operator’s Manual
200-890-1702 Appendix E New, April 2011
Appendix E – Instructions for FAA Form 337 and continuing air-
worthiness
9.1 Instructions for FAA Form 337, Audio Panels
One method of airworthiness approval is through an FAA Form 337, Major Repair and Alteration (Airframe, Powerplant, Propeller, or Appliance) In the case of the PMA8000BT, you may use the following text as a guide.
Installed audio selector and 6-place intercom, PS Engineering PMA8000BT, part number 050-890-(XXXX) in ( location
) at station . Installed per AC43.13-2, Chapter 2, paragraph 23 (Instrument Panel Mounting). Installed per PS Engineering Installation Operators Manual p/n 200-890-(XXXX), revision (), dated ( ).
These units are FAA-Approved under TSO C50c for audio amplifiers, and/or TSO C35d for Marker Beacon Receivers,
and meets appropriate environmental qualifications outlined in RTCA DO-160D as appropriate or this aircraft.
Interface to existing aircraft radios in accordance with installation manual and in compliance with practices listed in
AC43.13-2, Chapter 2. All wires are Mil-Spec 22759 or 27500. Connection to aircraft dimmer bus is
____________________. Power is supplied to the unit through a 3A circuit breaker (type and part number), and total
electrical load does not exceed % of the electrical system capacity with the PMA8000BT added.
Aircraft equipment list, weights and balance amended. Compass compensation checked. A copy of the operation instructions, contained in PS Engineering document 202-890-( ), revision ( ), dated ( ), is placed in the aircraft records. All work
accomplished listed on Work Order .
9.2 Instructions for Continuing Airworthiness, Audio System
Sample ICA Checklist for PS Engineering Audio System:
Section
Item
Information
1
Introduction
Installation of audio control panel with integrated marker beacon receiver and
intercommunications system.
2
Description
Installation as described in manufacturer’s installation manual referenced on
FAA Form 337, including interface with other avionics audio as required.
3
Controls
See installation and operator’s guide referenced on FAA Form 337.
4
Servicing
None Required
5
Maintenance Instructions
On Condition, no special instructions
6
Troubleshooting
In the event of a unit problem, place the unit into “off,” “fail-safe” and/or
“emergency” mode. This allows pilot communications using COM 1. Follow
checkout instructions in the installation manual referenced on the FAA Form
337. For a specific unit fault, contact the manufacturer at (865) 988-9800 for
special instructions.
7
Removal and replacement information
Removal: Using a 3/32” Allen-head wrench, carefully unscrew the locking
screw located in the center of the unit. While turning the wrench CCW, gently
pull on the EDGES of the bezel until the unit is free from the mounting tray.
Installation: Engage the locking screw at the back. Turn the locking screw CW,
while applying slight pressure to the edges of the bezel. Do not over tighten!
8
Diagrams
Not applicable
9
Special Inspection Requirements
Not Applicable
10
Protective Treatments
Not Applicable
11
Structural Data
Not Applicable
12
Special Tools
None
13
Not Applicable
Not Applicable
14
Recommended Overhaul Periods
None
15
Airworthiness Limitations
Not Applicable
16
Revision
To be determined by installer
PS Engineering
PMA8000BT Audio Selector Panel and Intercom System
Installation and Operator’s Manual
200-890-1702 Appendix F New, April 2011
Appendix F – RTCA DO160D Environmental Qualification Form
Audio Selector Panel/Intercom/Marker Beacon Receiver
Part Number: 050-890-( )
FAA TSO Number: C50c, C35d
Manufacturer: PS Engineering Incorporated 9800 Martel Road Lenoir City TN 37772
Conditions
Section
Conducted Tests
Temperature and Altitude
Low Temperature
High Temperature
In-flight Loss of Cooling
Altitude
Decompression
Overpressure
4.0
4.5.1
4.5.2
4.5.4
4.6.1
4.6.2
4.6.3
Equipment tested to CAT A1 & D1
-55° C Survival, -15°C Low Operating (A1)
+85°C Survival, +70°C High Short Time Operating
Not Applicable, no cooling required
50,000’ unpressurized (D1)
Not Applicable
Not Applicable
Temperature variation
5.2
Equipment tested to Category C
Humidity
6.0
Equipment tested to Category A
Shock
7.0
Equipment tested to Operational test only
Operational
7.2
Equipment tested to Operational test only
Crash Safety
7.3
Equipment tested to Operational test only
Vibration
8.0
Equipment tested to Category M & N
Explosion
9.0
Category X, not tested
Waterproofness
10.0
Category X, not tested
Fluids Susceptibility
11.0
Category X, not tested
Sand and Dust
12.0
Category X, not tested
Fungus
13.0
Category X, not tested
Salt Spray
14.0
Category X, not tested
Magnetic Effect
15.0
Equipment tested to Category Z
Power input
16.0
Equipment tested to Category B
Voltage Spike
17.0
Equipment tested to Category A
Audio Frequency Susceptibility
18.0
Equipment tested to Category B
Induced Frequency Susceptibility
19.0
Equipment tested to Category A
Radio Frequency Susceptibility
20.0
Equipment tested to Category T
Radio Frequency Emission
21.0
Equipment tested to Category B
Lightning Induced Transient Susceptibility
22.0
Equipment tested to Category XXE2
Lightning Direct Effects
23.0
Category X, not tested
Icing
24.0
Category X, not tested
ESD
25.0
Category X, not tested
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