PS Engineering PMA7000H User guide

9800 Martel Road
Lenoir City, TN 37772
www.ps-engineering.com
P
PM MA A7 70 00 00 0H H
Document P/N 200-780-0429
Rev. 2 Feb. 2009
Audio Selector Panel with Marker Beacon Receiver
High-fidelity Stereo Intercom
System Installation and Operation Manual
FAA-Approved TSO C50c, C35d
JAA-Approved JTSO C50c, 2C35d
Patented under one or more of the following; No. 5,903,227; 6,160,496 and
6,493,450
PS Engineering, Inc. 2009©
Copyright Notice
Any reproduction or retransmittal of this publication, or any portion thereof, without the expressed written permission of PS Engi-
neering, Inc. is strictly prohibited. For further information contact the Publications Manager at PS Engineering, Inc., 9800 Martel
Road, Lenoir City, TN 37772. Phone [phone], email [e-mail].
In certified aircraft, warranty is not valid unless this product is installed by an
Authorized PS Engineering dealer.
PMA7000H

Table of Contents
SECTION I GENERAL INFORMATION .................................................................................... 1-1
1.1 INTRODUCTION...................................................................................................................... 1-1
1.2 SCOPE ....................................................................................................................................... 1-1
1.3 EQUIPMENT DESCRIPTION ................................................................................................. 1-1
1.4 APPROVAL BASIS - ................................................................................................................. 1-2
1.5 SPECIFICATIONS.................................................................................................................... 1-2
1.6 EQUIPMENT SUPPLIED......................................................................................................... 1-3
1.7 EQUIPMENT REQUIRED BUT NOT SUPPLIED .................................................................. 1-4
1.8 LICENSE REQUIREMENTS ................................................................................................... 1-4
SECTION II - INSTALLATION ................................................................................................... 2-1
2.1 GENERAL INFORMATION .................................................................................................... 2-1
2.1.1 SCOPE........................................................................................................................ 2-1
2.1.2 CERTIFICATION REQUIREMENTS................................................................................... 2-1
2.2 UNPACKING AND PRELIMINARY INSPECTION ............................................................................... 2-1
2.3 EQUIPMENT INSTALLATION PROCEDURES ................................................................................... 2-1
2.3.1 COOLING REQUIREMENTS............................................................................................ 2-1
2.3.2 MOUNTING REQUIREMENTS......................................................................................... 2-1
2.3.3 AUDIO PANEL MOUNTING RACK INSTALLATION........................................................... 2-2
2.3.4 AUDIO PANEL TRAY AND CONNECTOR ASSEMBLY....................................................... 2-2
2.4 CABLE HARNESS WIRING ............................................................................................................ 2-2
2.4.1 NOISE .......................................................................................................................... 2-3
2.4.2 POWER ........................................................................................................................ 2-3
2.4.3 AUDIO PANEL INTERFACE ............................................................................................ 2-3
2.4.4 COM 3 DUPLEX (TEL) FUNCTION FOR CELL PHONES ................................................... 2-4
2.4.5 TRANSMIT INTERLOCK................................................................................................. 2-4
2.4.6 "SWAP" MODE ............................................................................................................. 2-5
2.4.7 BACKLIGHTING ............................................................................................................ 2-5
2.4.8 UNSWITCHED INPUTS................................................................................................... 2-5
2.4.9 PA MUTE (J1, PIN 18).................................................................................................. 2-5
2.4.10 PUBLIC ADDRESS FUNCTION (J2, PIN 18) ................................................................... 2-5
2.4.11 CONTROL OUTPUT (J2, PIN A) ................................................................................... 2-5
2.4.12 COCKPIT VOICE RECORDER OUTPUT.......................................................................... 2-5
2.4.13 INTERCOM WIRING ..................................................................................................... 2-6
2.5 MARKER BEACON INSTALLATION ............................................................................................... 2-7
2.5.1 MARKER ANTENNA INSTALLATION .............................................................................. 2-7
2.5.2 EXTERNAL MARKER LIGHTS........................................................................................ 2-7
2.5.3 MIDDLE MARKER SENSE ............................................................................................. 2-7
2.6 ADJUSTMENTS ............................................................................................................................. 2-7
2.7 COMMUNICATIONS ANTENNA INSTALLATION NOTES .................................................................. 2-8
2.7.1 HOOK SWITCHES ......................................................................................................... 2-8
2.8 PMA7000H PIN ASSIGNMENTS.................................................................................................... 2-9
2.9 POST INSTALLATION CHECKOUT ............................................................................................... 2-10
2.10 UNIT INSTALLATION ................................................................................................................ 2-10
2.10.1 REQUIRED TEST EQUIPMENT ................................................................................... 2-10
2.10.2 OPERATIONAL CHECKOUT ....................................................................................... 2-10
2.10.3 RECEIVER SENSITIVITY ............................................................................................ 2-12
2.11 CELLULAR INTERFACE CHECKOUT ......................................................................................... 2-12
2.12 FINAL INSPECTION................................................................................................................... 2-12
SECTION III OPERATION .......................................................................................................... 3-1

PS Engineering
PMA7000H Series Audio Selector Panel and Intercom System
Installation and Operator’s Manual
200-780-0429 Page ii Rev. 2 Feb. 2009
3.1 SCOPE ....................................................................................................................................... 3-1
3.2 POWER SWITCH (EMG-FAIL SAFE OPERATION) ......................................................................... 3-1
3.3 MICROPHONE (XMT) SELECTION (ALL MODELS)....................................................................... 3-1
3.3.1 SWAP MODE (SWITCH FROM COM 1 TO COM 2 REMOTELY) ......................................... 3-2
3.4 AUDIO SELECTOR (ALL MODELS)................................................................................................ 3-2
3.4.1 SPEAKER AMPLIFIER.................................................................................................... 3-2
3.4.2 KEY “CLICK”............................................................................................................... 3-2
3.5 SPLIT MODE ................................................................................................................................ 3-3
3.5.1 SPLIT MODE ICS.......................................................................................................... 3-3
3.6 INTERCOM OPERATION ............................................................................................................... 3-3
3.6.1 INTELLIVOX® VOX-SQUELCH...................................................................................... 3-3
3.6.2 INTERCOM VOLUME CONTROL .................................................................................... 3-4
3.6.3 INTERCOM MODES....................................................................................................... 3-4
3.7 PUSH-TO-TALK INTERCOM MODE............................................................................................... 3-6
3.8 TELEPHONE MODE...................................................................................................................... 3-6
3.9 MARKER BEACON OPERATION.................................................................................................... 3-6
SECTION IV- WARRANTY AND SERVICE .............................................................................. 4-1
4.1 WARRANTY ................................................................................................................................. 4-1
4.2 FACTORY SERVICE ...................................................................................................................... 4-1
APPENDIX A – PMA7000H INSTALLATION DRAWING...........................................................................A
APPENDIX B BOTTOM CONNECTOR INTERCONNECT.........................................................................B
APPENDIX C TOP CONNECTOR INTERCONNECT.......................................................................................C
APPENDIX D- INSTRUCTIONS FOR FAA FORM 337 AND CONTINUING AIRWORTHINESS...........D
8.1 INSTRUCTIONS FOR FAA FORM 337, AUDIO PANELS........................................................................................D
8.2 INSTRUCTIONS FOR CONTINUING AIRWORTHINESS, AUDIO SYSTEM ..................................................................D
APPENDIX E RTCA DO160C (EUROCAE ED-14) ENVIRONMENTAL QUALIFICATION FORM................E
Revision History
Rev
By
Date
Change
New
GP
8/3/06
New Release
1
GP
2/6/07
Updated Graphics
2
GP
1/28/09
Updated for 10 place, new bezel, ALT ICS mode.

PS Engineering
PMA7000H Series Audio Selector Panel and Intercom System
Installation and Operator’s Manual
200-780-0429 Page 1-1 Rev. 2 Feb. 2009
Section I GENERAL INFORMATION
1.1 INTRODUCTION
The PMA7000H represents the next step in cockpit audio control and intercommunications utility. Using
proprietary IntelliVox® design, this unit eliminates the requirements for intercom squelch adjustments.
The unit is designed for outstanding ergonomics and visually defined mode annunciation and selection.
Before installing and/or using this product, please read this manual completely. This will ensure that you
will take full advantage of all the advanced features in the PMA7000H.
1.2 SCOPE
This manual provides detailed installation and operation instructions for the PS Engineering PMA7000H-
of Audio Selector Panel/Intercom Systems. This includes the following units:
Model
Description
Part Number
PMA7000H
Stereo Audio Selector Panel with Marker Beacon
7000H
1.3 EQUIPMENT DESCRIPTION
The PMA7000H- is an audio isolation amplifier / audio selector that contains a 10-place (9-places in units
with serial number starting with “A” Serial Number “B” and above have 10-places) automatic voice acti-
vated (VOX) intercom system. It can switch up to three transceivers (Com 1, Com 2 and Com 3) and six
receivers (Nav 1, Nav 2, ADF, DME, MKR and AUX).
A duplex COM 3 mode (selectable at installation) allows the PMA7000H to act as an audio interface b e-
tween aircraft headphone and microphones and specific aircraft approved (FAA/FCC) cellular telephone
equipment.
Warning: Use of non-aviation approved cellular telephone equipment in flight may be prohibited by
regulation.
PS Engineering is not responsible for unauthorized airborne use of cellular telephones.
For airborne use, the PMA7000H must be interfaced with an approved system.
There are four unswitched inputs, available for traffic or EGPWS, autopilot disconnect, and/or radar a l-
timeter warning.
Push buttons select the receiver audio source provided to the headphones. A SPR button allows the user to
listen to the receiver(s) selected on the cabin speaker. Except for the unswitched inputs, all speaker audio
is muted during transmit.
Push button switches select one of the communication transceivers for the pilot and copilot position, and
allows radio transmission. In "Split Mode" the PMA7000H has the ability to allow the pilot and copilot to
operate different transceivers independently. The Com 3/TEL mode (selected at installation) allows t he
pilot to use the audio panel for duplex operation, such as with aviation -specific cellular telephones. Exter-
nal switches permit telephone operation for the copilot and passengers.
A fail-safe mode connects the pilot headphone and microphone to COM 1 and unswitched input #1 if
power is removed for any reason, or if the power switch is placed in the Off (Fail-safe) position.
A 9-station voice activated (VOX) intercom is included in the PMA7000H. This system has PS Engineer-
ing’s exclusive IntelliVox® circuitry that eliminates manual adjustments. The system contains nine sepa-
rate VOX mic circuits, and only opens the microphone channel in use.

PS Engineering
PMA7000H Series Audio Selector Panel and Intercom System
Installation and Operator’s Manual
200-780-0429 Page 1-2 Rev. 2 Feb. 2009
The intercom system incorporates pilot isolate and crew modes, two independent stereo music inputs with
"Soft Mute," and flashing LED indicators for transmit indications. Intercom control is through two front
panel- mounted volume knobs and 3-position mode switch. The concentric volume controls the intercom
level for the pilot and copilot, while the outer knob controls the passenger intercom volume. Intercom
squelch is automatic.
A 3-light Marker Beacon receiver is integrated in the PMA7000H. This provides the necessary Marker
Beacon lights and audio indications necessary for an Instrument Landing System (ILS) approach.
1.4 APPROVAL BASIS -
TSO Approval.
The PMA7000H Audio Selector Panels are FAA approved under TSO C50c (Audio Amplifiers) and TSO
C35d (Marker Beacon Receivers). In addition, they are approved by the Joint Airworthiness Authorities
under JTSO C50C and JAR-TSO 2C35d.
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 (Software Considerations for Airborne Equipment) and ED- 18/DO-214
(Audio Systems Characteristics and Minimum Operational Performance Standards for Aircraft Audio
Systems).
Operation is subject to the following conditions:
This device may not cause harmful interference.
This device must accept any interference received, including interference that may cause undesired oper a-
tion.
1.5 SPECIFICATIONS
TSO COMPLIANCE
Marker Beacon:
C35d, Class A
Audio Selector/Intercom:
C50c, Class A
APPLICABLE DOCUMENTS:
RTCA/DO-214 RTCA/DO-143 RTCA/DO-160C
RTCA/DO-178B
ENVIRONMENTAL Qualifications:
A1D1/CA(MN)XXXXXXBBBBTBKXX
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: 6.8 in. (17.3 cm)
WEIGHT (With Rack & Connectors):
1.5 lb. (0.54 kg)
POWER REQUIREMENTS (Including Internal Lighting):
Voltage:
11 to 33 VDC
Maximum Current:
2.5 Amp (Externally protected by a 3A pull-type
breaker)

PS Engineering
PMA7000H Series Audio Selector Panel and Intercom System
Installation and Operator’s Manual
200-780-0429 Page 1-3 Rev. 2 Feb. 2009
Audio Selector Specifications
Audio selector panel input impedance:
510 
Input Isolation:
-60 dB (min.)
Speaker Muting:
-60 dB (min.)
Speaker Output (into 4 ) with no clipping
14 VDC:
28 VDC:
3 Watts (min.)
10 Watts (min.)
Receiver Inputs:
9 (Com 1, Com 2, Com 3, Nav 1, Nav 2, ADF,
DME, MKR, AUX)
Unswitched Inputs:
4
Transmitter Selections:
5 (Com 1, Com 2, Com 3
Com1/2, Com1/3)
Speaker Impedance:
4 
Headphone Impedance:
150 – 1000 
Headphone Output:
38 mW each headset, no clipping <1% THD
Microphone Impedance:
150 - 600 
Intercom Specifications
Intercom Positions:
10 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:
20 Hz - 18kHz
MARKER BEACON RECEIVER: (if equipped)
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)
1.6 EQUIPMENT SUPPLIED
1 ea. of the following units:
Model
Description
Part Number
PMA7000H
PMA7000H Audio Panel with Marker Beacon and Stereo intercom.
7000 H
PMA7000H Installation Kit: 250-007-0002
Description
Quantity
Part
Number
PMA7000 installation rack assembly
1
120-430-0420
Top Molex Connector Shell w/key, 44 pin, key 4/5
1
120-425-4402
Bottom Molex Connector Shell w/key, 44 pin, key 7/8
1
120-425-4400
Gold Plated Crimp Pins
88
425-001-0002
4 40 X 7/16 screw w/nylon patch
4
475-440-0007
Grounding bar
1
430-007-0001
6-32 X 3/4 pan head Phillips screw
2
475-632-0038
6-32 Nut Flat
2
475-632-0003

PS Engineering
PMA7000H Series Audio Selector Panel and Intercom System
Installation and Operator’s Manual
200-780-0429 Page 1-4 Rev. 2 Feb. 2009
Installation Kit Description
Quantity
Part
Number
6-32 Lock Nut
2
475-632-0004
Cable Clamp
1
625-001-0002
#6-32 x ½” Flat head Phillips screw
6
475-632-0012
#6-32 Clip Nut
6
475-630-0002
Parts identification sheet
1
002-250-7028
1.7 EQUIPMENT REQUIRED BUT NOT SUPPLIED
a) Circuit Breaker: 1 ea; 3 amp PULL TYPE REQUIRED for PMA7000H
b) Speaker, 4 
c) Headphone Jacks (Stereo, as Required)
d) Microphone Jacks (as Required)
e) Headphones, 150  (Stereo), up to 9, as required
f) Microphones, up to 9, as required
g) Marker Antenna (75 MHz, VSWR <1:1.5, and appropriate for the airspeed)
h) Interconnect Wiring
1.8 LICENSE REQUIREMENTS
None

PS Engineering
PMA7000H Series Audio Selector Panel and Intercom System
Installation and Operator’s Manual
200-780-0429 Page 2-1 Rev. 2 Feb. 2009
Section II - Installation
2.1 GENERAL INFORMATION
2.1.1 SCOPE
This section provides detailed installation and interconnection instructions for the PS Engineering
PMA7000H Audio Selector Panel/Intercom/ with internal Marker Beacon.
Please read this manual carefully before beginning any installation to prevent damage and post -
installation problems. Installation of this equipment requires special tools and knowledge.
2.1.2 Certification Requirements
NOTE
The PMA7000H requires specialized knowledge and tools for an effective installation. An
appropriately rated Certified Aircraft Repair Station or Aircraft Manufacturer 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 indi-
vidual 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 mate-
rial 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 PMA7000H 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 ade-
quate cooling air provided.
2.3.2 Mounting Requirements
The PMA7000H must be rigidly mounted to the instrument panel of the aircraft structure and within view
and reach of the pilot position(s). Installation must comply with FAA Advisory Circular AC 43.13 -2A.
The unit may be mounted in any area where adequate clearance for the unit and associated wiring bu ndle
exist.
Avoid installing the unit close to high current devices or systems with high-voltage pulse type outputs,
such as DME or transponders. Avoid running the interconnecting bundles near any high current wires.

PS Engineering
PMA7000H Series Audio Selector Panel and Intercom System
Installation and Operator’s Manual
200-780-0429 Page 2-2 Rev. 2 Feb. 2009
2.3.3 Audio Panel Mounting Rack Installation
Remove the unit from the mounting tray by unscrewing the 3/32" hex-head screw that is in the center of
the unit. Use caution to avoid hitting the photo-detector lens. Carefully slide the unit free of the tray. Set
the unit aside in a safe location until needed. Install the tray using six clip nuts (475 -630-0002), and six
FHP 6-32 x ½" screws (475-632-0012). The audio selector panel must be supported at front and rear of
the mounting tray.
2.3.4 Audio Panel Tray and Connector Assembly
The unit connectors mate directly with the circuit boards in the PMA7000H. The connectors are a Molex
crimp-type, and require the use of a Molex hand crimp tool, EDP P/N 11-01-0203, CR6115B (or equiv.).
The connectors are mounted to the unit tray with #4-40 screws (475-440-0007), from the inside of the
tray. Ensure that proper strain relief and chafing precautions are made during wiring and install ation,
using the cable clamp (625-001-0002). Secure the ground bar (430-007-0001), if desired using, #6-32 nuts
(475-632-0003) and #6-32 lock nuts (475-632-0004).
Figure 2-1 Audio Panel Tray Assembly Drawing
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, shield-
ing and soldering technique must be used at all times. It is imperative that correct wire be used.
120-430-0420

PS Engineering
PMA7000H Series Audio Selector Panel and Intercom System
Installation and Operator’s Manual
200-780-0429 Page 2-3 Rev. 2 Feb. 2009
Refer to FAA Advisory Circular 43.13-2A for more information. Failure to use correct techniques may
result in improper operation, electrical noise or unit failure. Damage caused by improper installation will
void the PS Engineering warranty.
NOTE: PS Engineering can make a custom wiring harness for the intercom. Call 1-800-ICS-AERO or see
www.ps-engineering.com for details.
2.4.1 Noise
Due to the variety and the high power of radio equipment often found in today's general aviation aircraft,
there is a potential for both radiated and conducted noise interference.
The PMA7000H 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 l east 13.8 VDC present at the bottom
connector, pin 20, of the PMA7000H 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., be a-
con, electric gyros, switching power supplies, etc.) However, installation combinations can occur where
interference is possible. The PMA7000H was designed in a RFI hardened chassis and has internal Elec-
tromagnetic 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 power loads such as strobes, inverters, etc., can inject noise signals onto the
airframe that are detected by the audio system. Follow the wiring diagram very carefully to help ensure a
minimum of ground loop potential. Use only Mil Spec shielded wires (MIL-C-275000, or better). Under
no circumstances combine a microphone and headphone wiring into the same shielded bundle. Always
use a 2- or 3-conductor, shield wire as shown on the installation wiring diagram.
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.
Adding a high-performance audio control system, particularly in conjunction with high -performance ac-
tive 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 in-
stallation conditions, particularly with older avionics.
2.4.2 Power
The PMA7000H are compatible with both 14 and 28 Volt DC systems. A two (2) Amp circuit breaker is
required for 14 VDC installations, and a three (3) Amp breaker for 28 VDC aircraft. Power and ground
wires should be a twisted #18 AWG pair. Connect airframe power ground to J1 (bottom connector) Pin Z
only. No dropping resistors are required.
2.4.3 Audio Panel interface
The PMA7000H is designed to interface with standard aircraft avionics, and presents a 500 receiver
impedance. For best results, a twisted-shielded cable is recommended from the avionics audio source to
the audio panel, with the shield grounded at the audio panel end.
Some avionics do not provide a separate audio low, and may introduce additional electrical noise into the
system. For best results, connect the audio low from the audio panel to the radio ground, using one con-
ductor of the twisted-shielded cable.
2.4.3.1 Fail Safe Audio
When the audio panel is off, or power is removed, the pilot’s right headphone will have the COM 1 audio,
and the Unswitched Audio #1 (J1-17). It is imperative that Pin 3, J1 (bottom connector) be connected to
pilot’s headphone tip contact.