PS Engineering PMA7000S, PMA7000M-S Installation And Operation Manual

9800 Martel Road

Lenoir City, TN 37772

PMA7000S

PMA7000M-S

with Options

Com 1/2

V
o
l
u
m
e

O

M

I

Push
(Fail-Safe)

High

Com 1 Nav 1

Low
Test

Iso
All
Crew

Nav 2Com 2

ENGINEERING
INCORPORATED

Com 1

MKR ADF

AUXICS

R

PMA7000M-S

DME

SPR

Com 2

Com 3

Transmit Swap

Document P/N 200-070-0006

Revision 6, Nov 1998

FAA-Approved TSO C50c, C35d

High-fidelity Stereo Audio Selector Panel

Intercom System

Installation and Operation Manual

In certified aircraft, warranty is not valid unless this product is installed by

an Authorized PS Engineering dealer.

Com 2/1

Tel

Any reproduction or retransmittal of this publication, or any portion thereof, without the expressed written permission of PS
Engineering, Inc. is strictly prohibited. For further information contact the Publications Manager at PS Engineering, Inc., 9800
Martel Road, Lenoir City, TN 37772. Phone [phone]

PS Engineering, Inc. 1998 ©

Copyright Notice

Table of Contents

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

1.5 SPECIFICATIONS.................................................................................................... 1-3

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

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

1.8 LICENSE REQUIREMENTS ................................................................................... 1-4

2 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 ................................................................ 2-2

2.3.1 COOLING REQUIREMENTS ...................................................................................... 2-2

2.3.2 MOUNTING REQUIREMENTS ................................................................................... 2-2

2.3.3 MOUNTING RACK INSTALLATION ........................................................................... 2-2

2.3.4 CONNECTOR ASSEMBLY......................................................................................... 2-2

2.4 CABLE HARNESS WIRING .......................................................................................... 2-2

2.4.1 NOISE .................................................................................................................... 2-3

2.4.2 EXISTING KMA-24 INSTALLATION ......................................................................... 2-3

2.4.3 EXISTING PMA6000 INSTALLATIONS...................................................................... 2-3

2.4.4 POWER................................................................................................................... 2-4

2.4.5 EXTERNAL PUSH-TO-TALK..................................................................................... 2-4

2.4.6 TRANSMIT INTERLOCK........................................................................................... 2-4

2.4.7 "SWAP" MODE ....................................................................................................... 2-4

2.4.8 BACKLIGHTING ...................................................................................................... 2-4

2.4.9 UNSWITCHED INPUTS ............................................................................................. 2-5

2.4.10 INTERCOM WIRING................................................................................................2-5

2.4.11 COM 3 AUDIO.......................................................................................................2-6

2.4.12 PA MUTE (J1, PIN 18).......................................................................................... 2-6

2.4.13 VOX OVERRIDE (J2, PIN U)................................................................................. 2-6

2.4.14 IRS INSTALLATION (OPTION 1, AND 2) ................................................................. 2-7

2.4.15 AUDIO MESSAGE INSTALLATION (OPTION 1 AND 2 ONLY)..................................... 2-7

2.5 MARKER INSTALLATION (PMA7000M-S) ................................................................. 2-7

2.5.1 MIDDLE MARKER SENSE........................................................................................ 2-7

2.5.2 EXTERNAL MARKER LIGHTS (7000MS).................................................................. 2-8

2.5.3 MARKER ANTENNA INSTALLATION......................................................................... 2-8

2.5.4 MARKER INPUT (7000, 7000S)............................................................................... 2-8

2.6 ADJUSTMENTS ............................................................................................................ 2-8

2.7 COMMUNICATIONS ANTENNA INSTALLATION NOTES............................................... 2-8

2.8 WIRELESS TELECOMMUNICATIONS INTERFACE........................................................ 2-9

2.8.1 HOOK SWITCHES.................................................................................................... 2-9

2.9 PMA7000M-S PIN ASSIGNMENTS ............................................................................ 2-11

PMA7000M-S Series Audio Selector Panel and Intercom System

PS Engineering

Installation and Operator’s Manual

2.10 POST INSTALLATION CHECKOUT........................................................................... 2-12

2.11 UNIT INSTALLATION............................................................................................... 2-12

2.11.1 OPERATIONAL CHECKOUT.................................................................................. 2-12

2.11.2 RECEIVER SENSITIVITY....................................................................................... 2-13

2.12 CELLULAR INTERFACE CHECKOUT ....................................................................... 2-13

2.13 INTERNAL RECORDER CHECKOUT......................................................................... 2-13

2.14 DIGITAL ANNUNCIATION CHECKOUT.................................................................... 2-14

2.15 FINAL INSPECTION.................................................................................................. 2-14

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

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

3.2 AUDIO SELECTOR (ALL MODELS).............................................................................. 3-1

3.2.1 SPEAKER AMPLIFIER .............................................................................................. 3-2

3.3 POWER SWITCH (FAIL SAFE OPERATION)................................................................. 3-2

3.4 MICROPHONE SELECTOR........................................................................................... 3-2

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

3.5 SPLIT MODE ............................................................................................................... 3-3

3.5.1 SPLIT MODE ICS.................................................................................................... 3-3

3.6 INTERCOM .................................................................................................................. 3-4

3.6.1 INTELLIVOX™ VOX-SQUELCH ............................................................................... 3-4

3.6.2 VOLUME CONTROL ................................................................................................ 3-4

3.6.3 INTERCOM MODES................................................................................................. 3-5

3.7 TELEPHONE MODE..................................................................................................... 3-6

3.8 MARKER BEACON (PMA7000M-S)............................................................................ 3-7

3.9 INTERNAL RECORDER SYSTEM (OPTION 1 AND 2 ONLY).......................................... 3-7

3.9.1 OPERATION............................................................................................................ 3-8

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

4.1 WARRANTY................................................................................................................. 4-1

4.2 FACTORY SERVICE ..................................................................................................... 4-1

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

6 APPENDIX B – INSTALLATION DRAWING ................................................................ B

7 APPENDIX C BOTTOM CONNECTOR INTERCONNECT ......................................... C

8 APPENDIX D TOP CONNECTOR INTERCONNECT ................................................... D

9 APPENDIX E- INSTRUCTIONS FOR FAA FORM 337 AND CONTINUING

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

9.1 INSTRUCTIONS FOR FAA FORM 337, AUDIO PANELS................................................... E

INSTRUCTIONS FOR CONTINUING AIRWORTHINESS, AUDIO PANELS ................. E

10 APPENDIX F RTCA DO160C ENVIRONMENTAL QUALIFICATION FORM ......... F

200-070-0006 Page ii Rev 5, Nov 98

PMA7000M-S Series Audio Selector Panel and Intercom System

PS Engineering

Installation and Operator’s Manual

1 Section I GENERAL INFORMATION

1.1 INTRODUCTION

The PMA7000M-S represents the next step in cockpit audio control and intercommunica­tions. 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 PMA7000M-S.

1.2 SCOPE

This manual provides detailed installation and operation instructions for the PS Engineer­ing PMA7000M-S-series of Audio Selector Panel/Intercom Systems. This includes the
following units:

Model Description Part Number
PMA7000S Stereo Audio Selector Panel 7000S
PMA7000M-S Stereo Audio Panel with Marker 7000MS
Option 1 added to any unit Same as above, with optional recorder and mes-

sage system

Option 2 added to any unit Same as above, with optional recorder and mes-

sage system for Vista Map Software

Option 3 added to any system Black bezel (no silver trim) Opt 3

Opt.1

Opt 2

Where the functions are identical to all units, it will be referred to herein as a PMA7000M­S. Otherwise, the applicable units will be specified.

1.3 EQUIPMENT DESCRIPTION

The PMA7000M-S-series is a state of the art audio isolation amplifier and audio selector
that contains an automatic voice activated (VOX) intercom system. It can switch up to
three transceivers (Com 1, Com 2 and Com 3) and six receivers (Nav 1, Nav 2, ADF,
DME, MKR and AUX).

The TEL mode allows the PMA7000M-S to act as an audio interface between aircraft
headphone and microphones and specific aircraft approved (FAA/FCC) cellular telephone
equipment.

Warning

: Use of non-aviation approved cellular telephone equipment is prohibited by regul ation.

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

The PMA7000M-S is only interfaced to the Trimble TrimConnect 3100 D at this time.

There are two unswitched inputs, for autopilot disconnect, and/or radar altimeter warning.
Push buttons select the receiver audio source provided to the headphones. A SPR button

200-070-0006 Page 1-1 Rev. 6, Nov 98

PMA7000M-S Series Audio Selector Panel and Intercom System

PS Engineering

Installation and Operator’s Manual

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.

A rotary switch selects one of the three communication transceivers for the pilot and co­pilot position, and allows radio transmission. In "Split Mode" the PMA7000M-S has the
ability to allow the pilot and copilot to operate different transceivers independently. The
TEL mode allows the pilot to use the cellular telephone interface. External switches per­mit telephone operation for the copilot and passengers.

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.

A six-station voice activated (VOX) intercom is included in the PMA7000M-S. This sys­tem has PS Engineering’s exclusive IntelliVox™ circuitry that eliminates manual adjust­ments. The system contains six separate VOX mic circuits, and only opens the microphone
channel in use.

The intercom system incorporates pilot isolate and crew modes, two stereo (or mono de­pending on unit) music inputs with "Soft Mute," and LED indicators for swap and trans­mit indications. Intercom control is through front panel-mounted knob and 3 position
mode switch. A single volume controls intercom level for the pilot and copilot. Passenger
headphone volume is factory set, and adjusted in flight with headset-mounted volume
controls. Passenger volume control is further adjustable through screwdriver access in the
top of the unit. Intercom squelch is automatic.

An optional 3-light Marker Beacon receiver is integrated in the PMA7000M-S. This pro­vides the necessary Marker Beacon lights and audio indications necessary for an Instru­ment Landing System (ILS) approach.

1.4 APPROVAL BASIS - FAA

TSO Approval.
The PMA7000M-S, and PMA7000S Audio Selector Panels are FAA approved under

TSO C50c (Audio Amplifiers) and TSO C35d (Marker Beacon Receivers).
All systems comply with relevant portions of RTCA DO-143 (Marker Beacon Receivers),

DO-160C (Environmental Conditions and Test Procedures for Airborne Equipment),
DO-178B (Software Considerations for Airborne Equipment) and DO-214 (Audio Sys-

tems Characteristics and Minimum Operational Performance Standards for Aircraft
Audio Systems).

NOTE: The optional message annunciators contained in Option 1 and Option 2 are not
TSO-approved, and the installer must determine the relevant approval basis prior to in­stallation. Contact PS Engineering for information regarding FAA approval.

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PMA7000M-S Series Audio Selector Panel and Intercom System

PS Engineering

Installation and Operator’s Manual

Operation is subject to the following conditions:
This device may not cause harmful interference.
This device must accept any interference received, including interference that may cause
undesired operation.

1.5 SPECIFICATIONS

TSO COMPLIANCE

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

APPLICABLE DOCUMENTS: RTCA/DO-214

RTCA/DO-143
RTCA/DO-160C
RTCA/DO-178B

ENVIRONMENTAL Qualifications: A1D1/CA(MN)XXXXXXBBBBTBKXX

Temperature Range:

Operating:
Storage:
Altitude: Up to 50,000 feet in an unpressurized area of the

DIMENSIONS: Height: 1.3 in. (3.3 cm) Width: 6.25 in. (16.9 cm)

WEIGHT (With Rack & Connectors): 1.5 lb. (0.54 kg)

POWER REQUIREMENTS (Including Internal Lighting):

Voltage: 11 to 33 VDC
Maximum Current: 1.5 Amp (Externally protected by a 3 Amp circuit

Typical operating current:

Speaker off:
Speaker on, 28V, full radio volume

Audio Selector Specifications

Audio selector panel input impedance:
Input Isolation: -60 dB (min.)
Speaker Muting: -60 dB (min.)
Speaker Output (into 4 Ω) with no clipping

14 VDC:
28 VDC:

Receiver Inputs: 9

Unswitched Inputs: 2

Transmitter Selections: 6

Speaker Impedance:
Headphone Impedance:
Headphone Output: 38 mW each headset, no clipping <1% THD

Microphone Impedance:

-20º C to 55ºC

-40º C to 85ºC

cockpit.

Depth: 6.8 in. (17.3 cm)

breaker.)

350 mA

1.5 A

510 Ω

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

(Com 1, Com 2, Com 3, Nav 1, Nav 2, ADF,
DME, MKR, AUX)

(examples: GPS WPT, Value, Autopilot Discon­nect, Altimeter DH)

(Com 1, Com 2, Com 3
Com1/2, Com2/1, Telephone)
4 Ω
150 - 1000 Ω

70 mW each headset with < 10% THD into 150Ω
150 - 600 Ω

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PMA7000M-S Series Audio Selector Panel and Intercom System

Intercom Positions: 6 places (with individual IntelliVOX circuits)
Music Inputs: 2 (Stereo)
Music Muting: >-50 dB "Soft Mute" when Com or intercom ac-

Distortion:

Mic Freq. Response, 3 dB: 300 Hz - 6000 Hz
Music Freq. Response, 3 dB: 100 Hz - 18kHz

MARKER BEACON RECEIVER:PMA7000M-S only

Frequency: 75 MHz Crystal Controlled
Sensitivity:

Low:
High:

Selectivity: -6 dB at ±110 kHz

External Lamp Output: 9.0 (±2.5 photocell dimmed) VDC positive when

MM Sense: Active high (4.7 VDC ± 0.5V) during Middle

PS Engineering

Installation and Operator’s Manual

Intercom Specifications

tive.
<1% THD @ 38 mW into 150Ω
<10% THD @ 70mW into 150 Ω

1000 µVolts (Hard)
200 µVolts (Hard)
(Field Adjustable)

-40 dB at ±120 kHz

active, max. current 125 mA

Marker acquisition, for autopilot use.

1.6 EQUIPMENT SUPPLIED

1 ea. of the following units:

Model Part Number

PMA7000S 7000S
PMA7000M-S 7000M-S

PMA7000M-S Installation Kit: 250-007-002

Part Number Description Quantity

001-006-0001 Tray with (2) 44 Pin Connectors 1
655-000-0001 Gold Plated Crimp Pins 88
200-070-0001 Operator's and Installation Manual 1

1.7 EQUIPMENT REQUIRED BUT NOT SUPPLIED

a) Circuit Breaker: 1 ea. 2 amp. (14V) or 3 amp (28V)
b) Speaker, 4 Ω
c) Headphone Jacks (mono or stereo, as Required)
d) Microphone Jacks (as Required)
e) Headphones, 150 Ω (mono or 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 LICENSE REQUIREMENTS

None

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PMA7000M-S Series Audio Selector Panel and Intercom System

PS Engineering

Installation and Operator’s Manual

2 Section II - Installation

2.1 GENERAL INFORMATION

2.1.1 SCOPE

This section provides detailed installation and interconnect instructions for the PS Engi­neering PMA7000S-Series Audio Selector Panel/Intercom System and PMA7000M-S­Series Audio Selector Panel/Intercom System with internal Marker Beacon.

With the exception of the internal marker beacon receiver, the PMA7000S, and
PMA7000M-S are identical. All units will be identified hereafter as the PMA7000M-S,
where the information applies to all.

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.

NOTE: 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 non­certified individual or agency will void the warranty, and may result in an unairworthy in­stallation.

2.1.2 Certification Requirements

When the digital audio warning system is installed in a certified aircraft, certification basis
is the installer’s responsibility. Due to the variety and options available for interface, PS
Engineering, will only provide manufacturers data for our equipment interface. Contact PS
Engineering for more details.

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 shows 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.

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Installation and Operator’s Manual

2.3 Equipment Installation Procedures

2.3.1 Cooling Requirements

Forced air cooling of the PMA7000M-S is not required. However the unit 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 PMA7000M-S 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 bundle exist.

Avoid installing the audio panel close to high current devices or systems with high-voltage
pulse type outputs, such as DME or transponders.

NOTE: The mounting hole configuration for the PMA7000M-S is identical to the

PMA6000 series and KMA-24 Audio Selector Panels.

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

2.3.4 Connector Assembly

The unit connectors mate directly with the circuit boards in the PMA7000M-S. 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 #4­40 screws, from the inside of the tray. Ensure that proper strain relief and chafing precau­tions are made during wiring and installation.

2.4 Cable Harness Wiring

Referring to the appropriate Appendix, assemble a wiring harness as required for the in­stallation. All wires must be MIL-SPEC in accordance with current regulations. Two- and
three-conductor shielded wire must be used where indicated, and be MIL-C-27500 or
equivalent specification. Proper stripping, shielding and soldering technique must be used
at all times. It is imperative that correct wire be used.

Refer to FAA Advisory Circular 43.13-2A for more information. Failure to use correct
techniques may result in improper operation, electrical noise or unit failure. Damage
caused by improper installation will void the PS Engineering warranty.

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Installation and Operator’s Manual

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 PMA7000M-S 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 bottom connector, pin 20, of the
PMA7000M-S 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 PMA7000M-S 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).

Radiated signals can be a factor when low level microphone signals are "bundled" with
current carrying power wires. Keep these cables physically separated. It is very important
that you use insulated washers to isolate the ground return path from the airframe to all
headphone and microphone jacks.

2.4.2 Existing KMA-24 Installation

If the installation replaces a KMA-24 (series -01, -02 or -03), the existing 44 pin connec­tor can be used for the bottom connector of the PMA7000M-S tray as is, providing it is
properly installed and wired. No other changes are required except for external marker
lights (see Section 3.7.2 for details). The "key" in the existing connector must be located
between pins 7 and 8. This connector will be used in the bottom connector position. (See
Appendix for complete wiring harness details.)

The existing ground bus may be reused for radio shield connections, if it was constructed
so it can be relocated to the PMA7000M-S tray.

2.4.3 Existing PMA6000 installations

In 28-Volt aircraft, the dropping resistor may be removed, however, the 2 Amp breaker
should be changed to 3 Amp. If both old unit is stereo (PMA6000S or PMA6000MS), no
rewiring is necessary unless additional features are added.

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2.4.3.1 Stereo PMA7000M-S installations into monaural PMA6000, PMA6000M.

Installations replacing PMA6000 or PMA6000M require re-wiring of the top connector to
accommodate the stereo configuration. See appendixes for detailed interconnect informa­tion.

2.4.4 Power

The PMA7000M-S-Series 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 must be a twisted #18 AWG pair. Connect
airframe power ground to J1 (bottom connector) Pin Z only. No dropping resistors are
required.

2.4.5 External 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 PMA7000M-S is in
the FAIL-SAFE 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).

2.4.6 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 "Swap" Mode

When a momentary, normally open, push-button switch is connected between pin 10 on
the top 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.

2.4.8 Backlighting

The PMA7000M-S has an automatic dimming of the pushbutton annunciator LEDs and
marker lamps controlled by a photocell. Control of the unit backlighting is through the air-

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PMA7000M-S Series Audio Selector Panel and Intercom System

PS Engineering

Installation and Operator’s Manual

craft avionics dimmer. Connect the dimmer control line to J1 pin D for 14 volt systems,
and to J1 pin F for 28 volt systems. Pin E is light ground.

If an external dimmer control is not used, a constant low level back light illumination can
be established for nighttime viewing. Pin D or F (depending on system voltage) must be
tied to power (J1, pin 20) 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.

2.4.9 Unswitched inputs

J1, pin T is the unswitched input number 1 and J1 pin 17 is unswitched input 2. These in­puts are presented to the pilot and copilot regardless of the audio configuration, and will
always mute the entertainment inputs. These 510Ù inputs can be used for altimeter DH
audio, GPS waypoint audio, autopilot disconnect tones, air-to-ground (Flitefone) tele­phone ringer or any other critical audio signal. This input is not related to the cellular tele­phone interface.

2.4.10 Intercom wiring

The top connector (J2) is for the intercom and additional functions. See Appendix 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 3­conductor. MIL-spec cable as shown. Connect the shields at the audio panel end only, and
tie to the audio low inputs as shown.

NOTE: The top connector harness can be custom made by PS Engineering, Inc. Simply
call the factory and obtain a wire harness work-sheet. The harness will be made to your
specifications and fully functionally tested. All hardware is included.

2.4.10.1 Entertainment Input

NOTE: Use the low level output of any entertainment device to connect to
the audio panel. Maximum signal level is 1 VAC p-p.

DO NOT use a speaker-level output, this will cause internal damage in the
audio panel

2.4.10.1.1 Stereo entertainment (7000S, 7000MS)

Two stereo entertainment devices (CD player, cassette player, etc.) can be connected to
the unit. Install two 1/8-inch stereo jacks in a convenient location so that the pilot can plug
in the entertainment devices into the system. The audio signal at the entertainment input
must be a minimum of 500 mV P-P per channel for optimum music performance.

All entertainment devices must be switched off for both takeoff and landing.

2.4.10.1.2 Entertainment distribution

Entertainment source #1 provides music for the pilot and copilot positions, while enter­tainment source #2 provides music for the four passenger positions. The PMA7000M-S-

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system incorporates a "Soft Mute" system. This will mute the entertainment devices dur­ing ICS or radio conversation.

Any signal appearing in the unswitched audio inputs will always mute the entertainment
sources, even though the passengers may not hear the audio tone itself.

Entertainment inputs #1 and #2 can be paralleled so a single entertainment source can
serve both the passengers and the crew. It is suggested however, that a switch (DPDT) is
installed between the single entertainment device and entertainment input #1. This will al­low the pilot and copilot to decide if they hear entertainment while in the Crew mode.

Caution: Local oscillators and internal signals from some 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 entertainment devices must be switched off for both takeoff and landing.

2.4.10.1.3 Entertainment 2 Mute (Pin V)

The ICS button on the PMA7000M-S controls the muting (“Karaoke mode”) of enter­tainment source #1.

Connecting J2 pin V to 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 lessor impor­tance.

2.4.11 Com 3 Audio

As installed in the standard configuration, the PMA7000M-S Com 3 audio is placed in the
audio when the mic selector switch is in the Com 3 position (fully CCW). Pushing the re­ceiver selector buttons can monitor Com 1 and Com 2 audio. If monitoring of Com 3 is
desired in the Com 1 or Com 2, connect Com 3 audio in parallel to the AUX input (J1, pin

11).

2.4.12 PA Mute (J1, Pin 18)

Pin 18 of J1 is a TTL logic output that is pulled low during PTT operation. This serves as
an input to external public address system to prevent feedback during transmissions.

2.4.13 VOX Override (J2, Pin U)

Connecting pin U of the PMA7000M-S of J2 to ground will force the IntelliVox™ open.
This can be hooked up as a hot mic switch which will place all microphones on the inter­com. This can also be connected through a momentary switch to serve as a VOX test
switch, if desired. Because the IntelliVox™ will close in the presence of a steady tone, this
pin is used in testing to defeat the IntelliVox™ software.

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2.4.14 IRS Installation (Option 1, and 2)

To install the IRS, a momentary push button switch is required. This switch can be located
any where in cockpit convenient to the pilot's reach. The switch must be connected to pin
19 of J2 of the PMA7000M-S.

2.4.15 Audio Message Installation (Option 1 and 2 only)

The audio message installation requires inputs from an external annunciator, such as an
Electronics International engine gage system. A falling edge (input pulled low) when ap­plied to the appropriate pin of the connector will cause the message to be played, repeat­ing every two seconds, until the acknowledge (“ACK”) button is pushed.

Install the “ACK” button in a location convenient to the pilot and copilot position. This
switch is a momentary SPST switch between J2 Pin W and ground.

The following table contains information regarding various inputs.

Function EGT or CHT Fuel

Flow or

Level

PMA7000 Pin Z 22 Y 21 X 20
Message Number 1 2 3 4 5 6
Option 1
Message Text “Check tem-

perature”

OPTION 2

Function

Message Text “Check tem-

perature”

“Check
fuel”

“Check
fuel”

Oil Pres-

sure or

tempera-

ture

“Check
oil”

“Check
oil”

Volt/
Amp

“Check
battery”

“Check
battery”

RPM Manifold

“Check en­gine speed”

Vista Map

System

“Check Vista
Map”

“Check boost”

CHT Cooling

“Shock Cool”

Pressure

Other combinations can be created at additional cost.
NOTE: PS Engineering can only provide input information at this time. Approval basis is

the responsibility of the installer. Contact PS Engineering for more information.

2.5 Marker Installation (PMA7000M-S)

The marker beacon receiver is an option included in the PMA7000M-S. Non-marker
(PMA7000S) units can provide audio interface with the external receiver (see section

2.5.4).

2.5.1 Middle Marker Sense

A Middle Marker sense output signal is available from the 7000M-S to flight control sys­tems. This function will not operate during the test mode. This output will go to +4.7
VDC (± 0.5 VDC) when a valid Middle Marker signal is received. This output is J1, pin 2.

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2.5.2 External Marker Lights (7000MS)

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 (+9 VDC ±1.5
VDC) when active. Maximum source current per lamp is 125 mA. Voltage varies with
photocell dimming.

2.5.3 Marker Antenna Installation

Refer to aircraft and antenna manufacturer's installation instructions, as well as AC43.13­2A (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.

2.5.4 Marker Input (7000, 7000S)

If using an external marker receiver, the audio input is J1, pin 21 (MKR. input).

2.6 Adjustments

The PMA7000M-S is factory adjusted to accommodate the typical requirements for most
aircraft configurations. There are five adjustments however, that will allow the installer to
tailor the specific functions.

Marker Gain
CW- Reduce

MKR Low Sense
CW Decrease Sens.

Front of Unit

Speaker Volume
CW-Increase

Marker Audio
CW Decrease Volume

Passenger Volume
CCW Increases

PMA 7000 adjustment holes

Not used

Figure 2-1- PMA7000M-S Adjustments

2.7 Communications Antenna Installation Notes

For best results while in Split Mode, it is suggested 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

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AC 43.13-2A, 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 PMA7000M-S in Split Mode.

2.8 Wireless telecommunications interface

The PMA7000M-S has interface capability with units such as the Trimble TrimConnect
3100 D. It is the user’s responsibility to determine the appropriate legal use of the
equiment, and provide the services.

Interface to the 3100 D is through the J1 (bottom) connector, pins 14 and N. Pin 14, la­beled cellphone ring, is connected to pin V of the 3100D J3 connector and pin N of J1 is
connected to pin W of the J3 connector. On the TrimConnect interface these are listed as
data/fax lines, but they are used for voice interface in this case.

Use a 2-conductor with shield cable, and connect the shield to Pin M of the 3100 D J3.
If interface is desired with another type of wireless telecommunications unit, the aircraft

owner can purchase an after-market interface cable. By Federal Communications Commis­sion (FCC) regulations, these can only be used on the ground in the United States.

Interface cables manufactured by AXCELL are available from Mobile Quest (800) 882­1288, [phone] phone, [phone] fax. The following is a partial list of avail­able interface cables:

ITEM NUMBER Compatible Phones

AXC AUD STI95 Audiovox Series 5
AXC MOT/FLIP Motorola TeleTAC, DPC 550, DPC65-, Lite Series, Profile Series
AXC MOT/ELITE Motorola Elite, M70, M75, SC-725
AXC MOT/3WATT Motorola Bag Phones, Mobiles
AXC NEC 100 NEC100 Series, 110, 120, 180, Sport
AXC NEC 700/800 NEC 700 & 800 Series
AXC OKI 900/910 OKI 900/910, AT&T 3730/3710
AXC FUJI/PCX OKI 1150/1145, AT&T 3760
AXC FUJI/PCX Fujitsu PCX
AXC MITS 4000/22X Mitsubishi 4000, DiamondTel 22X/20X/18X
AXC NEC 960
AXC NEC DT2000 NEC DT2000 Digital Phone

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

which may include a $10,000 fine per incident. PS Engineering, Inc. does not endorse using unap-

proved cellular telephone equipment in flight, and takes no responsibility for the user’s action.

2.8.1 Hook Switches

While the mic selector acts as the hook switch for the pilot, additional hook switches must
be installed to have full access to the cellphone system. The copilot hook switch is a SPST
switch that connects pin L of J2 on the PMA7000M-S to ground to place the copilot on
the cellphone.

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PMA7000M-S J2, pin M is the passenger hook switch. Install a SPST switch in a location
adjacent to each passenger headset where cellphone use is desired. When pin M is con­nected to ground through any switch, the passenger microphones are all on the cellphone
system.

The wireless communication “tel” system utilizes an intercom loop. Therefore, any time
the cellphone is in use from the pilot or copilot side, pilot and copilot will lose intercom
capability. In the ALL mode, when the passengers’ activate the cell phone, the pilots will
have intercom, and continue to hear and transmit over the avionics normally. However the
passengers will not have intercom, because they are on the telephone.

To prevent unwanted distractions, only the pilot and copilot will hear an incoming call ring
signal. They can then decide to allow a passenger to activate the hook switch and use the
telephone.

If the pilot has selected “TEL” mode, the passengers cannot access the telephone in the
“CREW” intercom mode, but they will hear the call.

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2.9 PMA7000M-S Pin assignments

J1 Bottom Connector (Mono & Stereo)

Chassis Ground

MKR Coax Lo

MM Sense Output

MKR Antenna

Pilot Headphones

White Lamp Output

Amber Lamp Out

14 V Light Hi

Blue Lamp Out

Light Lo

DME Audio Hi

28V Lights Hi

Com 2 Mic Audio Out

Pilot Mic Audio Hi In

Com 3 Audio Hi

Com 1 Audio Hi

Com 3 Mic Audio Hi

Com 2 Audio Hi

Com 1 Spkr Load

AUX Audio Input Hi

Com 2 SPKR Load

Nav 1 Audio Hi

Cellphone tip

Nav 2 Audio Hi

Com 1 Mic Audio Hi

Cellphone ring

Com 1 Mic Key
Com 3 Mic Key

ADF Audio Hi

Com 2 SPKR load
Unswitched Audio In #1
Unswitched Audio in #2

PA Mute

Com 2 Mic Key

Com 1 SPKR load

Cabin Spkr Out

Aircraft Power 11-33 VDC

Ext. Marker Audio In

Pilot Mic Key

Cabin Spkr Lo

Aircraft Ground

1
A
2
B
3
C
4
D
5
E
6
F
7
H
8
J
9
K
10
L
11
M
12
N
13
P
14
R
15
S
16
T
17
U
18
V
19
W
20
X
21
Y
22
Z

J2 PMA7000S, 7000MS (Stereo) Top Connector

1

Pilot Phone Audio Hi (Left)

A
2
B
3
C
4
D
5
E
6
F
7
H
8

Copilot Phone Audio (Lt)
Copilot Phone Audio Lo
Copilot Phone Audio (Rt)

Pass 1 Mic Audio Hi
Pass 1 Mic Audio Lo

Pass 2 Mic Audio Hi
Pass 2 Mic Audio Lo
Pass 3 Mic Audio Hi
Pass 3 Mic Audio Lo
Pass 4 Mic Audio Hi
Pass 4 Mic Audio Lo
Copilot Mic Audio Hi

J
9
K
10
L
11
M
12
N
13

Copilot Mic Key
Copilot Mic Audio Lo
Swap Switch

Copilot Cellphone Off Hook
Passenger Headphone Audio (R)

Pass Cellphone Off Hook

Passenger Audio (L)
Passenger Headphone Audio Lo

Entertainment #2 in (R)

P
14
R
15
S
16
T
17
U

Entertainment #2 In (L)

Ent. # 2 Low
Entertainment #1 In (R)

Entertainment #1 Input (L)
Ent. #1 Input Lo

Ground
Hot Mic Mode (VOX O'ride)

18
V
19
W
20
X
21
Y
22
Z

Input
Output

Mute 2
Playback
Message Acknowledge
Message 6 Play
Message 5 Play
Message 4 Play
Message 3 Play
Message 2 Play
Message 1 Play

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2.10 Post Installation Checkout

After wiring is complete, verify power is ONLY on pin 20 of the J1 (bottom connector),
and airframe ground on bottom connector pin Z. Failure to do so will cause serious inter­nal damage and void PS Engineering's warranty.

2.11 Unit Installation

To install the PMA7000M-S, gently slide the unit into the mounting rack until the hold­down screw is engaged. While applying gentle pressure to the face of the unit, tighten the
3/32" hex-head in the canter of the unit until it is secure. DO NOT OVER TIGHTEN.

Warning: Do not over-tighten the lock down screw while installing the

unit in tray. Internal damage will result.

2.11.1 Operational Checkout

1. Apply power to the aircraft and avionics. Switch on the unit by pressing the volume

knob.

2. Plug headsets into the pilot, copilot, and occupied passenger positions.

3. Rotate the Mic Selector Switch to the Com 1 position.

4. Verify that the Com 1 button lights. Verify that the green transmit LED (Light Emit-

ting Diode) near the mic selector is not illuminated. If the LED is on, stop testing and
troubleshoot the microphone PTT installation.

5. Verify proper transmit and receive operation from the copilot position, noting that the

copilot PTT switch allows proper transmission on the selected transceiver.

6. 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.

7. Repeat for Com 2 and Com 3, (if installed).

8. Rotate the mic selector switch to the COM 1/2 position. Verify that the pilot commu-

nicates on Com 1 and the copilot on Com 2.

9. Rotate the mic selector switch to the COM 2/1 position. Verify that the pilot commu-

nicates on Com 2 and the copilot on Com 1.

10. Rotate the mic selector switch to the TEL position. 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 Com 1. The copilot has no transmit capability in
TEL mode.

11. Verify proper operation of all receiver sources by selecting them using the button.

Note that the button for the receiver sources stays in, and the button illuminates to
show which source is in use.

12. Push in the SPR button. Verify that all selected audio is heard in the cockpit speaker.

Verify that the audio mutes when the mic is keyed.

13. Verify that the LED in the lower right side illuminates when either push to talk is

keyed.

14. Verify proper Intercom system operation in the ALL, ISO and CREW modes (see Table

3-1).

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15. 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.

2.11.1.1 Marker Checkout (7000M-S only)

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 µV, 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 (M) push-button has been depressed. Select SPR for
speaker to verify marker audio availability on the cabin speaker. Verify that the white
(A) 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 µVolts applied.

3. Connect the marker antenna and verify proper operation.

2.11.2 Receiver Sensitivity

Although the PMA7000M meets FAA TSO-C35d sensitivity specifications, the sensitivity
of the receiver has been adjusted to meet real world requirements (150µV and 430µV,
soft). This will usually eliminate the need for the avionics shop to reduce the sensitivity in
the field so as to prevent early detection of the marker beacons. If your particular installa­tion requires more or less sensitivity, see adjustment section 2.6, and figure 2-1.

2.12 Cellular Interface Checkout

When a wireless telecommunication system is installed and configured, a dial tone will ap­pear in the headset of the pilot when the mic selector is in the “Tel” position. In “ALL”
intercom mode, a dial tone will be heard whenever the copilot or passenger’s hook switch
is closed.

2.13 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 at least five incoming radio transmis­sions.

This audio should only appear in the pilot’s headset, and only be incoming transmissions
from the transceiver selected in the mic select switch.

Depress the panel or yoke mounted playback switch, and verify that all five messages play,
in the order received.

Repeat for COM 2, and COM 3 (if installed).

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2.14 Digital Annunciation Checkout

If interfaced with an annunciation system, verify that all alert messages play at the appro­priate time, and that they are silenced by the “ACK” button.

2.15 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.

Complete log book entry, FAA Form 337, weight and balance computation and other
documentation as required. Sample text for FAA Form 337, and instructions for continu­ing airworthiness can be found in Appendix F.

Return completed warranty registration application to PS Engineering.

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3 Section III OPERATION

GENERAL INFORMATION

3.1 SCOPE

This section provides detailed operating instructions for the PS Engineering PMA7000M­S, and PMA7000S Audio Selector Panel/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 four sections covering the basic operating areas of the
PMA7000M-S systems. They are Audio Selector, Transceiver Selection, Intercom, and
Marker Beacon Receiver (7000M-S only).

Marker Indicator Lamps

O

M

I

V
o
l
u
m
e

Push
(Fail-Safe)

Marker Mode Selector

High

Low

Com 1 Nav 1

Test

Iso

All
Crew

ENGINEERING
INCORPORATED

Mounting
Screw

Nav 2Com 2

Crew ICS/
Music 1 Mute

Receive Audio Selectors

Photo
Detector

MKR ADF

R

Speaker Switch

AUXICS

PMA7000M-S

DME

SPR

Com 1 Com 1/2

Com 2

Com 3

Transmit Swap

Mic Selector

Com 2/1

Tel

TX Indicator

Intercom Mode Sel.

Swap Indicator

Intercom Vol.

Figure 3-1 PMA7000M-S controls

3.2 Audio Selector (All models)

Receiver audio is selected through two momentary and six latched, push-button, backlit
switches. Com 1 and Com 2 are the momentary switches.

Because the rotary microphone selector switch controls what transceiver is being heard,
the Com l and Com 2 push-buttons are of the momentary type and do not remain in when
selected. This is also part of the "auto” function. You will always hear the audio from the
transceiver that is selected for transmit by the rotary mic selector switch.

The users can identify which receivers are selected by noting which of the green switch
LEDs are illuminated. Push buttons labeled Nav 1, Nav 2, DME, MKR (Marker), ADF,
AUX (auxiliary), and SPR (Speaker) are "latched" type switches. When one of these but-

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tons is pressed, it will stay in the "in" position. Press the switch again and it be in the "out"
position and remove that receiver from the audio.

3.2.1 Speaker Amplifier

The "SPR" in the push-button section stands for speaker. This switch will place all se­lected audio on the cockpit speaker when this switch is selected. NOTE: The speaker am­plifier is not active in the "Split Mode."

3.3 Power Switch (Fail Safe Operation)

Unit power is turned on and off by pushing the volume knob. In the OFF or "FAIL-SAFE"
position, the pilot is connected directly to Com 1. This allows communication capability
regardless of unit condition. Any time power is removed or turned OFF, the audio selector
will be placed in the fail-safe mode.

The power switch also controls the audio selector panel functions, intercom, and marker
beacon receiver, (PMA7000M-S only). Unless the mic selector is in Com 3 mode, at least
one of the selected audio LEDs will be on (Com 1 or Com 2).

3.4 Microphone Selector

When the mic selector switch is in the Com 1 position, both pilot and copilot will be con­nected to the Com l transceiver. Only the person who presses their Push To Talk (PTT),
will be heard over the aircraft radio. Turning the rotary switch to the COM 2 position will
place pilot and copilot on Com 2.

The PMA7000M-S gives priority to the pilot’s PTT. If the copilot it transmitting, and the
pilot presses his PTT, the pilot’s microphone will be heard over the selected com trans­mitter.

Turning the mic selector fully counterclockwise places the pilot and copilot on Com 3.
Com 3 receive audio is automatically placed in the headset (and speaker if selected). Com
1 and/or Com 2 receiver audio can be selected to monitor those transceivers.

The PMA7000M-S-Series has an automatic selector mode. Audio from the selected trans­ceiver is automatically heard in the headsets and speaker. You can check this function by
switching from COM 1 to COM 2 and watch the selected audio light on the selector change
from COM 1 to COM 2. This ensures the pilot will always hear the audio from the trans­ceiver he is transmitting on.

When switching the mic selector rotary switch from COM 1 to COM 2, while COM 2 audio
had been selected, Com 1 audio will continue to be heard. This eliminates the pilot having
to switch Com 1 audio back on, if desired.

When switching from COM 1 to COM 2 while Com 2 has NOT been selected, Com 1 audio
will be switched off. In essence, switching the mic selector will not effect the selection of
Com audio.

The “TEL” position, fully CW on the mic selector switch, is the pilot’s “hook” switch,
when the system is interfaced to an appropriate approved wireless telecommunication

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system, such as the Trimble 3100 D. Placing the mic selector in TEL placed the pilot mi­crophone and headphones on the cellphone. The pilot PTT will switch the pilot mic to the
COM 1, and allow continued aircraft communications as well.

NOTE: Placing the mic selector switch in the TEL position will disable pilot and copilot
intercom, as the intercom circuit is transferred to the telephone use. In crew or ISO mode,
placing the switch in TEL mode removes the passengers access to the telephone.

3.4.1 Swap Mode (Switch from Com 1 to Com 2 remotely)

With a yoke mounted, momentary switch, the pilot can change from the current Com
transceiver to the other by depressing this switch. When "Swap Mode" is active, an an­nunciator in the lower right corner of the unit will illuminate, indicating that the Mic Se­lector switch position is no longer current. To cancel "Swap Mode," the pilot may either
press the yoke mounted switch again, or turn the Mic Selector Switch to the Com that is
active.

3.5 Split Mode

Turning the rotary switch to COM 1/COM 2 places the PMA7000M-S into "Split Mode."
This places the pilot on Com 1 and the copilot on Com 2. An example of this useful fea­ture is when the pilot may want to talk to Air Traffic Control, while the copilot may be
speaking to Flight Watch. Although this mode has limitations (see below) we believe you
will find this to be a useful feature.

Switching to Com 2/Com l will reverse the “Split Mode” radio selection. The pilot will be
on Com 2 and the copilot will be on Com 1.

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.

Note: Split Mode does not turn off other (Nav, ADF, etc.) selected audio to pilot. However, the

copilot will only hear the selected communications receiver.

3.5.1 Split Mode ICS

In split mode, the pilot and copilot are usually isolated from each other on the intercom,
simultaneously using their respective radios. Depressing the ICS button in Split Mode will
activate VOX intercom between the pilot and copilot positions. This permits intercommu­nication when desired between the crew. Pressing the ICS button again disables this crew
intercom function.

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3.6 Intercom

3.6.1 IntelliVox™ VOX-Squelch

No adjustment of the IntelliVox™ squelch control is necessary. 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 best performance, the headset microphone must be placed within ¼ inch of your lips,
preferably against them. 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.

For optimum microphone performance, PS Engineering, Inc. 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.

Table 3-1 Mic Muff ™ Part Numbers

Manufacturer Model Mic Muff™ Part

Bose Dynamic

Electret
M87 Dynamic

David Clark H10-30

H10-20, H10-40
H10-13.4

Lightspeed 15K & 20K 90015

Peltor 7003

7004

Pilot 11-20 & 11-90 90015

Sennheiser 90015

Telex Airman 750

AIR3000

3.6.2 Volume Control

Number

90010
90015
90020
90010
90015
90015

90010
90015

90015
90010

The volume control knob adjusts the loudness of the intercom for the pilot and copilot
only. It has no effect on selected radio levels, music input levels or passengers' volume
level.

Adjust the radios and intercom volume for a comfortable listening level for the pilot. Most
general aviation headsets today have built-in volume controls; therefore, passenger volume

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can be adjusted at the headset. If desired, passenger volume level can be adjusted by a
screwdriver adjustment at the top of the tray (see figure 2-1).

3.6.2.1 Mono headsets in Stereo Installation

All passenger headsets are connected in parallel. Therefore, if a monaural headset is
plugged in to a PMA7000M-S Stereo installation, one channel will be shorted. Although
no damage to the unit will occur, all passengers will lose one channel. PS Engineering
modifies headsets to add stereo capability, using high-fidelity speakers. Contact factory for
details.

3.6.3 Intercom Modes

The lower switch on the left side is a 3-position mode switch that allows the pilot to tailor
the intercom function to best meet the current cockpit situation. 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 ICS button.

ISO: (Up Position): 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’ intercom and Entertainment 1, while passen­gers will hear copilot intercom and Entertainment 2. Neither will hear aircraft radio recep­tions or pilot transmissions.

ALL: (Middle Position): All parties will hear the aircraft radio and intercom. Crew will
hear Entertainment 1, passengers will hear Entertainment 2. 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 (Down Position): 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
also may listen to Entertainment 2.

Anytime the PMA7000M-S is in either the COM 1/COM 2, COM 2/COM 1, ("Split Mode"),
the pilot and copilot intercom is controlled with the ICS button. The passengers will
maintain intercommunications, but never hear aircraft radios.

3.6.3.1 Entertainment Input

The audio selector panel has provisions for two separate entertainment input devices.
They operate independently in the PMA7000M-S. The volume control does not affect mu­sic level.

While in the ISO (Isolate) mode, the copilot will hear Entertainment 1 while the four pas­sengers will hear Entertainment #2. The pilot will hear entertainment 1, at a muted level.
In normal operation, whenever a person speaks, or if the aircraft radio becomes active, the
music will automatically mute and then will gradually return to the original listening level
when the intercom or radio conversation ceases.

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When in the ALL mode, pilot and copilot will hear Entertainment 1 input while all passen­gers will hear the Entertainment 2 source. While in the CREW mode, pilot and copilot will
hear entertainment input #1 while the passengers may listen to entertainment input #2.

It is also possible to use only one entertainment input device for both entertainment inputs.
It is suggested however, that a switch (DPDT) is installed between the single entertain­ment device and entertainment input #1. This will allow the pilot and copilot decide if they
hear entertainment while in the Crew mode.

3.6.3.2 Soft Mute and Soft Mute inhibit

The Soft Mute feature assures that the aircraft radio transmissions will not be missed due
to entertainment playing. When there is radio reception or intercom conversation, the mu­sic level is dropped to a low, or background level. When the radio or intercom traffic
ceases, the level gradually returns to normal.

The front panel ICS switch controls muting of entertainment source #1. Pushing this but­ton places the ICS in Karaoke (or sing along) mode, which inhibits the soft mute feature.
This allows the music to continue uninterrupted by intercom or radio traffic when cockpit
workload is appropriate. Pushing the button again will release the mute inhibit function.

The passenger music, source #2, can be placed in the Karaoke mode if a remote switch is
installed in the aircraft. See wiring information for details.

Table 3-2 Intercom Modes

Mode Pilot Hears Copilot Hears Passenger Hears Telephone Comments
Isolate A/C Radios

Pilot Sidetone
(during radio transmis­sion)
Entertainment 1 is
Muted

All Pilot

Copilot
A/C Radio
Passengers
Entertainment #1

Crew Pilot

Copilot
A/C Radio
Entertainment #1

Copilot and passenger
intercom
Entertainment #1

Copilot
Pilot
A/C Radio
Passengers
Entertainment #1

Copilot
Pilot
A/C Radio
Entertainment #1

Passenger and Copilot
intercom
Entertainment #2

Passengers
Pilot
Copilot
A/C Radio
Entertainment #2

Passengers
Entertainment #2

“Phone Booth” mode
Pilot has exclusive use of the
telephone.
In TEL, Pilot connected to
Com 1 for PTT TX and re­ceive. Others hear Tel if off
hook.
All have access to phone
through Hook Switch. Pilot
access through TEL switch.
All hear telephone audio if off
hook.

Pilot and copilot don’t have
phone access, unless mic sel
in TEL. Passengers have
phone through Hook Switch,
Passengers hear phone
audio.

This mode allows the pilot
to communicate without
the others bothered by the
conversations. Copilot and
passengers can continue
to communicate and listen
to music
This mode allows all on
board to hear radio recep­tion as well as communi­cate on the intercom.
Music and intercom is
muted during intercom
and radio communications
This mode allows the pilot
and copilot to concentrate
on flying, while the pas­sengers can communicate
amongst themselves.

3.7 Telephone Mode

Each intercom position has a "hook switch." The pilot's hook switch is the "TEL" mode
on the audio panel, the others are discrete switches mounted adjacent to the headset jacks.

When the intercom is in ALL mode, the pilot can speak on the phone only if the mic se­lector switch is in TEL position. All intercom positions will hear the telephone conversa­tion. Anyone who places his or her switch into the “off-hook” position will also be heard

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on the phone. All will hear selected audio. Com 1 audio is automatically heard in the head­sets. The pilot will have transmit capability on Com 1, simply by using the PTT switch.

In CREW mode, the pilot and copilot are may use the telephone, with their respective
hook switch (the pilot selects TEL on the mic selector). Any passenger who places their
switch into the off-hook position will also have access to the phone, and all four passen­gers will hear the conversation.

In ISO intercom mode, when the PMA7000M-S 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, and will transmit on that radio using the PTT. All selected
audio is provided. If any other passenger goes “off hook” they will hear the phone.

In all cases, only the pilot (and copilot in ALL or CREW) will hear the cellphone ring. At
that time they can chose to allow a passenger to take the call, or answer the phone.

Note: Because the cellphone uses an intercom circuit, all stations on that cir-

cuit will lose intercom capability when the cellphone is in use.

3.8 Marker Beacon (PMA7000M-S)

The optional 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" push­button switch. To adjust the volume level, there is a service adjustment located on the top
of the unit. See Section 2.5

A three position switch is used to set the receiver sensitivity and to test the indicator
lamps. Use "HIGH" sensitivity initially. This allows you to hear the outer marker beacon
about a mile out. Then select the “LOW” sensitivity to give you a more accurate location
of the Outer Marker. The momentary down switch position is labeled "TEST" and illumi­nates all three lamps simultaneously to assure the lamps(internal and external) are in
working order. TST does not activate MM sense ouput.

3.9 Internal Recorder System (Option 1 and 2 only)

The Intercom Recording System (referred to here as the IRS) is a digital recording system
allowing automatic storage and immediate playback of all incoming aircraft radio recep­tions.

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Operating as a continuous loop recorder, (first message received will be the last heard),
the recorder has one minute of recording time and up to 16 messages. With its own built
in VOX circuit, there are no buttons to press to start recording. The system automatically
begins to record the instant the radio becomes active. Only aircraft radio audio in pilots
headset is recorded and only the pilot will hear the playback audio.

3.9.1 Operation

Recording is automatic; there is no action required by the pilot. To play back the last re­corded message, simply press the momentary switch associated with the IRS. Each addi­tional press of the button will play the preceding recorded message.

3.9.1.1 Audio Messaging system (Option 1, Option 2, only)

When this option is installed, the PMS7000M-S contains six stored messages. An outside
annunciator, such as an Electronics International engine gage system triggers these mes­sages. When there is an announcement, it will be repeated every two seconds until the re­mote- mounted ACK button is pushed. This stops the played annunciation, until the next
announcement is required (the next falling edge).

3.9.1.2 Concurrent Messages

When a recorded message or audio annunciation is playing, the other audio source is mo­mentarily inhibited. For instance, if an IRS message is being played, the audio annunciation
will not begin until the IRS message is finished. Conversely, the IRS recording cannot be
played as long as there is an aural alert being played. There is no recording made if playing
a recording or annuncuation.

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4 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- certified avionics shop and authorized PS Engineering dealer.
An FAA Form 337 must also be accompanied by the warranty card for this warranty to be
in effect. If the unit is being installed by in an experimental aircraft, a factory- or dealer
made harness must be installed 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 one year from the date of installation. During this one-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. Shipping charges to return the defective unit are the responsibility of the cus­tomer.

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 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.

4.2 Factory Service

The unit is covered by a one-year limited warranty. See warranty information. Call PS En­gineering, Inc. at [phone] before you return the 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
[phone] FAX [phone]

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Installation and Operator’s Manual

5 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 configurations that can be used, 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 PS Engineering or 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

200-070-0006 Appendix A Rev. 6, Nov 98

PMA7000M-S Series Audio Selector Panel and Intercom System

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Installation and Operator’s Manual

6 Appendix B – Installation Drawing

0.60 in (15.25 mm)

0.35 in
(8.9 mm)

Cutout size for front mount installation

6.31in (160.3 mm)

6.65 in (167 mm)
Side View

CG

3.00 in (76.2 mm)

5.25 in
(133.4 mm)

6.28 in
(159.5 mm)

1.62 in
(41.15 mm)

1.31 in
(33.27 mm)

0.8 in
(20.3 mm)

Rear View

Weight: 1.5 lb with tray and connectors ( .68 kg)

Connector viewed from the rear

Z Y X W V U T S R P N M L K J H F E D C B

22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2A1

Z Y X W V U T S R P N M L K J H F E D C B

22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2A1

J2 (top)

J1 (bottom)

200-070-0006 Appendix B Rev. 6, Nov 98

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7 Appendix C Bottom Connector Interconnect

Communications
Transceiver #1

Com 1 SPR Load

Communications
Transceiver #2

Com 2 SPR Load

Communications
Transceiver #3

Note 10

Trimble

VHF Nav 1

VHF Nav 2

Ext. Mkr Audio

ADF Receiver

DME Receiver

AUX Audio

J3

V
W
M

3100 D

Com 1 Audio Hi

Com 1 Lo

Com 1 Mic Audio Hi

Com 1 Mic Key

Com 1 Spr Load
Com 1 Spr Load

See Note 8

Com 2 Audio Hi

Com 2 Lo

Com 2 Mic Audio Hi

Com 2 Mic Key

Com 2 Spr Load
Com 2 Spr Load

Com 3 Audio Hi

Com 3 Lo

Com 3 Mic Audio Hi

Com 3 Mic Key

Cellphone Ring

Cellphone Tip

Nav 1 Audio Hi
NAV 1 Audio Lo

Nav 2 Audio Hi

Nav 2 Audio Lo

Mkr Audio In Hi

Mkr Audio In Lo

ADF Audio Hi
ADF Audio Lo

DME Audio Hi

DME Audio Lo

AUX Audio Hi
AUX Audio Lo

9

Bottom Connector, J1

P
R

19
L

10
H

V
16
M
J

K
15

14
N

12

13

21

S

6

11

Notes:

1. Pins 7, U, and X not used.

2. All shields should be grounded at audio panel only.
other end remains floating.

3. Speaker and Pilot Headphone ground returns
MUST be kept separate and connected
to pin 22.

4. All Power and Ground wires must be #18 gage wire

5. Pilot mic and headphone jacks must be isolated from ground.

6. Pin 20 connected through a 3 A breaker.

7. PA Mute is a TTL level logic output
that is pulled low when PTT active.

8. Speaker loads may be reqired on some
transceivers. Consult manufacturer's information.

9. 28V installations require a 3 A breaker.
Retrfit 28V installations may remove dropping
resistor and change breaker to 3A.

10. Interface information shown for Trimble 3100 phone only.
Ground shield at J3 only.

11. All shielded wires must be MIL 22750 or 27500.

12. For mono versions (PMA7000, PMA7000M) connect pilot headphone
as shown with 2-conductor wire.
For stereo versions (PMA7000S and PMA7000M-S) connect
pilot headphone (L) to top connector, Pin 1, using 3-conductor wire.

13. Key pin between pin 4 and 5.

Pilot PTT

See Note 3

MKR Ant.

Unswitched Audio #1

Unswitched Audio #2

Ext. Marker Lamp (White)

Ext. Marker Lamp (Blue)

Ext. Marker Lamp (Amber)

Ext. Marker Annunciator

MM Sense Output

11-33 VDC

Pilot Phones (R)
Pilot Phones (L)

Pilot Phones Lo

Speaker Hi
Speaker Lo

RG-58A/U Coax

See Note 7

PA Mute Trigger

2A (14VDC)
3A (28VDC)

See Note 4, 9

Unswitched Input #1 Hi

Unswitched Audio Lo

Unswitched Input #2 Hi

Unswitched Audio Lo

Pilot Mic Audio Hi

Pilot Mic PTT

Pilot Mic Lo

White Lamp Output

Blue Lamp Output

Amber Lamp

MM Sense

28 Volt Lights Hi

14 V Lights Hi

Lights Lo

See Note 4, 9

Ground

Airframe Ground

T

17

8
Y

3

W
22

C
5
4
2

B
A
F
D
E

18
20
1

Z

To Pin 1
Top Conn.

See Note 12

DWN
DATE

CKD
DATE

06/30/98

APR

DATE

07/01/98

GLP

06/30/98

CAJ

GLP

9800 MARTEL ROAD, LENOIR CITY TN 37922

TITLE:

PMA7000 Bottom Connector Wiring

DOCUMENT NUMBER:SIZE

120-070-0201 3

A

DATE:

07/01/98

SHEET OF

1

REV

1

200-070-0001 Appendix C Rev. 1, July 98

PMA7000M-S Series Audio Selector Panel and Intercom System

PS Engineering

Installation and Operator’s Manual

8 Appendix D Top Connector Interconnect

PMA7000M-S J2 TOP CONNECTOR (Stereo)

1

3
2
B

Pilot Phones (L) -see bottom connector.

Copilot Phones (R)

Copilot Phones (L)
Copilot Phones Lo

Notes:

11
12
N

4
D

5
E

6
F

7
H

16
15
T

14
13
R

10

Pass. Phones (R)

Pass Phones (L)
Pass. Phones Lo

Pass. Mic Hi

Pass. Mic Lo

Pass. Mic Hi

Pass. Mic Lo

Pass. 1 PhonesJack

Pass. 1 Mic Jack

Pass. 2 Phones Jack

Notes 2, 4

Pass. Mic Hi

Pass. Mic Lo

Pass. Mic Hi

Pass. Mic Lo

8
9
K

Copilot Mic Audio

Copilot Copilot PTT

Copilot Mic Lo

Ent. #1 Audio (L)
Ent. #1 Audio (R)
Ent. #1 Audio Lo

Ent. #2 Audio (L)

Ent. #2 Audio (R)

Ent. #2 Audio Lo

Swap

Copilot Mic Jack

Ent. #1 Input

Ent. #2 Input

Pass. 3 Phones Jack

Pass. 4 Phones Jack

L
U

V

Ent. #2 Mute

Copilot hook switch

VOX Override

Note 7

M

Passenger Hook Switches

19

W

20
X
21
Y
22
Z

Playback

Acknowledge

Message 6 Activate
Message 5 Activate
Message 4 Activate
Message 3 Activate
Message 2 Activate
Message 1 Activate

Note 3

9800 MARTEL ROAD, LENOIR CITY TN 37922

TITLE:

PMA7000 Top Connector Wiring (Stereo)

DOCUMENT NUMBER:

SIZE

DATE:

A

07/01/98

120-070-0401 3

SHEET OF

REV

1

1

200-070-0006 Appendix E Rev. 6, Nov 98

PMA7000M-S Series Audio Selector Panel and Intercom System

PS Engineering

Installation and Operator’s Manual

9 Appendix E- Instructions for FAA Form 337 and continuing
airworthiness

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

PMA7000M-S, you may use the following text as a guide.

Installed audio selector and 6-place intercom, PS Engineering PMA7000M-S, part
number 7000 (X) 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 200-070-0003, revision 2, dated July 23,

1998.
This unit is FAA-Approved under TSO C50c for audio amplifiers, TSO C35d for

Marker Beacon Receivers, and meets appropriate environmental qualifications
outlined in RTCA DO-160B 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 __A circuit breaker (type and part num­ber), and total electrical load does not exceed % of the electrical system ca­pacity with the PMA7000M-S added.

Aircraft equipment list, weight and balance amended. Compass compensation
checked. A copy of the operation instructions, contained in PS Engineering docu­ment 200-070-0003, revision 2, July 23, 1998, is placed in the aircraft records. All
work accomplished listed on Work Order .

Instructions for continuing airworthiness, Audio Panels

The PMA7000M-S is considered an “on-condition” maintenance item. It is checked prior
to each flight during normal operation. There are no additional considerations for con­tinuing airworthiness other than the practices detailed in AC 43.13-1A, Chapter 15, Para­graph 750. This includes, inspecting the unit to be sure it is securely fastened in its loca­tion, and that the wiring harness is not chafed or pinched, and remains secure. All panel
jacks should be checked at each periodic inspection to ensure that they are tight and not in
contact with other items behind the instrument panel.

200-070-0003 Appendix F Rev. 3, Sept. 98

PMA7000M-S Series Audio Selector Panel and Intercom System

PS Engineering

Installation and Operator’s Manual

10 Appendix F RTCA DO160C Environmental Qualification Form

Audio Selector Panel/Intercom/Marker Beacon Receiver
Part Number: 7000S; 7000M-S
FAA TSO Number: C50c, C35b Class A
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

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 B
Audio Frequency Susceptibil­ity
Induced Frequency Suscepti­bility
Radio Frequency Susceptibility 20.0 Equipment tested to Category T
Radio Frequency Emission 21.0 Equipment tested to Category B
Lightning Induced Transient
Susceptibility
Lightning Direct Effects 23.0 Category X, not tested
Icing 24.0 Category X, not tested

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

-20° C Storage, -15°C Low Operating
+85°C Storage, +70°C High Operating
Not Applicable, no cooling required
50,000’ unpressurized
Not Applicable
Not Applicable

18.0 Equipment tested to Category B

19.0 Equipment tested to Category B

22.0 Equipment tested to Category K

200-070-0006 Appendix F Rev. 6, Nov 98