BENDIXKing AeroPanel 100 Guida utente

9201-B San Mateo Blvd NE

Albuquerque, New Mexico 87113

www.bendixking.com

AeroPanel 100

Document P/N 89000063-011

Rev. 0, April 2020

Audio Selector Panel with Marker Beacon Receiver

High-fidelity Stereo Intercom

System Installation and Operation Manual

FAA- TSO C50c, C35d, C71

EASA ETSO C50c, 2C35d

Patented under one or more of the following;

No. 4,941,187; 5,903,227; 6,160,496 and 6,493,450

BendixKing, Inc. 2020 ©

Any reproduction or retransmittal of this publication, or any portion thereof, without the expressed written permission of Ben-

dixKing is strictly prohibited. For further information contact the Publications Manager at 9201-B San Mateo Blvd NE

Albuquerque, New Mexico 87113.

Table of Contents 
 Section I –GENERAL INFORMATION...............................1-1 
1 INTRODUCTION............................................................................................................................1-1 
2 SCOPE ..............................................................................................................................................1-1 
3 EQUIPMENT DESCRIPTION.......................................................................................................1-1 
4 APPROVAL BASIS.........................................................................................................................1-2 
5 SPECIFICATIONS..........................................................................................................................1-2 
6 EQUIPMENT SUPPLIED...............................................................................................................1-4 
7 EQUIPMENT REQUIRED BUT NOT SUPPLIED......................................................................1-4 
8 LICENSE REQUIREMENTS.........................................................................................................1-4 
 Section II - INSTALLATION........................................2-1 
1 GENERAL INFORMATION..........................................................................................................2-1 
1.1 SCOPE..............................................................................................................................2-1 
1.2 CERTIFICATION REQUIREMENTS ......................................................................................2-1 
2 UNPACKING AND PRELIMINARY INSPECTION ..................................................................................2-1 
3 EQUIPMENT INSTALLATION PROCEDURES.......................................................................................2-1 
3.1 COOLING REQUIREMENTS ................................................................................................2-1 
3.2 MOUNTING REQUIREMENTS.............................................................................................2-1 
3.3 AUDIO PANEL MOUNTING RACK INSTALLATION.............................................................2-1 
3.4 AUDIO PANEL TRAY AND CONNECTOR ASSEMBLY .........................................................2-2 
4 CABLE HARNESS WIRING .................................................................................................................2-2 
4.1 ELECTRICAL NOISE...........................................................................................................2-2 
4.2 HEADPHONE WIRING........................................................................................................2-3 
4.3 POWER ..............................................................................................................................2-3 
4.4 AUDIO PANEL INTERFACE ................................................................................................2-3 
4.5 TRANSMIT INTERLOCK .....................................................................................................2-3 
4.6 BACKLIGHTING.................................................................................................................2-3 
4.7 UNSWITCHED INPUTS........................................................................................................2-3 
4.8 "SWAP"BUTTON FUNCTIONS ...........................................................................................2-4 
4.9 TEL (DUPLEX)FUNCTION FOR WIRED SATELLITE OR CELL PHONES ..............................2-4 
4.10 PUBLIC ADDRESS MODE.................................................................................................2-5 
4.11 PA MUTE (J2, PIN 12).....................................................................................................2-5 
4.12 MISCELLANEOUS LOGIC OUTPUT (J2, PIN 18) ...............................................................2-5 
5 INTERCOM WIRING............................................................................................................................2-5 
5.1 ENTERTAINMENT INPUTS..................................................................................................2-5 
5.2 MUSIC DISTRIBUTION (DISTR)........................................................................................2-5 
5.3 ENTERTAINMENT MUTING ................................................................................................2-6 
5.4 MUSIC CONFIGURATION...................................................................................................2-6 
5.5 DIGITAL RECORDER &PLAY BACK FEATURE..................................................................2-7 
5.6 MARKER ANTENNA INSTALLATION .................................................................................2-7 
5.7 EXTERNAL MARKER LIGHTS............................................................................................2-7 
5.8 MIDDLE MARKER SENSE..................................................................................................2-7 
6 ADJUSTMENTS ...................................................................................................................................2-7 
6.1 BACKLIGHT ADJUSTMENTS ..............................................................................................2-8 
7 COMMUNICATIONS ANTENNA INSTALLATION NOTES .....................................................................2-9 
8 AEROPANEL 100 PIN ASSIGNMENTS...............................................................................................2-10 
9 WIRING CHECKOUT........................................................................................................................2-10 
10 UNIT INSTALLATION......................................................................................................................2-11 
11 OPERATIONAL CHECKOUT ...........................................................................................................2-11 
11.1 REQUIRED TEST EQUIPMENT........................................................................................ 2-11 
11.2 AUDIO PANEL TEST ......................................................................................................2-11 
11.3 MARKER CHECKOUT ....................................................................................................2-12 

BendixKing

AeroPanel 100 Audio Selector Panel

Installation and Operator’s Manual

89000063-011 Page ii Rev. 0, April 2020

2.11.4 BLUETOOTH CHECKOUT...............................................................................................2-12

2.11.5 INTERNAL RECORDER CHECKOUT-PLAYBACK........................................................2-12

2.12 FINAL INSPECTION ........................................................................................................................2-12

Section III OPERATION............................................3-1

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

3.2 COMMUNICATIONS TRANSMIT (XMT) SELECTION (2)....................................................................3-1

3.3 AUDIO SELECTOR (4) ........................................................................................................................3-3

3.4 SPEAKER AMPLIFIER (5)...................................................................................................................3-3

3.4.1 PUBLIC ADDRESS FUNCTION ............................................................................................3-3

3.5 MARKER BEACON OPERATION (10).................................................................................................3-3

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

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

3.6.2 INTERCOM VOLUME CONTROL (7) ...................................................................................3-4

3.6.3 INTERCOM MODES (8) ......................................................................................................3-5

3.6.4 SPLIT MODE INTERCOM....................................................................................................3-5

3.6.5 ALTERNATE INTERCOM FUNCTION .....................................................................................3-5

3.7 MUSIC AND MUSIC MUTING (6)........................................................................................................3-5

3.7.1 MUSIC DISTRIBUTION (DISTR)........................................................................................3-6

3.7.2 MUSIC IN PILOT ISO MODE...............................................................................................3-7

3.8 BLUETOOTH®TELEPHONE MODE ...................................................................................................3-7

3.8.1 BLUETOOTH TELEPHONE USERS.......................................................................................3-7

3.8.2 CELLULAR TELEPHONE SIDETONE....................................................................................3-8

3.8.3 SCRATCHPAD MESSAGES ..................................................................................................3-8

3.8.4 RADIO PLAYBACK ............................................................................................................3-8

3.9 BLUETOOTH®INTERFACE ................................................................................................................3-8

3.9.1 PAIRING AND UN-PAIRING BLUETOOTH DEVICES.............................................................3-8

3.10 USB CHARGING PORT ....................................................................................................................3-9

3.11 BACKLIGHTING ...............................................................................................................................3-9

3.12 BLUETOOTH®STREAMER OUTPUT................................................................................................3-9

3.12.1 STREAMER PAIRING........................................................................................................ 3-9

3.12.2 STREAMER ON/OFF........................................................................................................3-10

3.12.3 STREAMER OUTPUT VOLUME.......................................................................................3-10

3.12.4 STREAMING SOURCE SELECTION .................................................................................3-10

Section IV –Warranty..............................................4-1

Appendix A –AeroPanel 100 Installation Drawings.................................................... A

Appendix B –J1 Connector Interconnect ..................................................................B

Appendix C –J2 Connector Interconnect................................................................. C

Appendix D–Instructions for FAA Form 337 and continuing airworthiness ........... D

6.1 INSTRUCTIONS FOR FAA FORM 337,AUDIO PANELS.........................................................................D

6.2 INSTRUCTIONS FOR CONTINUING AIRWORTHINESS,AUDIO SYSTEM................................................D

Appendix E –RTCA DO160D Environmental Qualification Form........................E

Rev

Date

Change

April 2020

Initial Release

BendixKing

AeroPanel 100 Audio Selector Panel

Installation and Operator’s Manual

89000063-011 Page 1-1 Rev. 0, April 2020

Section I – GENERAL INFORMATION

1.1 INTRODUCTION

The AeroPanel 100 represents another evolutionary step in cockpit audio control and intercommunications

utility. Using IntelliVox® design, front panel USB Charging port, and Bluetooth® streaming, this marks the

next level of audio control. The unit is designed for outstanding ergonomics and visually defined mode an-

nunciation 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 AeroPanel 100.

1.2 SCOPE

This manual provides detailed installation and operation instructions for the BendixKing AeroPanel 100, of

Audio Selector Panel/Intercom Systems. This includes the following units:

Model

Description

Part Number

AeroPanel 100

Stereo Audio Selector Panel with Marker Beacon, in-

cludes USB charging jack and Internal Recorder System,

a Bluetooth Streamer Bluetooth Audio output module,

.and Bluetooth Connectivity

BK 89000063-0001

PSE 050-890-5466

1.3 EQUIPMENT DESCRIPTION

The AeroPanel 100 is a state-of-the-art audio isolation amplifier and audio selector that contains an automatic

voice activated (VOX) intercom system and integral marker beacon receiver. It can switch two transceivers

(Com 1, Com 2) and four receivers; Nav 1, Nav 2, MKR and AUX (ADF & DME).

A full duplex TEL mode allows the AeroPanel 100 to act as an audio interface between aircraft headphone

and microphones and specific aircraft approved (FAA/FCC) cellular telephone equipment, through the Blue-

tooth connection.

Warning: Use of non-aviation approved cellular telephoneequipment may be prohibitedbyFCC regulation.

BendixKing is not responsible for unauthorized airborne use of cellular telephones.

For airborne use, the AeroPanel 100 must be interfaced with an approved system.

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

warning.

Pushbuttons select the receiver audio source provided to the headphones. A SPR button allows the user to

listen to the receiver(s) selected on the cabin speaker. Except for the unswitched inputs, all speaker audio is

muted during transmit. Unswitched inputs 1, 3, and 4 are always presented to the aircraft speaker. Unswitched

input 2 will be presented to the speaker when the front panel SPR push button has been selected.

Pushbutton switches select one of the communication transceivers for the pilot and copilot position, and allow

radio transmission. In "Split Mode" the AeroPanel 100 has the ability to allow the pilot to transmit on Com

1 while the copilot can transmit on Com 2. A fail-safe mode connects the pilot headphone and microphone

to COM 1 if power is removed for any reason, or if the power switch is placed in the Off (Fail-safe) position.

Unswitched input #1 is also provided to the pilot headphone in fail-safe

A six-station voice activated (VOX) intercom is included in the AeroPanel 100. This system has patented

IntelliVox® circuitry that eliminates manual adjustments. The intercom system incorporates pilot isolate, all

and crew modes, two independent stereo music inputs with "SoftMute™". Intercom volume control is

through two concentric front panel knobs and a pushbutton intercom mode switch. The small volume knob

controls the intercom level for the pilot and copilot, while the large knob controls the passenger intercom

volume. Intercom squelch is automatic.

BendixKing

AeroPanel 100 Audio Selector Panel

Installation and Operator’s Manual

89000063-011 Page 1-2 Rev. 0, April 2020

A 3-light, 75 MHz Marker Beacon receiver is integrated in the AeroPanel 100. This provides the necessary

Marker Beacon lights and audio indications necessary for that portion of an Instrument Landing System (ILS)

approach. A pushbutton labeled MKR allows the pilot select high or low sensitivity as well as test and mute

modes.

In the AeroPanel 100, a Bluetooth® wireless interface is available for wireless telephone and music connec-

tion.

1.4 APPROVAL BASIS

FAA TSO Approval

The AeroPanel 100-series Audio Selector Panels are FAA approved under TSO C50c (Audio Amplifiers)

TSO C35d (Marker Beacon Receivers) and TSO C71 (DC to DC Converters, ETSO C50c/ and 2C53d.

All systems comply with relevant portions of EUROCAE RTCA MPS WG No. 7/70, DO-143 and (Marker

Beacon Receivers), ED-14C/DO-160C (Environmental Conditions and Test Procedures for Airborne Equip-

ment), ED12B/DO-178B, Level D (Software Considerations for Airborne Equipment) and ED- 18/DO-214

(Audio Systems Characteristics and Minimum Operational Performance Standards for Aircraft Audio Sys-

tems).

Operation is subject to the following conditions:

This device may not cause harmful interference.

This device must accept any interference received, including interference that may cause undesired operation.

1.5 SPECIFICATIONS

TSO COMPLIANCE

Marker Beacon:

FAA TSO C35d, Class A ETSO 2C35d

Audio Selector/Intercom:

FAA TSO C50c, Class 1a ETSO C50c

USB Power Converter

FAA-TSO C71

APPLICABLE DOCUMENTS:

RTCA/DO-214 RTCA/DO-143 RTCA/DO-160D

RTCA/DO-178B DO-254

ENVIRONMENTAL Qualifications:

A1D1CABSMXXXXXXZBABATBXXE2XXX

Operating Temperature Range:

-15º C to 55ºC

Altitude:

Up to 50,000 feet in an non-pressurized area

DIMENSIONS:

Height: 1.3 in. (3.3 cm) Width: 6.25 in. (15.9 cm)

Depth behind panel 7.15 in. (18.16 cm)

WEIGHT

AeroPanel 100 Unit

Rack with connectors

1.34 lb. (0.61 kg)

0.51 lb. (0.24 kg)

POWER REQUIREMENTS (Including Internal Lighting):

Voltage:

11 to 33 VDC

Maximum Current:

2.5 Amp (Externally protected by a 5A pull-type

breaker)

USB Charging Port:

Voltage - +5VDC

Current - 2.0A (10W Maximum) output, short circuit

and over-current protected

BendixKing

AeroPanel 100 Audio Selector Panel

Installation and Operator’s Manual

89000063-011 Page 1-3 Rev. 0, April 2020

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:

8 (Com 1, Com 2, TEL, Nav 1, Nav 2, ADF, DME, AUX)

Unswitched Inputs:

Transmitter Selections:

4 (Com 1, Com 2, TEL

Com1/2)

Speaker Impedance:

4 

Headphone Impedance:

150 –1000 

Headphone Output:

38 mW each headset, no clipping <1% THD typical

Microphone Impedance:

150 - 600 

Bluetooth Radio

Class 3, FCC ID QOQWT32i

Intercom Specifications

Intercom Positions:

6 places (with individual IntelliVox® circuits)

Music Inputs:

2, (Independent, Stereo)

Music Muting:

>-30 dB "Soft Mute" when Com or intercom active.

Distortion:

<1% THD @ 38 mW into 150

Mic Freq. Response, 3 dB:

300 Hz - 6000 Hz

Music Freq. Response, 3 dB:

10 Hz –26 kHz

MARKER BEACON RECEIVER:

Frequency:

75 MHz Crystal Controlled

Sensitivity:

Low:

High:

Capable of: (preset at factory for field application)

1000 Volts (Hard) (360 to 570 V soft)

200 Volts (Hard) (130 to 200 V soft)

Selectivity:

-6 dB at ±10 kHz

-40 dB at ±120 kHz

External Lamp Output:

7.5 (±4 VDC unloaded, at maximum brightness) VDC pos-

itive when active, max. current 125 mA

MM Sense:

Active high (4.5 ± 1.0VDC)

BendixKing

AeroPanel 100 Audio Selector Panel

Installation and Operator’s Manual

89000063-011 Page 1-4 Rev. 0, April 2020

1.6 AeroPanel 100 EQUIPMENT SUPPLIED

1 ea. of the following units:

Model

Description

PS Part Number

BendixKing Part

Number

AeroPanel 100

Audio Panel with IntelliAudio®, Marker, Stereo Intercom, and

Bluetooth connectivity. Includes Bluetooth Streamer

050-890-5466

89000063-001

Installation Kit: 250-890-5464

Description

Quantity

Part

Number

Installation rack assembly

430-890-5464

Rack back plate

430-890-0050

44-pin connector kit

120-891-2045

Back shell, connector

625-025-2465

Back shell Retainer

431-891-0100

4 40 X 7/16 screw w/nylon patch

475-440-0007

4 40 X 3/8 screw w/nylon patch

475-440-1038

4-40 x ¼” screw with lock washer

475-440-0001

Solder Lug

475-009-0001

Nylon Cable Clamp

625-001-0002

#6-32 x ½” Flat head Philips screw

475-632-0012

#6-32 Clip Nut

475-630-0002

1.7 EQUIPMENT REQUIRED BUT NOT SUPPLIED

a. Circuit Breaker: 1 ea.; 5 amp PULL TYPE REQUIRED for AeroPanel 100

b. Speaker, 4 

c. Headphone Jacks (Stereo, as Required)

d. Microphone Jacks (as Required)

e. Headphones, 150 (Stereo), up to 6 as required

f. Microphones, up to 6 as required

g. Marker Antenna (75 MHz, VSWR <1:1.5, and appropriate for the airspeed)

h. Interconnect Wiring

1.8 LICENSE REQUIREMENTS

None

AeroPanel 100 Bluetooth™ Radio approval:

FCC ID: QOQWT32i

Industry Canada ID: 5123A-BGTWT32i

CE EMC Directive 89/336/EEC as amended by Directives 92/31/EEC and 93/68/EEC

BendixKing

AeroPanel 100 Audio Selector Panel

Installation and Operator’s Manual

89000063-011 Page 2-1 Rev. 0, April 2020

Section II - INSTALLATION

2.1 GENERAL INFORMATION

2.1.1 SCOPE

This section provides detailed installation and interconnection instructions for the BendixKing AeroPanel

100, AeroPanel 100 Model Audio Selector Panel/Intercom/ with internal Marker Beacon.

Please read this manual carefully before beginning any installation to prevent damage and post-installation

problems. Installation of this equipment requires special tools, test equipment (refer to section 2.13.1) and

knowledge as required by 14 CFR 65.81 (b).

2.1.2 Certification Requirements NOTE

The AeroPanel 100 requires specialized knowledge and tools for an effective installation. An appropriately

rated Certified Aircraft Repair Station must install this equipment in accordance with applicable regula-

tions. BendixKing warranty is not valid unless the equipment is installed by an authorized BendixKing

dealer.

Failure to follow any of the installation instructions, or installation by a non-certified individual or agency

will void the warranty, and may result in an unairworthy installation.

2.2 Unpacking and Preliminary Inspection

Use care when unpacking the equipment. Inspect the units and parts supplied for visible signs of shipping

damage. Examine the unit for loose or broken buttons, bent knobs, etc. Verify the correct quantity of com-

ponents supplied with the list in Section 1.6. If any claim is to be made, save the shipping material and contact

the freight carrier. Do NOT return units damaged in shipping to BendixKing. If the unit or accessories show

any sign of external shipping damage, contact BendixKing to arrange for a replacement. Under no circum-

stances attempt to install a damaged unit in an aircraft. Equipment returned to BendixKing for any other

reason should be shipped in the original BendixKing packaging, or other UPS approved packaging.

2.3 Equipment Installation Procedures

2.3.1 Cooling Requirements

Forced air-cooling of the AeroPanel 100 is not required. However, the units should be kept away from heat

producing sources (i.e. defrost or heater ducts, dropping resistors, heat producing avionics) without adequate

cooling air provided.

2.3.2 Mounting Requirements

The AeroPanel 100 must be rigidly mounted to the instrument panel of the aircraft structure, within view and

reach of the pilot position(s). Installation must comply with FAA Advisory Circular AC 43.13-2B, or other

FAA-approved aircraft technical data. The unit may be mounted in any area where adequate clearance for

the unit and associated wiring bundle exist.

To prevent noise, avoid installing the unit close to high current devices or systems with high-voltage pulse

type outputs, such as DME or transponders. Avoid running the interconnecting bundles near any high current

wires.

2.3.3 Audio Panel Mounting Rack Installation

Remove the unit from the mounting tray by unscrewing the 3/32" hex-head screw that is in the center of the

unit. Use caution to avoid hitting the photo-detector lens. Carefully slide the unit free of the tray. Set the unit

aside in a safe location until needed. Install the tray using six clip nuts (475-630-0002), and six FHP 6-32 x

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

tray.

BendixKing

AeroPanel 100 Audio Selector Panel

Installation and Operator’s Manual

89000063-011 Page 2-2 Rev. 0, April 2020

2.3.4 Audio Panel Tray and Connector Assembly

The rack connectors mate with two 44-pin connectors in the AeroPanel 100. The connectors are a sub-min-

iature crimp-type, and require the use a hand crimp tool, from table below (or equiv.). The connectors are

mounted to the tray back plate with #4-40 screws (475-440-1038), from the inside of the tray and the mount-

ing block, 431-891-0100. Ensure that proper strain relief and chafing precautions are made during wiring and

installation, using the cable clamp (625-001-0002).

Two grounding lugs are provided, which may be attached to the rear mounting plate with 2 ea. #4-40 x ¼”

screws with captivated lock washers. These provide a convenient location to connect the shield ground ter-

minations.

Manufacturer

Crimping Tool

Positioner

Extraction tool

AMP

601966-1

601966-6

91067-1

Daniels

AFM8

K42

M24308-1

ITT-Cannon

995-0001-584

995-0001-739

91067-1

Table 2-1 Connector Pin crimping tools

2.4 Cable Harness Wiring

Referring to the appropriate Appendix, assemble a wiring harness as required for the installation. All wires

must be MIL-SPEC in accordance with current regulations. Two- and three-conductor shielded wire must be

used where indicated, and be MIL-C-27500 or equivalent specification. Proper stripping, shielding and sol-

dering technique must be used at all times. It is imperative that correct wire be used.

Refer to FAA Advisory Circular 43.13-2B for more information. Failure to use correct techniques may result

in improper operation, electrical noise or unit failure. Damage caused by improper installation will void the

BendixKing warranty.

2.4.1 Electrical Noise

Due to the variety and the high power of radio equipment often found in today's general aviation aircraft,

there is a potential for both radiated and conducted noise interference.

The AeroPanel 100 power supply is specifically designed to reduce conducted electrical noise on the aircraft

power bus by at least 50dB. Although this is a large amount of attenuation, it may not eliminate all noise,

particularly if the amplitude of noise is very high. There must be at least 13.8 VDC present at the connector,

J2 pins 8 & 9, of the AeroPanel 100 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 interfer-

ence is possible. The AeroPanel 100 was designed in a RFI hardened chassis and has internal Electromag-

netic 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 air-

frame that are detected by the audio system. Follow the wiring diagram very carefully to help ensure a min-

imum of ground loop potential. Use only Mil Spec shielded wires (MIL-C-275000, or better). Under no

circumstances combine a microphone and headphone wiring into the same shielded bundle. Always use a 2-

or 3-conductor, shield wire as shown on the installation-wiring diagram.

The shields can be daisy-chained together, and then connected to the ground lugs mounted on the back plate

shown in Appendix B.

Radiated signals can be a factor when low level microphone signals are "bundled" with current carrying

power wires. Keep these cables physically separated. It is very important that you use insulated washers to

isolate the ground return path from the airframe to all headphone and microphone jacks.

2.4.1.1 Music Inputs and Noise

AeroPanel 100 units utilize a differential input to help prevent noise from entering the music system. This

feature is usually transparent to the installer; however, it is important that the appropriate music signal and

BendixKing

AeroPanel 100 Audio Selector Panel

Installation and Operator’s Manual

89000063-011 Page 2-3 Rev. 0, April 2020

ground connections are made directly to the dedicated music signal and ground inputs on the AeroPanel 100.

The power for IFE and audio panel should be a common bus.

If a music jack instead of a Bluetooth music source is installed for Music 1 or 2, we recommend grounding

the jack to airframe ground.

NOTE

Adding a high-performance audio control system, particularly in conjunction with high-performance active

noise canceling headsets, cannot improve on older avionics that were designed for cabin-speaker use. Ben-

dixKing makes no claim that the audio panel will provide a noise-free audio quality under all installation

conditions, particularly with older avionics.

2.4.2 Headphone Wiring

In order for the IntelliAudio® spatial audio to perform correctly, the audio panel must be connected to stereo

headsets, and the left/right outputs wired correctly as shown in Appendix D.

2.4.3 Power

The AeroPanel 100 is compatible with both 14 and 28 Volt DC systems. A five (5) Amp circuit breaker is

required for all installations. Power and ground wires should be #22 connected to J2 Pins 8 and 9. Connect

airframe ground to J2 Pin 10 and 11 only. No dropping resistors or forced air cooling is required.

2.4.4 Audio Panel interface

The AeroPanel 100 is designed to interface with standard aircraft avionics, and presents a 510 receiver

impedance. For best results, a twisted-shielded cable is recommended from the avionics audio source to the

audio panel, with the shield grounded at the audio panel end.

Some avionics do not provide a separate audio low, and may introduce additional electrical noise into the

system. For best results, connect the audio low from the audio panel to the radio ground, using one conductor

of the twisted-shielded cable.

2.4.4.1 Speaker Load

The AeroPanel 100 contains one speaker amplifier, and does not provide a speaker load for legacy units.

Some units with internal speaker amplifiers, such as the King Radio KX170-series, require a resistive load

to prevent damage if their speaker amplifier is not used. Connect the speaker output from the legacy radio to

an external speaker load of at least 16 , 3W.

2.4.5 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.

2.4.6 Backlighting

Control of the GREEN and WHITE button text and backlighting

is through the aircraft avionics dimmer For 14 V aircraft, connect

J2 Pins 6 and 7 to the aircraft dimmer bus, and pin 5 to ground.

For 28-volt systems, connect pin 7 to the aircraft dimmer, and

pins 5 and 6 to ground.

If an external dimmer control is not used, or the dimmer voltage

is less than 0.5 VDC, the white text will be at full intensity.

There is a backlighting adjustment, see §2.8 for information.

2.4.7 Unswitched inputs

J1, pins 31, 29 and J2 pin 15 are unswitched, unmuted (by transmitter keying), inputs # 1, 3 and 4, respec-

tively. These inputs are presented to the pilot and copilot regardless of the audio configuration, and will

always mute the entertainment inputs. These 510Ω inputs can be used for altimeter DH audio, GPS waypoint

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