Flightcom 4DX CLASSIC - Installation; Installation Procedure; Headset Adjustments and Features; Specifications and Wiring

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INSTALLATION

Insert the larger plug into the jack marked “headphone” or “phone”.

• Insert the smaller plug into the jack marked “microphone” or “mic”.

• Set the stereo/mono switch on the cable splitter box to the “M” position. If

connecting to a stereo intercom, set the switch to the “S” position.

• Adjust headband slider and mic boom for proper t and comfort.

• Place the microphone no more than 1/8” from lips, at the corner of the mouth.

This is critical to the performance of the noise canceling electret microphone.

• One volume control is located on the dome with the mic boom, to adjust the level

of audio.

If the aircraft does not have a built-in push-to-talk (PTT) switch, a portable PTT switch

must be installed in order to use the radio. The master gain control located in the

aircraft radio should be optimized by an avionics technician whenever adding a new

model microphone to the system.

HEADSET ADJUSTMENTS

Adjustable

headband

Adjustable

boom

Volume control

Mic Placement

Place mic no more than 1/8”

from lips. Placement of mic is

critical for proper operation.

WARNING

If the microphone is positioned incorrectly, you may

experience a reduction or interruption in the audio

and or deterioration in clarity of intercom and radio.

HEADSET FEATURES

• Passive noise reduction by 24db

• Stereo/mono switchable

• Noise-cancelling electret microphone

• Adjustable headband

• Flexible mic boom with slide adjustment for accurate mic positioning

SPECIFICATIONS

Technical Spec

• Weight ...................................... 17.1 oz Ave. (w/o Comm Cable)

• Noise Reduction Rating ............................................... 24db

Microphone

• DC Bias Supply .............................8 to 16 volts, not polarity sensitive

• Source Resistance .........................................220 to 2200 ohms

MIL SPEC

• Humidity & Temperature per MIL-STD 810F and 810G

• Chemical Exposure per MIL-STD 810F and 810G

SAE

• Salt Spray per J1455, Sec. 4.3

WIRING DIAGRAM

Caution:

Bias voltage supplied to the microphone must come from voltage and resistance

ranges specified above. Voltages supplied in excess of those stated in the

specifications can cause microphone failure and void warranty. The mic audio signal

is present between the ring and barrel of the mic plug; tip is reserved for transmit

keyline.

Right

Left

Speakers

Mic.

6.3 mm Plug

5.2 mm Plug