Telex PROCOM2 User Instructions

PROCOM

2

AIRCRAFT INTERCOM

USER INSTRUCTIONS

INSTALLATION

(Refer to the System Configuration drawing)

Plug the ProCom 2 (PC 2) into the aircraft radio or audio panel jacks.

NOTE: If the aircraft radio does not provide sidetone, the pilot will not be able to hear himself or herself

in the headset during aircraft-to-tower transmissions.

Plug pilot and copilot (or passenger) headphone and microphone plugs into the appropriate jacks on the top panel
of the PC 2.

Push To Talk

1. If the aircraft has a built-in pilot yoke switch, it is not necessary to use the pilot PTT jack on the PC
However,
keying the transmitter with the built-in yoke switch will also ground the jack tip. This signal is then
sensed by the PC
during transmission.

2. If the aircraft has a built-in copilot yoke switch, it should not
desired, use a portable PTT switch plugged into the copilot PTT switch jack on the PC 2.

3. If poltable

to

be

Connect an extemal msic source to the rear panel MUSIC INPUT jack of the PC 2 using a 0.140-inch (3.6 mm)
stereo "miniplug."

Use one of two methods to provide power to the PC 2 intercom:

For internal power operation, install a 9-~0lt battery in the side compartment of the PC 2.
For external power operation, use an optional aircraft cigarette lighter cable (Telex Catalog Number 96513-

000). It is recommended that you use a 100 mA (fast blo) fuse in the external power source. Plug the cable
into the aircraft cigarette lighter and into the AUX POWER jack on the rear panel of the PC 2.

it

is important that the aircraft radio or audio panel microphone jack tip

2

(via the Ytable microphone/PTTplug) to cause proper operation of the intercom

PTT

switches are used,

pressed to talk over the intercom. Plug microphones into the PC 2 microphone jacks only.

do

(PlT)

Swltch Notes

be

wired so that

be

used. lf copilot PTT capability is

not plug microphones into them, as the PTT switches will have

CAUTION

2.

O

Copyright

Ensure that the polarity of the external power is as shown in the figure
below. lrrpmper connection may result in damage to the PC 2.

AUX POWER

Telex

Communicalions.

Inc.

All

tights

12-28 VDC

resewed.

@

100MA

TELEX,

AIRCRAFT

CIGARETTE AIRCRAFT RADIO MUSIC

LIGHTER OR AUDIO PANEL SOURCE

n

m

n

opTloNA$

POWER Y-CABLE

CABLE

PILOT HEADSET COPILOT HEADSET

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PHOY

,

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PC

Q

2

REAR

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4

go&

VIEW

n

u

PORTABLE

PILOT PTT

SWITCH

PC

2

TOP VIEW COPILOT

System Configuration

PORTABLE

PTT SWITCH

OPERATION

Leave the aircraft radio and music source off, and set the PC 2 locking power switch to the ON position by pulling
outward on the switch and pushing

Tum the SQ (squelch) control fully clockwise.

NOTE: This is not a "hot mic" position, but it is the position where minimum voice level will be required

to activate the intercom.

While talking into pilot and copilot microphones, adjust the PILOT VOL and COPILOT VOL (headphone volume)
controls as desired.

Tum on the music source. If the music source has a volume control, adjust it for the desired listening level in the
headohones. If the music source does not have a volume control. the level mav be adiusted usina the MUSIC

trimnier on the rear panel of the PC
Talk into a microphone and note the amount of music muting during talk. If more or less muting is desired, adjust

the MUSIC MUTE trimmer on the rear panel of the PC
Turn on the aircraft radio, and adjust the cabin speaker volume to an acceptable listening level (this will establish

a nominal input volume level for the intercom). Note the radio volume when listening with the headphones, and

it

upward.

2.

2.