Beltpack Transceiver; Controls And Connections - Telex RadioCom BTR-500/600C Operating Instructions Manual

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1. Volume Control and Power Switch - Turns power on
and off and controls headset volume.
2. Battery/Overmodulation Light - Flashes once when unit
is turned on if battery is good. If light stays on, battery is
low. If light does not flash, battery is dead.
Flickering red light when talking means microphone gain
is too high and speech will sound distorted. Adjust Mic
Gain control #7 so that the light barely flashes on the loud-
est speech.
3. Talk Switch - Press to talk, release to disable. Press and
release quickly to stay on continuously.
4. Talk Light - Illuminates when Talk function is on.
5. Audio Channel Switch - The Audio Channel Switch en-
ables the beltpack user to switch between wired intercom
channels 1 and 2 on the base station.
6. Side Tone Control - (Only installed in special beltpack to
beltpack direct communications units). Adjusts level of
voice feedback to earphone for a headset that is plugged
into the jack #10. The "Remote Sidetone" on the base sta-
tion controls the beltpack sidetone in standard units.
7. Microphone Gain Control - Adjust so the light #2 barely
flashes on the loudest speech.
8. Code Switch (TR-600C Only) - Allows the user to select
a cipher code (over 65,000 available). Any combination of
letters and/or numbers may be selected except 0000. Data
is unencypted when the setting is 0000. The code switch
settings on the TR-600C and BTR-600C must match ex-
actly.
9. Battery Latch - Press down to release the battery pack.
Pack slides off in opposite direction.

Controls and Connections

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Controls and Connections
Beltpack
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Figure 7
10. Headset Connector - Standard "XLR" type. Plug for Telex
units and jack for RTS units. Wired as shown.
(1) Microphone
Shield (-)
(2) Microphone
Audio (+)
(1) MICROPHONE
SHEILD (-)
RTS Units
11. Push-to-Talk/Push-to-Transmit - When the switch is set
to "Push-to-Talk", the transmitter in the beltpack is always
on, but no audio signal is sent unless the Talk Switch #3 is
activated. The "Push-to-Talk" switch setting is the recom-
mended position.
When the switch is set to "Push-to-Transmit", the trans-
mitter is turned on when the Talk Switch is activated and
turned off when the talk switch is deactivated.
12. Receive Channel - Changes the frequency of the receiver.
It must match the Transmit Channel of the base station.
13. Transmit Channel - Changes frequency of the transmit-
ter. It must match Receive Channel of the base station.
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(4) Headphone
Low (-)
(3) Headphone
High (+)
(4) HEADPHONE (3) HEADPHONE
LOW (-) HIGH (+)
Figure 8
Headset Jack Wiring
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Telex Units
(2) MICROPHONE
AUDIO (+)