Beltpack Operation

Power/Local Headset Volume

You should now be ready to turn the beltpack “ON”. Rotate the OFF/ON Volume Control Switch on the beltpack clockwise to turn the unit on.

ON/OFF SWITCH AND VOLUME CONTROL

 

 

BAT/

TALK

CHANNEL

 

 

O

O.M.

1

2

 

 

 

F

 

 

 

 

 

 

 

F

 

 

 

 

ON

 

 

 

 

 

VOLUME

 

TALK

AUDIO

 

Figure 42

Off/On Volume Control Switch

Battery Check

As you rotate the OFF/ON volume control knob clockwise to turn the unit on, note that the battery LED (Labeled “BAT/O.M.”) should flash one time on good batteries. Poor batteries will cause the LED to be illuminated continuously and a bad or unus- able battery will not cause any illumination at all.

LOW BATTERY AND OVERMODULATION

INDICATOR LED

 

 

BAT/

TALK

CHANNEL

 

 

O

O.M.

1

2

 

 

 

F

 

 

 

 

 

 

 

F

 

 

 

 

ON

 

 

 

 

 

VOLUME

 

TALK

AUDIO

 

Figure 43

Low Battery and Overmodulation Indicator

LED

Push-to-Talk/Lock-to-Talk

To enable the talk function on the beltpack press and hold down on the talk button and begin talking. Releasing the talk button will discontinue the mi- crophone audio. For continuous talk, quickly press and release the talk button. This locks on the talk function. To release the talk function press and re- lease the talk button once.

NOTE: The talk LED will be illuminated whenever the talk function is activated.

 

 

BAT/

TALK

CHANNEL

 

 

O

O.M.

1

2

 

 

 

F

 

 

F

 

 

 

 

ON

 

 

 

 

 

VOLUME

 

TALK

AUDIO

 

PUSH-TO-TALK / LOCK-TO-TALK SWITCH

Figure 44

Push-to-Talk/Lock-to-Talk Switch

Microphone Gain

The microphone gain of the beltpack’s headset may need to be adjusted for various audio conditions. The Battery/Overmodulation (O.M.) LED will flash red when Mic Gain is too high and will need to be turned down. If the LED does not flash red at all, and the audio from the unit sounds low, then the gain may need to be turned up. The gain should be adjusted so the LED flashes red only on loudest speech.

Using the plastic screwdriver (supplied), adjust the control appropriately. Note that the volume heard can also be adjusted by changing the spacing be- tween the microphone and your mouth.

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Telex BTR-500/600C Beltpack Operation, Power/Local Headset Volume, Battery Check, Push-to-Talk/Lock-to-Talk