Telex BTR-500/600C Base Station Transceiver, Front Panel Controls and Connections

Base Station Transceiver

Controls and Connections

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					AUDIO		I/C
			IN	OUT		OUT TELEX IN
					CHANNEL
RadioCom	TM
					1
ON			I/C		AUTO		AUX	A	1	B
BP			IN	OUT	2
EA
L C							OFF	ON
T K									CODE SWITCH
			AUX
OFF		LOCAL		BELT PACK

BTR-600C

SIDETONE

HEADSET

MIC

GAIN

2

VOL TALK/

OM

TALK

5 7 8 6 12 13 19

Figure 1

Front Panel Controls and Connections

1.Power Switch - Illuminates when on.

2.Beltpack Light - Illuminates when a beltpack is transmit- ting to base station.

3.Intercom In Level Control - Adjust for optimum level. Intercom light #11 should just flash red on loudest speech.

4.Intercom Out Level Control - Adjusts output to match input level of wired intercoms.

5.Auxiliary In Level Control - Adjust for optimum level. Auxiliary light #13 should just flicker from green to red on loudest sounds.

6.Auxiliary Out Level Control - Adjusts output to match input level of auxiliary equipment.

7.Sidetone Local Control - Adjusts level of voice feedback to earphone when a headset is plugged into jack #18.

8.Sidetone Remote Control - Controls sidetone level in the beltpack.

9.Audio Channel Switch And Lights -

A.“I/C” switch on rear panel set to Telex - Selects either “I/C 1 or 2" jack (and corresponding pins on ”I/C Loop Thru"). In “Auto” position; allows selection of chan- nels 1 or 2 from the beltpack.

B.“I/C” switch on rear panel set to RTS - Selects RTS channel 1 or 2 on both I/C jacks (and corresponding pins on “IC Loop Thru”). In “Auto" position; allows selection of channels 1 or 2 from the beltpack.

10.Intercom Switch - See settings below.

A.“I/C” switch on rear panel set to “Telex”

1.“Telex Out” Setting - Intercom is disconnected from all “I/C” jacks on rear panel.

2.“Telex In” Setting - Intercom is connected to “I/C Loop Thru” and “I/C 1 or 2" jacks. Channel 1 or 2 is selected by switch #9 or the channel switch on the beltpack.

B.“I/C” switch on rear panel set to “RTS” - Switch has no effect. All I/C jacks on rear panel are active on either setting.

11.Intercom Light - Flashes red when input level is too high. See #3 for adjustment.

12.Auxiliary Switch - Turns the auxiliary input on and off.

13.Auxiliary Light - Illuminates green when switch #12 is on. Flashes red when input level is too high. See #5 for ad- justment.

14.Code Switch (BTR-600C Only) - Allows user to select cipher code (over 65,000 available). Any combination of letters and/or numbers may be selected except 0000. Data is unencrypted when the setting is 0000. The code switch settings on the BTR-600C and TR-600C must match ex- actly.

15.Volume, Headset - Controls volume on headset plugged into #18

16.Talk/Overmodulation Light - Illuminates green when talk switch #19 is on. Flashes red when headset micro- phone is over modulated - See #17 for adjustment.

17.Microphone Gain Control - Adjust so that light #16 just flickers from green to red on the loudest speech.

18.Headset Connector - Standard “XLR” type. Plug for Telex units and jack for RTS units. Wired as follows:

Telex Units

(1) Microphone	(4) Headphone
	Low (-)
Shield (-)
(2) Microphone	(3) Headphone
	High (+)
Audio (+)

RTS Units

(4) Headphone

Low (-)(1) Microphone

Shield (-)

(3) Headphone

High (+)(2) Microphone

Audio (+)

Figure 2 Headset Wiring

19.Talk Switch - Press-to-talk, release to disable. Press and release quickly to stay on.

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