Telex BTR-800 Audio + Audio a Switched Headphone Ground, TR-825 Rear Panel/Connector/Antennas

Controls and Connections - Rear Panel

1

SET MENU

(1) Microphone

Telex Units

(4) Headphone

MIC	PT	PT
	TX	TALK

Shield (-)

Low (-)

SET MENU

(2) Microphone

(3) Headphone

2

6

Audio (+)

High (+)

3	MIC PT PT
	TX TALK
4
	5

7

8

9

(1) Microphone	(5) Headphone
Shield (-)	Audio B
(2) Microphone	(4) Headphone
Audio (+)	Audio A

(3) Switched Headphone Ground

Figure 8

TR-825 Rear Panel/Connector/Antennas

1.[MENU] and [SET] buttons – Used to select menus and set options on the LCD.

2.LCD (Liquid Crystal Display)

3.[UP] and [DOWN] buttons – Used to select beltpack op- tions on the LCD.

4.Microphone Gain – Adjusts the headset’s microphone gain. Adjust so that the BAT/OM LED will flash at the be- ginning of most words at normal speech levels

5.Push-to-Talk/Push-to-Transmit Switch –

Push-to-Talk (PT TALK) – The transmitter is always on. No audio sent unless the talk switch, WTA or SA button pressed. Recommended position.

Push-to-Transmit (PT TX) - The transmitter and audio path are off except when the talk switch, WTA or SA button is pressed.

6.Headset Connector – Male XLR connector for Telex units, Female XLR connector for RTS units. A dynamic or electret headset microphone is automatically detected by the beltpack and a bias voltage supplied if needed. Four pin Telex/RTS units are monaural. Five pin Telex/RTS units have a software set-up which grounds or opens pin 3.

Menu Set		RESULT ON 5-PIN
	PIN 3	DUAL HEADPHONE
[ Ab SEP ]	GND	A in one side, B in other side
[ Ab Add ]	OPEN	A + B

RTS Units

(1) Microphone

Shield (-)(2) Microphone

Audio (+)

(4) Headphone	(3) Headphone
Low (-)	High (+)

(1) Microphone

Shield (-)(2) Microphone

Audio (+)

(3) Switched

Headphone Ground

(4) Headphone

(5) Headphone (Audio A)

(Audio B)

Figure 9

Headset Jack Wiring

Single sided 5-pin headsets will only receive A or B, depend- ing on how headphone is wired. These headsets must have the beltpack set for [Ab SEP]

7.Battery Latch – Press down to enable the battery pack to be released. While the latch is held down, slide the battery pack about 1/8 inch back, toward the latch, until it stops. Then lift out.

8.Receive Antenna – Screw type ¼-wave replaceable an- tenna. The color dot on the screw end of the antenna must match color dot on antenna receptacle.

9.Transmit Antenna – Screw type ¼-wave replaceable an- tenna. The color dot on the screw end of the antenna must match color dot on antenna receptacle.

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