Telex SR-50, ST300 SR-400 Synthesized Receiver, General Description SR-400, Operating Features

SPECIFICATIONS
SR-50 Single Channel Receiver
Temperature Range		0 to +50 degrees C
Supply Voltage		2-3 Volts, (2) AA Batteries
Battery Life		20-30 Hrs - Alkaline
		8-10 Hrs - Nicad
Sensitivity (12 dB SINAD @ 25 kHz deviation)		0.5µ V typical/1µ V maximum
Distortion		less than 2%
Frequency Response - 100 Hz-10 kHz		Less than 3 dB Variation
Audio Output @ 10% Distortion
Battery Input	2.0V	3.0V
Voltage
8 ohm	15 mW	80 mW
32 ohm	10 mW	50 mW
Controls and Connections		Volume OFF/ON Switch,
		Audio Output Jack

SR-400 SYNTHESIZED

RECEIVER

General Description SR-400

The Telex SR-400 Receiver is a component of a system which operates on seventeen user selectable channels in the 72 to 76 MHz frequency band. The receivers are designed to be used with the Telex ST-300 and PST-170 Transmitters.

Operating Features

Volume OFF/ON Control: This thumbwheel con- trol serves as both an off/on switch and as a volume control. The receiver is turned off when the control is in the extreme counter-clockwise position, when viewed from the rear, and the volume is loudest when the control is in the extreme clockwise posi- tion.

NOTE: A headphone or other device must be plugged in the headphone jack in order to turn on the SR-400. This is to prevent draining the batteries if the switch is accidently left on.

Treble Control: A push button treble control is pro- vided to enhance higher frequency audio when the button is engaged, indicated by .

Headphone Jack: The receiver jack accepts a 0.140-inch (3.5 mm) diameter miniature plug. A va- riety of accessory units can be plugged into this jack for listening.

Belt Clip: The belt clip supplied is detachable by spreading the wire apart at the tops and removing one side of the clip form the case and then the other.

-4-