Telex BTR-300 operating instructions Receive, Features

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SPECIFICATIONS BTR-300 (Cont.)

 

Receive

RF Frequency Range

150-216 MHz

RF Frequency Stability

Crystal Controlled, 0.005%

Type

Dual conversion superheterodyne, FM

RF Sensitivity

Less than 0.6 µV for 12 dB SINAD

IF Selectivity

3 dB at 30 kHz (4 pole Monolythic Filter)

Image Rejection

65 dB or better

Squelch Quieting

90 dB

Squelch Threshold

1.0 µV (Internal)

Signal-to-Noise Ratio

90 dB

Receive Antenna

5/8-wave (supplied)

 

SO239 connector on chassis

Distortion

Less than 1% at Rated Output

FEATURES

The RadioCom Model BTR-300 is a Base Station with one transmitter and four re- ceivers. It is designed for portable two way communication with the capability for inter- face to other audio systems. Features include:

￿An extremely flexible unit that has the capa- bility to communicate at one time with up to four portable stations and wired stations (in- tercom and/or other audio source).

￿Powered by an external AC supply via the power jack on the rear of the unit. It can also be powered by any 12V AC/DC 700 mA source.

￿Intercom connections with the ability to in- terface with most wired intercom systems.

￿RF light indicator for each portable station.

￿All metal case for superior shielding.

￿Table or rack mountable.

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Contents Telex Table of Contents Block Diagram of System IntroductionGeneral Description Page Technical Information Specifications BTR-300 BTR-300 Base Station TransceiverFeatures ReceivePlug for Telex Unit Portable Enable Switches and IndicatorsFront Panel Refer to Figure Crophone GainPage Front Panel BTR-300 Rear Panel BTR-300 Technical Information Specifications TR-300 TR-300 BELT-PACK TransceiverJack for RTS Units Headset XLR Connector Wiring Controls and ConnectionsPlug for Telex Units External Controls, TR-300 Dynamic / Electret Equipment SET-UP BTR-300 SET-UPPin Wiring for Rear Panel Jacks Internal Intercom SwitchesRack Mounting Attaching Brackets for Rack MountingAttaching 5/8-wave Antenna Wave Antenna Assembly Antenna InformationAntenna Connections Remoting Antennas when Rack Mounted FT 60cm Minimum distance FT 2m Or more Is bestVertically Polarized Antennas Antenna PlacementAntenna Polarization Proper Dressing of the AntennasBTR-300 Antenna Placement Operating System Near ObstructionsHeadset Microphone Select Switch Transmit SwitchLocal Headset Connection Interconnection to a HARD-WIRED Intercom System Typical Interface to Wired SystemConnecting Auxiliary Audio SYS- TEM Power ConnectionDummy Load TR-300 SET-UP DYNAMIC/ELECTRET SwitchBattery Installation Headset ConnectionPRE-WALK-THRU Checklist Push to TALK/LOCK-TO-TALK Switch PowerLocal Headset Volume System OperationHeadset Volume Battery CheckLow Battery/ Overmodulation Talk Indicator Lights TR-300 OperationEnabling Audio Intercom SwitchEnable Switches Portable TransceiversBTR-300 Base Station Setting System Gain LevelsAdjusting Gain TR-300 PortableAuxiliary Gain controls System WALK-THRUIntercom Gain Auxiliary GainTroubleshooting Problem SolutionBC-300NM1 Battery Charger Battery InformationBC-300NM1 Battery Charger GeneralBC-300NM2 Battery Charger BC-300NM2 Battery ChargerAccessories Customer Service Information FCC Information JAN Made in U.S.A
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