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Clear-com TW47 2-way radio/walkie-talkie interface
Clear-Com TW47 2-Way Radio/Walkie-Talkie Interface
The TW-47 is a stand-alone interface designed to connect a 2-way radio or walkie-talkie into a single channel of a standard Clear-Com, RTS* (*for RTS systems equipped with the Call Light feature), or compatible 2-wire party-line intercom system. It provides both audio connection and "push-to-talk" transmitter keying, using standard Call signals.
The ability of a 1- to 5-watt walkie-talkie to both talk and receive from the wired intercom system can greatly extend an intercom system's capability, especially in very large indoor and outdoor facilities and venues. The TW-47 is powered directly from the intercom line, and connection to the radio is via a single DB-9F 9-pin connector. The interface has extensive RF and EMI isolation to prevent the 2-way radio RF from radiating into the intercom system.
In order to accommodate the widest variety of 2-way radios, the TW-47 is supplied with a 9-pin connector and wiring diagrams for many 2-way radios.
The combination of internal jumpers (switches) and front panel "Transmit" and "Receive" level controls assures correct level matching to virtually any radio. Adjustments from -57dB microphone level to +11dB line level are supported. A bi-color LED provides a visual indication of audio level from the intercom line.
A relay contact provides the required "Push-to-Talk" transmitter "keying" of the radio. This relay is activated by detecting the "Call Signal" on the intercom channel. The relay contacts, in conjunction with the custom-made radio cable, allow correct transmitter keying of virtually any type of radio. A "Transmit Key" LED indicates that the relay is active.
Certain Clear-Com stations can be set up so that the Call signal is activated automatically when the Talk button is pressed (Talk-on-Call). With these stations, the radio transmitter can be keyed by simply pushing the Talk button. The operation of the 2-way radio then becomes seamless and transparent to station users.
* Interfaces any 2-way radio to a Clear-Com, RTS, or compatible system
* Individual transmit and receive level controls
* Bi-color LED audio level indicator
* Small footprint - will fit anywhere
* Special event production and coordination
* Touring shows where all usable, licensed radio frequencies are already allocated
* House manager communications and tech rehearsals
* Wherever increased mobility and greater reach are required from theintercom system
* Frequency Response: 200-20KHz 3dB
* Max Level Before Clipping: >=+17dBu
* Green LED Threshold: -22dBu 3dB
* Red LED Threshold: -16dBu 3dB
* Input Impedance: 400 ohms 100 ohms
* Frequency Response: 200-8KHz 3dB
* Max Gain J7 ON, J8 ON: -12dBu 3dB
* Max Gain J7 OFF, J8 ON: +2dBu 3dB
* Max Gain J7 OFF, J8 OFF: +27dBu 3dB
* Max Level Before Clipping: >=0dBu
Input Voltage Range: 20-30VDC
Current with Audio: <=50mA
* Front Panel Controls and Indicators
AudioLevel Hi: (1) Red LED
Audio Level Norm: (1) Green LED
Receive LevelAdjust: (1) Control
Transmit Level Adjust: (1) Control
* Dimensions (H x W x D): 1.8" x 3.95" x 6.4"
