A high quality radio link or re broadcast receiver, suitable for supplying programme feeds to transmitters and remote broadcasts. With multi channel functions available and a wide range of frequency options requiring no additional encoding equipment
The RX400 Series II is a high quality radio link or rebroadcast receiver suitable for supplying programme feeds to transmitters and for remote broadcasts. It updates the already highly successful RX400, adding numerous innovations and including many previously optional features as standard. A completely new RF front end design using the latest semiconductor and filter components gives performance far exceeding that of conventional circuits (which are often based on low-cost consumer designs), while upgrades to the IF stage, baseband filter and stereo decoder have further enhanced the outstanding audio performance.
Paired with an sbs TX400 to form an STL or slaved to an “off-air” reference, the RX400 can receive a stereo composite/ multiplex signal generated at the studio, requiring no additional encoding equipment at the main transmitter site. The exceptionally flat frequency and phase responses to 100kHz enable RDS and SCA services to be conveyed without degradation. Both unbalanced composite/multiplex outputs and balanced, low pass filtered and de-emphasised stereo outputs are provided as standard. Alternatively, the internal stereo decoder may be disabled using a rear panel switch to give two separately buffered mono outputs. On the front panel, a stereo headphone monitor jack and signal strength/audio level meter are included. Signal strength (with the threshold level easily previewed and set on the front panel meter) and pilot detectors monitor reception and provide relay contacts for control of a main transmitter or other equipment.
A standby composite/multiplex input is also fitted. Power failure or loss of received signal drops out an internal changeover relay and routes this standby signal through to the output. If a second receiver is connected to the standby input then a “hot standby” system is formed. Further receivers or even a locally generated composite/multiplex source may be connected in “daisy-chain” fashionif required.
The functionality of the RX400 can be further enhanced by adding up to two internal expansion modules, such as RDS OK and tone detectors. The RX400 receiver is available in the following standard variants, all covered by a five year warranty. Other options such as non-standard frequencies and differing IF bandwidths are available to special order and sbs are happy to advise on specialised requirements.
RX400/50 (48 to 55MHz) and RX400/RBRX (66 to 108MHz) These are single-conversion receivers operating on a single frequency. The RX400/RBRX is specifically designed for use as an FM rebroadcast receiver and has been optimised to cope with the high adjacent channel signals often encountered in this application. RX400/400 (300 to 520MHz) and RX400/800 (800 to 960MHz) These are dual-conversion receivers available in single- or four-channel versions. Selection is made either with the front panel switch or via the rear panel control/telemetry connector. They also support phantom powering of in-line RF preamplifiers.
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