Crystal Vision Debuts Fiber Transmit/Receive System

Crystal Vision has introducted the FTX-VF dual channel fiber transmitter and FRX-VF dual channel fiber receiver for its Vision frame system. The units have been designed to transmit and receive 3Gb/s, HD and SD signals over large distances.

Meeting the SMPTE 297-2006 short-haul specification, Crystal Vision said they can be used with single-mode or multi-mode fiber to move signals around in big installations. The 40-channel device holds up to 20 space-saving cards and fits in a 3U rack.

The FTX-VF and FRX-VF can be used together or with alternative transmitters and receivers. The reclocking FTX-VF has two independent 3Gb/s, HD or SD inputs, each with one optical output. It can transmit a serial digital signal down a fiber optic cable to the FRX-VF receiver, which offers two optical inputs and two reclocked 3Gb/s, HD or SD outputs per channel.

This means it doubles as a DA and reduces the need, rack space and cost of having distribution amplifiers after the receiver. All outputs on the FRX-VF are DVB-ASI compatible.

The FTX-VF includes a non-hazardous Class 1 laser that will automatically switch off if there is no video input. The laser can also be shut down manually. Warnings are given when the laser bias current is above the threshold indicating imminent failure, and also when the laser is producing low output power and should be replaced immediately.

The standard FTX-VF uses a wideband 1310nm laser, but Crystal Vision can alternatively provide narrowband CWDM lasers on request. This allows the broadcaster to get multiple signals through one fiber by using a different wavelength of light for each signal. The output wavelengths are defined by the ITU and are available in ten combinations.

Control and monitoring options for devices include the integrated control panel on the Vision frame, the VisionPanel remote control panel, SNMP and the VisionWeb Control web browser software.

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