Fibre Transmitter and Receiver

perfect for moving signals around in big installations

Crystal Vision has released a fibre optic transmitter and receiver for its new Vision frame system. The FTX-VF dual channel fibre transmitter and FRX-VF dual channel fibre receiver have been designed to transmit and receive 3 Gb/s, HD and SD signals over large distances.

Fibre transmitter and receiver from Crystal Vision (Source: Crystal Vision)

Meeting the SMPTE 297-2006 short-haul specification, they can be used with single-mode or multi-mode fibre and are perfect for moving signals around in big installations. With up to 20 space-saving cards (40 channels) fitting in 3U, the useful features include full DVB-ASI compatibility and the ability to fit CWDM lasers – along with multiple outputs and loop-throughs which reduce the need for additional distribution amplifiers.

The FTX-VF and FRX-VF are ideal for use together, but can be used with alternative transmitters and receivers. The reclocking FTX-VF has two independent 3 Gb/s, HD or SD inputs, each with one optical output. It can transmit a serial digital signal down a fibre optic cable to the FRX-VF receiver, which offers two optical inputs and two reclocked 3 Gb/s, HD or SD outputs per channel – meaning 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. Both cards meet the SMPTE 297-2006 short-haul specification, allowing operation with both single-mode and multi-mode fibre. This makes them suitable for a wide range of applications – from moving signals around in large installations to passing signals between Outside Broadcast vehicles.

The FTX-VF includes many useful features. This includes a non-hazardous Class 1 laser that will automatically switch off if there is no video input – facilitating system debugging and prolonging laser life. The laser can also be shut down manually. Helpful 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. Specially modified laser modules allow the FTX-VF to cope successfully with pathological signals – with this challenging test pattern useful for testing a serial link. The FTX-VF also includes two input loop-throughs per channel which can be used to distribute the input video to equipment such as a picture monitor, or alternatively for system checking.

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