DashBoard Enabled

IRT-6630-DDT & IRT-6630-DDR: 3G/HD/SD-SDI/ASI Fibre Optic Link

IRT-6630-DDT & IRT-6630-DDR Home Page, PDF Brochure

The IRT-6630-DDT and IRT-6630-DDR is a 3G/HD/SD-SDI/ASI single channel optical fibre link for point to point transmission using single mode fibre.


  • Transports 3G-SDI, HD-SDI, SD-SDI or ASI signal rates.
  • Path lengths up to 30 dB1 optical path loss using 9/125μm single mode fibre.
  • Automatic changeover switching of input for signal redundancy on Tx.
  • DashBoard software monitoring and control.

IRT-6630-DDT & IRT-6630-DDR Block Diagram

The IRT-6630-DDT and IRT-6630-DDR are transmit and receive modules designed principally for use as a serial data fibre optic transmission link for 3G-SDI, HD-SDI or SD-SDI applications conforming to SMPTE standards 424M, 292M and 259M-C using 9/125 μm single mode fibre. This enables the use of space saving fibre optic cable for reliable transmission of digital video signals over lengths greater than can be achieved with coaxial cable.

In addition, the link may be used for ASI transport streams for use with MPEG compressed video streams or other 270 Mb/s type data.

The transmitter features automatic input cable equalisation. A “keep link alive” signal is available to maintain optical link operation when no electrical input is present.

Two inputs are provided with automatic changeover to input 2 on loss of input 1 for input signal redundancy.

The receiver uses an APD detector with signal conditioning and reclocking circuits. The data rate is automatically set to match the 3G-SDI, HD-SDI or SD-SDI/ASI rates dependent on the actual input data rate to the transmitter.

The IRT-6630-DDT and IRT-6630-DDR are designed to fit the openGear standard 2RU frames which allow a mixture of cards from various manufacturers to be mounted within the same frame.

The DashBoard control software is available as a free download.

NOTE: 1 – 27dB path loss at 3G. Typically >30dB at HD and SD. Fitted with APD detector.

Product by:

IRT Communications IRT specialises in the design, development and manufacture of Digital and Analogue Video / Audio Broadcast and communications products including MPEG, ASI, DVB, AES/EBU, G.703, Distribution Amplifiers (DAs), HDTV and Fibre (Fiber) Optic devices used in telecommunication (ITU) and broadcast centres. Visit irtcommunications.com…