IRT-6630-DTR
I.R.T. Communications Pty Ltd | www.irtcommunications.com
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Revision 01
GENERAL DESCRIPTION
The IRT-6630-DTR is a transmit/receive (transceiver) module 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 section 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 section 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-DTR can be used as an independent transmitter and receiver at the same time allowing bi-directional
operation over two single mode fibres. Being independent from each other, the transmit and receive signals can be
of mixed signal types.
Optionally a 1310/1550nm WDM
2, 3
optical combiner can be fitted to allow for combined use on a single fibre.
The IRT-6630-DTR is 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.
Standard features:
•
Transports 3G-SDI, HD-SDI, SD-SDI or ASI signal rates.
•
Single or bi-directional operation possible with independent transmit and receive functions on the
one card.
•
Path lengths up to 30 dB
1
optical path loss using 9/125μm single mode fibre.
•
Automatic changeover switching of input for signal redundancy on Tx.
•
Optional on-board WDM
2, 3
optical combiner for use on a single common fibre.
•
DashBoard™ software monitoring and control.
NOTE: 1
27dB path loss at 3G. Typically >30dB at HD and SD. Fitted with APD detector.
2
With WDM option fitted for combined use on a single fibre, optical path loss is reduced by
approximately 2dB.
3
With WDM option fitted, when operating as a pair, one IRT-6630-DTR must be fitted with a
1310nm laser and the other a 1550nm laser.
BLOCK DIAGRAM IRT-6630-DTR SIGNAL PATH
Fibre Link
9-27dB path loss at 3G
(>30dB at HD and SD)
IRT-6630-DTR
(Tx/Rx)
I/P 1
I/P 2
Fibre O/P
Fibre I/P
O/P 1
O/P 2
IRT-6630-DTR
(Tx/Rx)
O/P 1
O/P 2
Fibre I/P
Fibre O/P
I/P 1
I/P 2
3G-SDI
HD-SDI
SD-SDI
ASI
3G-SDI
HD-SDI
SD-SDI
ASI
3G-SDI
HD-SDI
SD-SDI
ASI
3G-SDI
HD-SDI
SD-SDI
ASI
