|
The IRT DDT-4620 and DDR-4620
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 using 9/125µm 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 provided 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. The unit can be configured with lasers of various wavelengths.
LED indicators are provided for digital signal presence, DC power and LASER output power out of range.
A link selectable "keep link alive" signal is available to maintain optical link operation when no electrical input is present.
|
The receiver uses a choice of either a PIN photodiode or APD
detector with signal conditioning and a reclocking circuits. The data
rate is automatically set to match the 3G-SDI, HD-SDI or SD-SDI rates
dependent on the actual input data rate to the transmitter.
Two serial digital outputs are provided. LED indicators are provided for digital signal presence, signal type, optical loss and power.
Relaycontact outputs are also provided for external use of alarm signals on both modules.
An optional SNMP (Simple Network Management
Protocol) plug-in module is available, for each unit,
for remote monitoring when used in conjunction with
an IRT frame fitted with SNMP capability.
The DDT-4620 and DDR-4620 are Eurocard
modules designed to fit IRT's current range of 1RU 1000 series and 3RU 4000 series Eurocard frames.
|
