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FIBRE OPTIC
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Fibre Optic ASI
/ SDI / 270Mb/s
DDT-4210/DDR-4211
Single Channel 270Mb/s
ASI/SDI Fibre Optic Link
DDT-4220/DDR-4225
4 Channel 270Mb/s ASI/SDI
Fibre Optic Link
HDT-4611 / HDR-4611
High Definition TV Fibre
Optic Link
DDT-4210 /
DDR-4211
270 Mb / ASI / SDI Fibre Optic Link
Features:
- Transports 270
Mb/s signals, such as ASI, SDI, etc.
- Path lengths
up to 31dB optical path loss using 9/125µm single mode fibre.
- Passes SMPTE
259M 270 Mb/s SDI pathological test sequence.
- LED indicators
and external alarm contacts.
- Fibre, video
and alarm connections at rear.
- Optional
plug-in SNMP monitoring module.
- Eliminates
ground loop problems.
General
The IRT DDT-4210 transmitter and
DDR-4211 receiver are modules designed principally for use as a 270 Mb/s
SMPTE/EBU serial digital video fibre optic transmission link, using
9/125µm single mode fibre, with optical paths losses up to 31dB.
The transmit / receive system specifications apply to all signal
conditions, including the SMPTE 259M pathological test sequence.
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. On board
links may also be set to transport STM-1 (155 Mb/s) type signals.
The transmitter features automatic input cable equalisation and a choice
of plug-in LASER modules of various wavelengths (ordered separately).
LED indicators are provided for digital signal presence, DC power and
LASER output power out of rang
The DDR-4211 receiver uses a PIN
photodiode detector with signal conditioning and reclocking circuits.
The data rate is factory set for 270 Mb/s operation. Link settings allow
STM-1 data rates (electrical and optical) to be set for interfacing with
IRT's STM-1 interface cards.
Two serial digital outputs are provided. LED indicators are provided for
digital signal presence and power.
Relay contact 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 IRT's 4000 series frame fitted with SNMP capability.
The DDT-4210 and DDR-4211 are Eurocard modules designed to fit IRT's
standard Eurocard frames as well as IRT's 4000 series frames for use
with IRT's SNMP system and may be used alongside any other of IRT’s
analogue or digital Eurocards.
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DDT-4220 / DDR-4225 270Mb/s / ASI / SDI 4
Channel MUX Fibre Link
Features
- 270 Mb/s
type signals, such as ASI and SDI, capability.
- Automatic
cable equalisation for up to 200m on each input.
- Maximum
optical path loss of 32dB.
- External
urgent and non-urgent alarms for system monitoring.
- Optional
plug-in SNMP monitoring module.
Applications:
-
Multichannel digital with data on a single fibre.
- Upgrade
capacity of existing fibre.
- Maintain
timing between related signals by ensuring same path
transmission delay
General
The DDT-4220 accepts up to four 270
Mb/s input signals which may be ASI, SDI or a mixture of each type. The
signals need not be phase or frequency synchronous.
The signals are time division multiplexed into a single 1.302 Gb/s
stream and transmitted via single mode fibre to the DDR-4225 receiver,
which performs the reverse operation and restores correct 270 Mb/s
timing.
In addition to the four 270 Mb/s channels, a single RS422 channel is
included for transmission of auxiliary data at rates of up to 9600 baud.
The DDT-4220/DDR-4225 optical system is primarily designed for use with
a 9/125µm single mode fibre and will allow an optical path loss from 4dB
up to 32dB.
An optional Simple Network Management
Protocol (SNMP) plug-in module is available for remote monitoring of
input and output status and alarm states.
The DDT-4220 transmitter comes available with a choice of standard
1310nm laser (order code DDT-4220/1300) or a DFB 1550nm laser (order
code DDT-4220/1550). Other wavelengths are available on request. The
DDR-4225 receiver is the same regardless of transmitter wavelength.
The modules are designed to fit IRT’s standard Eurocard frames as well
as IRT’s 4000 series frame
for use with IRT’s SNMP system and may be used alongside any other of
IRT’s analogue or digital
Eurocard.
 Click
here to view data sheet
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HDT-4611 / HDR-4611 High Definition TV Fibre Optic
Link
Features
- One type covers 1.485
Gb/s High Definition or 270 Mb/s data signals.
- Work reliably over 5 -
31 dB optical path range using 9/125µm single mode fibre.
- Passes SMPTE 292M
pathological test sequence at 1.485 Gb/s and 270 Mb/s data.
- LED indicators and
external alarm contacts.
- Fibre, video and alarm
connections at rear.
- Optional plug-in SNMP
monitoring module.
General
The IRT HDT-4611 and HDR-4611 are transmit
and receive modules designed principally for use as a SMPTE292M 1.485 Gb/s
serial digital video fibre optic transmission link, using 9/125µm single
mode fibre for path lengths with path attenuation of 5- 31dB. 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. The transmit / receive system specifications apply to all signal
conditions, including the SMPTE292M pathalogical test sequence.
The HDT-4611 transmitter features an input circuit with automatic cable
equalisation for Belden 8281 (or equivalent) coaxial cable followed by a
plug in laser transmitter.
The HDR-4611 receiver uses a plug in APD detector preamplifier module,
signal conditioning and a reclocking circuit for the 1.485 Gb/s data rate,
or for 270 Mb/s SDI and ASI signals. Two in phase serial digital outputs are
provided from the transmission link on the rear assembly.
On the HDT-4611 transmitter LED indicators
on the front panel indicate the presence of signal, loss of laser power and
presence of DC power. Relay contact outputs for remote indication will
indicate failure of the laser operation, loss of input signal, and loss of
power.
On the HDR-4611 receiver LED indicators on the front panel indicate PLL lock
at 1.485 Gb/s or 270 Mb/s operation, locked signal presence, optical input
failure, and presence of DC power. Relay contact outputs for remote
indication will indicate loss of signal, loss of optical input, and loss of
power.
An optional SNMP (Simple Network Management Protocol) plug-in module is
available, for each unit, for remote monitoring when used in conjunction
with IRT's 4000 series frame fitted with SNMP capability.
The HDT-4611 and HDR-4611 are Eurocard modules designed to fit IRT's
standard Eurocard frames as well as IRT's 4000 series frames for use with
IRT's SNMP system and may be used alongside any other of IRT’s analogue or
digital Eurocards.
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