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Main / Optical interfaces / PORC-3271

PORC-3271 optical receivers provide the Time Division deMultiplexing of up to four SDI or ASI electrical streams received over a single optical wavelength signal. PORC-3271 is intended to pair with the POTM-3251 optical transmitter. PORC-3271 module occupies one slot in the PROLFEX 1U/3U racks so that up to four receivers fit into a 1U rack and up to fifteen into a 3U rack.

Features

• up to four electrically multiplexed SDI/ASI streams over single optical fiber
• single optical signal in the WDM/CWDM band
• up to eight channels received using two optical DEMUX in WDM band
• up to sixty four channels received using sixteen optical DEMUX in CWDM band
• signal loss indication
• fault tolerant reception - loss of any electrical input signals does not affect the remaining
• CRC/EDH status indication

Technical specifications

• Optical input
  

  Number of inputs	1, reclocked
  Photodiode type	InGaAs/InP PIN photodiode
  Optical sensitivity band	1100~1650nm
  Maximum optical input power	-3dBm
  Optical dynamic range	-28 ~ -3dBm
  Data throughput	1600Mb/s
  Optical connector type	FC/PC

• Electrical output
  

  Standard compliance	SMPTE259M A,B,C,D; DVB/ASI, as per optical input
  Number of outputs	4, reclocked
  Output impedance	75 Ohm
  Return loss	better than 18dB up to 270MHz
  Connector type , signal amplitude	BNC, 800mV
  Signal rise/fall time, jitter	700ps, 0.2UI
  Connector type	BNC

General description

An input optical signal of a single wavelength is detected and converted into electrical form. An electrical signal is deserialized by means of the TDM (TimeDivision deMultiplexing) and up to four SDI or DVB/ASI signals are recovered. These signals are available at electrical outputs.

PORC-3271 rear panel:

Controls and indicators

PORC-3271 frontal panel:

The indicators:

• LINK LOCK – lit if there is valid input optical signal
• LINK LOSS – lit when an optical signal is lost
• CRC MIN – lit if there was a CRC error in the DVB/ASI stream during a last minute interval
• CHANNEL 1...4 – lit if a valid SDI or DVB/ASI data stream is detected in a TDM slot
• LOSS 1...4 – lit when there is no data or a PLL cannot lock on a channel's stream

The controls:

• CRC RESET – press this button to reset the CRC status

The remote control and management from a PC

All the “PROFLEX” modules are remote controllable from a PC. This facility is available if a rack is fitted with a CPU module (ordered separately).