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Main / Optical interfaces / PORC-3272
| PORC-3272 series 8-channel TDM SDI/ASI optical receivers with RS-422 data support |
PORC-3272 optical receivers provide the Time Division deMultiplexing of up to eight SDI or ASI electrical streams received over a single optical wavelength signal. PORC-3272 is intended to pair with the POTM-3252 optical transmitter. PORC-3272 module occupies two slots in the PROLFEX 1U/3U racks so that up to two receivers fit into a 1U rack and up to eight into a 3U rack.
Features
- up to eight electrically multiplexed SDI/ASI streams over single optical fiber
- single optical signal in the WDM/CWDM band
- up to sixteen channels received using two optical DEMUX in WDM band
- up to one hundred twenty eight 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
- automatic changeover to a stand-by optical fiber on the main input signal loss
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Technical specifications
- Optical input
| Number of inputs |
2, main and optional stand-by, reclocked |
| Photodiode type |
InGaAs/InP PIN photodiode |
| Optical sensitivity band |
1100~1650nm |
| Maximum optical input power |
-3dBm |
| Optical dynamic range |
-18 ~ -3dBm |
| Data throughput |
2488.32Mb/s |
| Optical connector type |
LC (SFP) single-mode fiber |
- Electrical output
| Standard compliance |
SMPTE259M A,B,C,D; DVB/ASI, as per optical input |
| Number of outputs |
8, 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 |
| RS-422 output |
up to 1Mbps |
General description
PORC-3272 simplified schematics:
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-3272 rear panel:
Controls and indicators
PORC-3272 frontal panel:
The controls:
- IN USE MAIN – manually selects the main optical input
- IN USE STBY – manually selects the stand-by optical input
- AUTO – automatically selects an active optical input
- MON – press this button to select any of eight channels to the monitor output
The indicators:
- LOSS – lit when an optical signal is lost on an input (main or stand-by respectively)
- INP – lit if there is a valid optical signal on an input (main or stand-by respectively)
- CRC – lit if a there was an CRC error whithin the last minute interval
- OUT 1..8 – lit when there is a valid SDI or DVB-ASI stream within a channel
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). |
