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Main / Optical interfaces / PORC-3242
| PORC-3242 series SDI/DVB-ASI optical receivers |
PORC-3242 optical receivers convert an optical signal into electrical SDI/ASI 270Mbps stream.
PORC-3242 module occupies one slot in the PROLFEX 1U/3U racks so that up to four transmitters fit into a 1U rack and up to fifteen into a 3U rack.
Features
- Automatic input signal's standard detection with manual override option
- EDH status indicators
- Signal loss indication
- Signal reclocking
- PAL/NTSC monitor output (for SDI input standard)
- High optical sensitivity (-31dBm for SDI/ASI)
- Two output BNC connectors for the reclocked signal
Technical specifications
- Input
- Optical input
| Supported standards |
SMPTE259M A,B,C,D, DVB/ASI |
| Number of inputs |
one, reclocked |
| Photodiode type |
InGaAs/InP PIN |
| Optical sensitivity band |
1100~1650nm |
| Max input optical power |
-3dBm |
| Optical dynamic range |
-31~-3dBm (for SDI input signal standard) |
| Optical connector type |
FC/PC |
- Output
- Electrical output (digital)
| Output signal standard |
as per optical input signal standard |
| Number of outputs |
two, reclocked |
| Return loss |
better than 18dB at 270MHz |
| Signal amplitude |
800mV±10% |
| Connector type |
BNC |
| Signal rise and fall time |
700ps |
| Jitter |
less than 0.2UI |
- PAL/NTSC monitor output (for SDI input standard)
| Number of outputs |
1 |
| Output impedance |
75 Ohm |
| Signal amplitude |
1000mV at 75 Ohm |
| Diff. gain, diff. ampl. |
less than 3% |
| Frequency response ripple |
less than 2% to 5.5MHz |
| Connector type |
BNC |
General description
An input optical signal is applied to the photodiode, converted into electrical form and amplified. After the reclocking and reshaping, the signal is available at the BNC electrical output. A copy of restored signal is processed to recover the DVB-ASI or SDI stream. For the SDI stream the EDH status is collected, the PAL/NTSC video is decoded for monitoring.
PORC-3242 rear panel view.
Controls and indicators
All the controls and indicators are located at the module's frontal board
Modes of operation:
- AUTO – automatic input signal standard selection
- FORCE – manual override of input standard selection
- RESET EDH – EDH counters reset
Indicators:
- LOSS – lit when no input signal is detected
- EDH DET – lit when an SDI signal with the EDH is present
- EDH MIN/HOUR – lit when two or more EDH errors were detected within one hour/one minute interval
- ASI,SDI - input signal standard indication
Remote control from a PC
All “PROFLEX”-family devices are capable of a remote control from a PC via a PROFITT's proprietaty software packege. An optional CPU module installed in a PROFLEX rack provides the RS-232/RS-485/Ethernet connectivity.
Application example
In case of a single-fiber usage, just connect it to the receiver's input.
In case of the CWDM you should connect the receivers' inputs to an optical MUX/DEMUX observing the wavelength markings. PORC-3242 is sensitive to any wavelength in the 1100..1650nm band, it is possible to connect it to any MUX/DEMUX output to provide optical signal selectivity.
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