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Main / Optical interfaces / POTM-3252
| POTM-3252 series 8-channel STM16/SDH multiplexed SDI/ASI optical transmitters |
POTM-3252 optical transmitters provide the TimeDivisionMultiplexer of up to eight SDI or ASI electrical streams and one RS-422 to transmit over a single optical wavelength signal. POTM-3252 is intended to pair with the PORC-3272 optical receiver. The POTM-3252-STM modification conforms with the STM-16, ITU G.707 specification. POTM-3252 module occupies two slots in the PROLFEX 1U/3U racks so that up to two transmitters 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
- automatic cable equaliser
- built-in SDI test signal generator (color bars, pathologic pattern, white/black field)
- up to sixteen channels transmitted using two optical MUX in WDM band
- up to one hundred twenty eight channels transmitted using sixteen optical MUX in CWDM band
- signal loss indication
- fault tolerant transmission - loss of any electrical input signals does not affect the remaining
- main and optional stand-by laser (SFP)
Laser wavelengths:
- POTM-3252/1310 – 1310nm FP laser diode
- POTM-3252/1550 – 1550nm FP laser diode
- POTM-3252-CW## – 1270~1610nm with 20nm steps, CWDM DFB laser (## denotes a wavelength)
Technical specifications
- Electrical input
| Standard compliance |
SMPTE259M A,B,C,D; DVB/ASI |
| Number of inputs |
8, reclocked |
| Input impedance |
75 Ohm |
| Return loss |
better than 18dB up to 270MHz |
| Connector type |
BNC |
| Cable equalisation |
up to 300m of Belden1694A cable or similar |
| Connector type |
BNC |
| REF input |
2.048MHz (-STM modification only) |
- Optical output
| Number of outputs |
2, the main output and the optional stand-by |
| Connector type |
LC (SFP), single-mode fiber |
| Laser wavelengths |
1310±20nm FP laser (1550±20nm DFB laser by request) |
| Laser wavelengths CWDM systems |
1270~1370nm, 1430~1610nm with 20nm, DFB laser |
| Optical power |
0dBm |
| Datastream throughput |
2488.32Mbps (STM16, ITU G .707 compliant, for -STM modification) |
General description
POTM-3252 simplified schematics:
An input SDI or DVB/ASI signals are serialized by means of the TDM (TimeDivision Multiplexing). The serialized data is converted into an optical signal of a single wavelength which is available at the optical output.
POTM-3252 rear panel:
Controls and indicators
POTM-3252 frontal panel:
The controls:
- TEST SEL – the type of the test-signal selection button
- CHANNEL – the channel number selection button to insert a test-signal to
- ON / OFF – test-signal ON/OFF in a selected channel
The indicators:
- REF – lit when the reference 2.048MHz is present
- LASER FAULT MAIN / STBY – lit if a malfunction with the main or stand-by laser is detected respectively
- TEST SEL BARS/PATHOLOGIC/ WHITE / BLACK – test-signal type indication ("color bars" = 1, "pathologic pattern" = 2, "white field" = 3, "black field" = 4)
- TEST SEL ON/OFF – lit when a test-signal is being inserted into a channel
- INP 1…8 – lit when a valid SDI/DVB-ASI signal is present on an input
Note: when a test-signal is being inserted into a channel - respective INP# indicator lits.
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). |
