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Main / Optical interfaces / POTM-3251

POTM-3251 optical transmitters provide the Time Division Multiplexing of up to four SDI or ASI electrical streams to transmit over a single optical wavelength signal. POTM-3251 is intended to pair with the PORC-3271 optical receiver. POTM-3251 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

• up to four electrically multiplexed SDI/ASI streams over single optical fiber
• single optical signal in the WDM/CWDM band
• automatic cable equaliser
• up to eight channels transmitted using two optical MUX in WDM band
• up to sixty four 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

Laser wavelengths:

• POTM-3251/1310 – 1310nm FP laser diode
• POTM-3251/1550 – 1550nm FP laser diode
• POTM-3251-CW## – CWDM DFB laser, 1270~1610nm with 20nm steps (## denotes a wavelength)

Technical specifications

• Electrical input
  

  Standard compliance	SMPTE259M A,B,C,D; DVB/ASI
  Number of inputs	4, 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

• Optical output
  

  Number of outputs	1
  Connector type	FC/PC, 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	1600Mbps

General description

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-3251 rear panel:

Controls and indicators

POTM-3251 frontal panel:

The indicators:

• LOCK 1...4 – lit if there is an input signal on a channel
• LOSS 1...4 – lit when an input signal is lost

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).