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Main / Optical interfaces / PORC-7228

PORC-7228 AA/AE/EE series optical receivers with analog/AES audio output and unidirectional RS-232 data support

PROFLEX™ PORC-7228 series optical receivers convert an optical signal into electrical, suport SDIembedded synchronization to the REF. The optical input of PORC-7228 is based on the hot-swappable SFP module with the RX power monitoring facility.
An audio delay follows video, the SD and HD signal may be used as the REF for synchronization.
The analog/EAS audio output provide the deembedded audio signals.
The auxiliary HDMI output provides the bargraph audio level meter (quazi-peak and UV) OSD.
PORC-7228 module occupies two slots in the PROLFEX 1U/3U racks.

PORC-7228(A)-4 optical receivers are intended to pair with the POTM-7205-4 (if RS-232 communication is nesessary) or any other HD/SD SDI compatible optical transmitters.

Features:

  • HD/SD SDI compliance
  • electrical and HDMI outputs are available simultaneously
  • automatic cable equalizer on SDI input
  • built-in 1kHz test generator
  • built-in color bar generator
  • signal loss indicator
  • EDH/CRC status indicators
  • built-in sync gen lock status indication
  • manual timing adjustment within the ±99 TV lines range
  • automatic detection and indication of an embedded audio in the input SDI signal
  • audio delay follows video
  • audio channel remapping
  • presettable audio gain
  • bargraph audio level meter (quazi-peak and UV) OSD on HDMI monitor output
  • hot-swappable SFP module providing the real-time diagnostic information about RX power
  • compatibility with a single-signal, WDM and CWDM optical systems
  • APD modification available
  • RS-232 up to 150kbps stream extraction
  • analog, AES/EBU or combination of both standards for audio output signals
  • 24 bits DAC

Technical specifications

  • Inputs
    • optical
      Standard compliance SMPTE 292M (HD SDI)
      50i/1920*1080(2640*1125), 1080i/50
      60i/1920*1080(2200*1125), 1080i/60
      25p/1920*1080(2640*1125), 1080p/25
      30p/1920*1080(2200*1125), 1080p/30
      50p/1280*720(1980*750), 720p/50
      60p/1280*720(1650*750), 720p/60
      SMPTE 259M (SD SDI)
      50i/720*576, 625i/50
      60i/720*480, 525i/60
      input connector SFP/LC
      optical sensitivity band 1100~1650nm
      maximum detectable optical input power -3dBm (-9dBm for APD modification)
      Input sensitivity HD SDI -23dBm
      SD SDI -26dBm
      HD SDI,
      APD modification
      -30dBm
      SD SDI,
      APD modification
      -32dBm
    • REF
      input type AC-coupled
      connector type BNC
      signal type for HD SDI tri-level
      for SD SDI composite black-burst, 1V p-p
      input impedance more than 10kOhm
  • Outputs
    • SDI
      connector type BNC
      number of outputs two, reclocked
      return loss better than 12dB at 1.5GHz
      SDI signal rise and fall times 270ps (HD SDI), 700ps (SD SDI)
      jitter less than 0.2UI
      H-timing adjustment advance/delay within half TV line with 37ns (SD SDI) or 13,8ns (HD SDI) increments
      V-timing adjustment advance/delay within 99 TV lines with one TV line increments
      audio gain presets ±6dB with 0.2dB steps
    • HDMI with audio level bargraph OSD
      standard compliance as per input signal standard
      connector type miniHDMI
    • Audio
      • analog
        output type balanced
        output impedance less than 50 Ohm
        connector type DB-15
        0dB FS maximum output level +18dB
        audio gain adjustments ±6dB in 0.2dB increments
        dynamic range 100dB
        THD and noise less than 0.006%
        DAC 24 bits
        sampling rate 48kHz, genlocked to video
      • AES/EBU
        output type transformer balanced
        connector type DB-15
        audio gain adjustments ±6dB in 0.2dB increments
        signal amplitude 3V at 110 Ohm

General description

PORC-7228 accepts the optical signal on it's SFP RX module, which demodulates the input signal down to HD/SD SDI electrical form. SDI is decoded into a 10-bits 4:2:2 stream which is processed by a video/audio processor. The video/audio processor deembedds the audio and synchronizes the streams to the external REF. The HD/SD SDI video is available on two reclocked outputs.

PORC-7228 simplified schematic.

PORC-7228 rear panel view

Controls and indicators

The MODE button toggles through all the modes, the UP and DOWN buttons edit them.

  • INP - input signal format selection
  • BARS - built-in color bar generator ON/OFF
  • ASSIGN A/B GROUP/CH - audio channel outputs mapping (selects a group and a channel to be reembedded into a new output group's channels 1 and 2)
  • GAIN A/B - the audio gain presets in a selected stereo pair or AES signal
  • TON - the built-in 1kHz test tone generator ON/OFF
  • OUT GROUP - a group number select/disable for a remapped audio
  • H/V TIMING - the timing within a TV line/frame relative to the REF signal

Status indicators:

  • EDH/CRC MIN/HOUR - lit if two or more EDH/CRC errors were detected within one hour/minute interval. Both LEDs flash if there is no input video.
  • REF UNLOCK - lit if:
    • no REF input signal present
    • the built-in sync-gen is not locked to the input REF signal
    • the input REF signal is not of the same standard as an input HD/SD SDI
  • LOSS - lit when SDI input is lost
  • BARS - lit when the color bars are being inserted

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.


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