Optics performance monitoring definitions

 Optics performance monitoring

• Carrier Frequency Offset (MHz)—Carrier frequency offset in megahertz (mHz), which denotes the difference between the carriers (frequency shift in the receive spectrum) between the expected Rx carrier frequency and the actual carrier frequency

  CFO—Threshold values for carrier frequency offset

  CFO-Min—Low threshold setting trigger when the carrier frequency offset falls below this minimum value

  CFO-Avg—Average threshold setting trigger when the carrier frequency offset crosses this average value

  CFO-Max—High threshold setting trigger when the carrier frequency offset rises above this maximum value

• Chromatic Dispersion—Lane or residual chromatic dispersion measured at the Rx transceiver port, which denotes the spreading of the signal in time resulting from the different speeds of light rays

  CD—Threshold values for chromatic dispersion

  CD-Min—Minimum value of the residual chromatic dispersion measured at the Rx transceiver port

  CD-Avg—Average value of the residual chromatic dispersion measured at the Rx transceiver port

  CD-Max—Maximum value of the residual chromatic dispersion measured at the Rx transceiver port

• Differential Group Delay—Lane differential group delay, which denotes the time difference between the fractions of a pulse that are transmitted in the two principal states of polarization of an optical signal. For distances greater than several kilometers, and assuming random (strong) polarization mode coupling, DGD in a fiber can be statistically modeled as having a Maxwellian distribution.

  DGD—Threshold values for differential group delay

  DGD-Min—Minimum value of the differential group delay below which a TC is triggered

  DGD-Avg—Average value of the differential group delay at which TCA is triggered

  DGD-Max—Maximum value of the differential group delay above which a TCA is triggered

• Module Temperature (°C)—Module temperature, which denotes the laser temperature in Celsius

  MT—Threshold values for module temperature

  MT-Min—High laser temperature in Celsius below which a TCA is sent

  MT-Avg—Average laser temperature in Celsius at which a TCA is sent

  MT-Max—Maximum laser temperature in Celsius above which a TCA is sent

• Optical Lane Q2 Factor—Quality (Q or Q2) factor value estimated at the Rx transceiver port

  Lane Q2 factor—Threshold values for the quality factor

  Lane Q2 factor-Min—Minimum value of the quality factor estimated at the Rx transceiver port below which a TCA is sent

  Lane Q2 factor-Avg—Average value of the quality factor estimated at the Rx transceiver port at which a TCA is sent

  Lane Q2 factor-Max—Maximum value of the quality factor estimated at the Rx transceiver port above which a TCA is sent

• Signal to Noise Ratio—Signal-to-noise ratio estimated at the Rx transceiver port

  SNR—Threshold values for signal-to-noise ratio

  SNR-Min—Minimum value of the signal-to-noise ratio estimated at the Rx transceiver port below which a TCA is sent

  SNR-Avg—Average value of the signal-to-noise ratio estimated at the Rx transceiver port

  SNR-Max—Maximum value of the signal-to-noise ratio estimated at the Rx transceiver port above which a TCA is sent

   

  • Optical Tx Output Power—Transmitted laser optical output power in dBm

    Tx-Pwr—Threshold values for transmitted laser output power

    TxPwr-Min—Minimum value of the transmitted laser output power in dBm below which a TCA is sent

    TxPwr-Avg—Average value of the transmitted laser output power in dBM at which a TCA is sent

    TxPwr-Max—Maximum value of the transmitted laser output power above which a TCA is sent

  • Optical Rx Input Power—Received laser optical input power in dBm

    Rx-Pwr—Threshold values for received laser input power

    RxPwr-Min—Minimum value of the received laser input power in dBm below which a TCA is sent

    RxPwr-Avg—Average value of the received laser power in dBm at which a TCA is sent

    RxPwr-Max—Maximum value of the received input power in dBm above which a TCA is sent