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COMSPHERE 6800 Series Network Management System
2-86 January 1997 6800-A2-GB31-20
This results form contains the following fields:
Receive level
Displays the measure received signal level (in dBm).
Signal/noise
Displays the measured signal-to-noise ratio (in dB).
Non-linear distortion
Displays the measured non-linear distortion (in dB).
Retrains
Displays the number of retrain counts during the last 15 minutes.
Signal quality
Displays the measured signal quality. Possible values are excellent, good, fair, poor, no
signal.
Near end echo
Displays the echo (in dBm) measured at the near end device.
Far end echo
Displays the echo (in dBm) measured at the far end device.
Far end delay
Displays the delay (in milliseconds). Maximum delay is 1 1/2 seconds.
Echo freq offset
Displays the measured echo frequency offset (in Hz).
The following fields and their possible values display for the 3910, 3911, 3920Plus and 3921Plus
modems:
• Receive level: Possible range: –204.7 to +204.7 dBm.
• Signal/noise: Possible range: <0.0 to >102.3 dB.
• Phase jitter 20–300 Hz: Possible range <0.0 to >99 degrees.
• Freq offset: 1–10 Hz.
• Non-linear distortion: Possible range: >0.0 to <-102.3 dB.
• Retrains: 0–255, computed for the last 15 minutes.
• Gain hits: 0–255, computed for the last 15 minutes.
• Phase hits: 0–255, computed for the last 15 minutes.