12
Circuit Quality (cq)
The following fields 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.
•
Impulse hits: 0–255, computed for the last 15 minutes.
•
Dropouts: 0–255, computed for the last 15 minutes.
•
Signal quality: Possible values: excellent, good, fair, poor and no signal.
•
Near end echo: Possible range: >0.0 to <-102.3 dBm.
•
Far end echo: Possible range: >0.0 to <-102.3 dBm.
•
Far end delay: Far end delay in milliseconds (msec).
•
Echo freq offset: Possible range: <-51.1 to 51.1 Hz.