11
Change/Display Thresholds (cht/dst)
The following fields and their possible values display for the 3910, 3911, 3920Plus and 3921Plus
modems:
•
Retrains: 1–255, computed for the last 15 minutes.
•
Gain hits: 1–255, computed for the last 15 minutes.
•
Phase hits: 1–255, computed for the last 15 minutes.
•
Impulse hits: 1–255, computed for the last 15 minutes.
•
Dropouts: 1–255, computed for the last 15 minutes.
•
Receive level (high): Receive level in – dBms. Possible range: 15 to 0.
•
Receive level (low): Receive level in – dBms. Possible range: 50 to 16.
•
Signal/noise: Signal/noise ratio in dB. Possible range: 5 to 40.
•
Phase jitter 20–300 Hz: In degrees (deg). Possible range: 1 to 45.
•
Freq offset: Frequency offset in Hertz (Hz). Possible range: 1 to 15.
•
Non-linear distortion: Non-linear distortion in – dB. Possible range: 50 to 15.
•
Signal quality threshold: An alarm is generated if the measured signal quality is less than
the signal quality threshold. Possible values: excellent, good, fair, poor and no signal.
•
Near echo: Near echo threshold in – dBm. Possible range: 38 to 0.
•
Far echo: Far echo threshold in – dBm. Possible range: 38 to 0.
