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COMSPHERE 6800 Series Network Management System
2-76 January 1997 6800-A2-GB31-20
Phase jitter 20–300 Hz (Required field)
Enter a high-frequency range phase jitter value that, when exceeded, causes the device to
report a threshold alert. Valid values are from 1 to 45 degrees; or enter ua (unassigned) to
disable the effect of the phase jitter parameter for the specified device(s). The modem will
report a minor alarm if the amount of phase jitter exceeds the value entered in this field.
Frequency offset (Required field)
Enter a frequency offset level value that, when exceeded, causes the device to report a
threshold alert. Valid entries are from 1 to 10 Hz; or enter ua (unassigned) to disable the
effect of the frequency offset parameter for the specified device(s). The modem will
report a minor alarm if the frequency offset level exceeds the value entered in this field.
Non-linear distortion (Required field)
Enter a non-linear distortion value that, when exceeded, causes the device to report a
threshold alert. Valid entries are from 50 to 15 -dBm; or enter ua (unassigned) to disable
the effect of the non-linear distortion parameter for the specified device(s). The modem
will report a minor alarm if the amount of non-linear distortion exceeds the value entered
in this field.
Set CCN event (Required field)
If configuration change notification has been enabled for this modem, use this field to
determine whether or not this configuration change will be reported to the NMS.
Enter yes to report this change to the NMS.
Enter no to prevent this change from being reported to the NMS.
If configuration change notification has been disabled for this modem, configuration
changes are not reported to the NMS regardless of what is entered in this field.
A pop-up menu is available listing valid selections.
Change Thresholds Results Form
The results form lists device information for each device specified, and redisplays the new
threshold values for the specified device(s).
The following fields and their possible values display for the 3910, 3911, 3920Plus, 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.