Digicom 3910, 3911 - page 136

COMSPHERE 3900 Series Modems
7-16 September 1998 3910-A2-GN32-40
To correct the invalid VF threshold, press the key to return to the VF Threshold
Edit/Save/Reset screen.
F1
VF Thresholds
Edit Save Reset
F2 F3
Select Reset to restore the original default values into memory.
Repeat the Edit and Save procedure until the VF threshold(s) is valid and the Save completes
successfully (Save Completed).
To exit this function and remain in the Control branch, press the key. To exit and return to
the Top-Level menu, press the key.
Table 7-1
Valid Ranges for VF Thresholds
VF Thresholds Valid Ranges Default Values
Receive Signal Level High 0 dBm to –15 dBm Above –9 dBm
Receive Signal Level Low –16 dBm to –50 dBm Below –23 dBm
Signal to Noise Ratio 5 dB to 40 dB Below 23 dB
Non-Linear Distortion 15 dB to 50 dB Below 30 dB
Retrains 1 to 256 trains 15 trains per 15 minutes
Signal Quality Excellent (lowest)
Good
Fair
Poor
No Signal (highest)
Good
Near Echo 0ā—38 dBm Above –20 dBm
Far Echo 0—38 dBm Above –20 dBm