Digicom 3911, 3910 operation manual Valid Ranges for VF Thresholds Default Values

COMSPHERE 3900 Series Modems

To correct the invalid VF threshold, press the key to return to the VF Threshold Edit/Save/Reset screen.

VF Thresholds

Edit	Save	Reset
F1	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
	Good
	Fair
	Poor
	No Signal	(highest)
Near Echo	0 — 38 dBm		Above –20 dBm
Far Echo	0 — 38 dBm		Above –20 dBm

7-16 September 1998 3910-A2-GN32-40