Exfo VDSL2 Uživatelský manuál stáhnout pdf (Strana 71)

Copper, VDSL2, ADSL2+, and IP Triple-Play Test Set 63

4 POTS Auto Test

The purpose of the POTS Auto Test function is to detect the DC current and

measure the voice frequency in a copper telephone loop. This test allows

you to compare measured results against stored threshold values to

provide pass or fail status results of the POTS circuit type.

To view POTS Auto Test tabs:

From the POTS Auto Test pane use the F1, F2, or F3 key to view the various

tabs.

Thresholds

The Thresholds tab allows you to set threshold values for the

POTS auto test.

Each parameter is described below:

³ Min DC Current (mA) is a value

ranging from 10 to 100. Default is

23.

³ Max Loss (dB) is a value ranging

from 0 to 50. Default is 8.

³ Max VF Power Influence is a value

ranging from -90 to 10 dBm with a

default of -10, if the ITU Standard is used. If ANSI Standard, the range is

from 0 to 100 dBrn with a default value of 80.

³ Max VF Noise is a value ranging from -90 to 10 dBm with a default

of -70, if the ITU Standard is used. If ANSI Standard, the range is from

0 to 100 dBrn with a default value of 20.

³ Min Long Balance (dB) is a value ranging from 0 to 100. Default is 60.

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Exfo VDSL2 Uživatelský manuál Strana 71