5.5 POTS (VF) (Optional Features)
5.5.1 Noise
To access
Noise
go to
POTS (VF) > Noise
.
When this measurement is selected, a message screen will appear prompting you to connect TIP1, RING1 and the Ground test leads.
1.
Noise:
Measure the background noise on a cable pair. To preform this measurement, there must be a quiet termination or open
at the end of the cable pair. It is measured in dBrn (decibels relative to noise). dBrn=dBm+90. First press '
Noise
(V) then
'
Measure
'.
2.
Power Influence:
is noise to ground measurement that measures noise from sources such as induced AC voltage from power
utility lines. It is displayed in the
Power Influence
box. First press '
Power Infl
.' then '
Measure
'.
3.
Balance:
Displays
CALC. BALANCE.
This is the difference between Power Influence and Metallic Noise. After obtaining
measurements for Noise and Power Influence, press '
Balance
', then press '
Measure
'.
MTTplus-_Test_Module
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