
VF / DSL Cable Qualifier
140
EDIT /
SELECT
MAIN
MENU
Test Typ e :
EF
CHG
CROSSTALK OR LOOPBACK
WARNING
Note: telephone cables may have dangerous A.C. or D.C.
voltages on them, therefore caution should be taken when
connecting this test set.
!
SELECT
NEXT
FIGURE 8.8.1A – 4 WIRE CROSSTALK SETUP MENU
The 4-Wire Crosstalk test setup options are described as follows:
TEST TYPE: Select from either CROSSTALK / LOOPBACK or SINGLE FREQUENCY.
CROSSTALK / LOOPBACK will display a plot of the crosstalk. Background loop
noise is rejected.
SINGLE FREQUENCY will display a power level in dB for a user specified
frequency.
FREQUENCY
(kHz):
The Frequency setting is only available when the 4 Wire Crosstalk Test Type is
set to SINGLE FREQUENCY.
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