EXFO CableSHARK P3 VF/DSL Cable Qualifier - Manual (Page 152)

VF / DSL Cable Qualifier
140
EDIT /
SELECT MAIN
MENU
Test Type :
E F 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
F IGURE 8.8.1A – 4 W IRE C ROSSTALK S ETUP M ENU
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.