Next, Spot – EXFO MaxTester 635 User Manual
Page 169
Noise Tests
Copper and VDSL2/ADSL2+ Multi-play Test Set
161
NEXT
NEXT
The NEXT test measures the Near End Crosstalk (NEXT) between 2 pairs of
cables. The test transmits a signal on the T/A - R/B pair, and measures the
received crosstalk on T1/A1 - R1/B1 pair.
Spot
Spot is a continuous mode of operation measuring
the crosstalk for a specific frequency selected by you,
similar to the method used by the Send Tone test. The
Spot function displays and updates results in real
time, until you stop the test. The last valid results then
remain displayed.
Current Group is the current test group name, for
example Noise Tests.
Current Test displays the test being measured.
Here you can switch to another Noise test from
the given list. However, this action will terminate
the ongoing measurement test.
Frequency allows you to set the frequency value for the Near End
Crosstalk (NEXT).
Frequency Step lists a choice of frequency step values.
Termination Resistance lists a choice of resistance values for the
termination of the signal.
Show hookup diagram on test setup - If Yes, the Confirmation page is
prompted before every NEXT test is started. Select No to hide the
diagram next time you run the test.