EXFO MaxTester 635 - Manual (Page 193)

Frequency Tests
Copper and VDSL2/ADSL2+ Multi-play Test Set 185
WB Attenuation
WB Attenuation
Attenuation
The WB (wideband) single-ended attenuation test
allows you to calculate the dissipation of power of a
transmitted signal as it travels over the copper line.
This test is performed from one end of the cable and
does not require a remote second device. The test
does require an out-of-service wire pair that is open at
the far end. Faults should be repaired first.

Current Group is the current test group name, for
example Frequency Tests.

Current Test displays the test being measured.
Here you can switch to another test from the given
list. However, this action will terminate the
ongoing measurement test.

Bandwidth allows you to select the bandwidth of the frequency range
for the test. Available frequency bandwidths are: 2.2 MHz, 8 MHz, 12
MHz, 17.6 MHz, and 30 MHz.

Threshold Settings button opens a new page that allows you to set the
Attenuation threshold.

Cable Setup button opens a new page that allows you to set Cable
Parameters for the Current Test.

Select Graph button changes to Graph Selected when pressed and
opens a new selection of function keys which allow you to maneuver
the graph as follows:

Cursor - press the left/right arrow keys to decrease/increase the
values by moving the cursor. Press and hold the left/right arrow
keys to accelerate the cursor. Press
to recall the cursor and
place it in the middle of the current x-axis limits.