EXFO MaxTester 635G User Manual page 243

Sweep Threshold Settings
The Return Loss Sweep Threshold Settings page is
similar to the Single Frequency test and allows you to
set the Loss Threshold for each pair. In addition, you
can select Mask as a threshold and view the Mask
Tolerance. The threshold is a programmable value
you can use as an on-screen indicator in each test
when a measured value is too high or too low.
Type is the threshold limit for each pair. Selecting

Minimum or Maximum acts as the single point P/F
threshold flat mask while selecting Mask provides
a shaped mask as threshold. When Mask is
selected, it will be used as pass/fail criteria next
time the test is run, and Loss Threshold becomes read-only.
Enabled is a flag to use the Return Loss threshold: either Yes or No.

For example, setting the threshold Enabled to No will disable pass/fail
threshold.
Mask Tolerance is a fixed value representing a marginal pass area on

the graph shown in yellow.
To set threshold values:
1. Press the up/down arrow keys to highlight the desired parameter.
2. Press the left/right arrow keys to view and select the options.
OR
3. Press
editor screen and use the navigation keys to scroll through.
4. Press
Copper and G.fast/VDSL2/ADSL2+ Multi-play Test Set
on a value to open a list box of options or the alphanumeric
to confirm the value.
Frequency Tests
Return Loss
233