EXFO VDSL2 - Manual (Page 116)

Wideband Tests
108 AXS-200/635
PSD Noise
PSD Noise
The PSD Noise tab allows you to view
results of the wideband PSD noise test
in graphical and text form.
The list and buttons on the pane are
described below:
³
(Zoom function List) allows you to
select the desired zoom function:
Horizontal Zoom or Vertical
Zoom. The selected function is
displayed in the box.
³
Zoom In allows you to increase the level of zoom for the selected
zoom function.
³
Zoom Out allows you to reduce the level of zoom for the selected
zoom function.
³
Peak allows you to measure the peak PSD noise value, compare it
against the previous value, and display the maximum value. This
button is only available when the test is running. Toggle between Peak
and Normal.