EXFO MaxTester 635 - Manual (Page 161)

Noise Tests
Copper and VDSL2/ADSL2+ Multi-play Test Set 153
WB PSD Noise

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.

Zoom references the middle of the x/y axis and not the cursor
position. Press the arrow keys as follows:
Right = x-axis zoom in.
Left = x-axis zoom out.
Up = y-axis zoom in.
Down = y-axis zoom out.

Pan - use left/right arrow keys to pan the x-axis and the up/down
arrow keys to pan the y-axis.

1:1 resets the x-axis and y-axis limits to full scale.

Return To Test removes these function keys and displays the
previous ones.

Result displays the following wideband PSD noise test results
differentiating the Current trace from the Peak hold.

Max PSD reading among all frequency bins for the Current results.

Frequency bin where Max PSD for the Current results are
detected.

RMS Noise reading for the Current results including a pass/fail
status.
If Peak Hold is ON:

Max PSD Peak reading among all frequency bins.

Frequency bin for Max PSD Peak.

Test Status displays the current state of measurement or an error
message.