EXFO MaxTester 635 - Manual (Page 194)

Frequency Tests
186 MAX-635
WB Attenuation

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 Results removes these function keys and displays the
Attenuation page.

Result displays the Cable Length, Elapsed Time, pass/fail status, and
test results in graphical format.

Test Status displays the current state of measurement or an error
message.
To select the parameter 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 on a value to open a list box of options.
4. Press to confirm the value.