EXFO MaxTester 635 - Manual (Page 158)

Noise Tests
150 MAX-635
VF Impulse Noise
VF Impulse Noise Threshold Settings
The Threshold Settings page allows you to set the VF Impulse Noise
Threshold values for the test.

Low Counter Power Detection Level defines the
low threshold limits for the impulse noise test.

Power Separation defines the level difference
between the Low, Mid, and High thresholds.
Specify a value between 1 and 6 dB.

Mid Counter allows you to set the threshold value
for this counter.

Type is the threshold limit of the Mid Counter:
either Maximum or Minimum.

Enabled is a flag to use the current Mid Counter
threshold: either Yes or No.
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 on a value to open a list box of options or the alphanumeric
editor screen and use the navigation keys to scroll through.
4. Press to confirm the value.