EXFO OTDR 2 - Manual (Page 47)

Preparing Your OTDR for a Test
OTDR 39
Setting Pass/Fail Thresholds
Setting Pass/Fail Thresholds
You can activate and set Pass/Fail threshold parameters for your tests.
Thresholds values are saved with the measurement file. It is possible to
view these thresholds values even if you open the file on another unit.
You can set thresholds for splice loss, connector loss, reflectance, fiber
section attenuation, span loss, span length, and span ORL. You can apply
the same pass/fail thresholds to all test wavelengths or set different
thresholds for each available test wavelength.
These pass/fail thresholds will be applied to the analysis results of all newly
acquired traces as well as current traces with the corresponding
wavelength.
If you work with files containing other wavelengths, the application will
automatically add these wavelengths to the list of available wavelengths.
You will then be able to define thresholds for these new wavelengths. You
can revert all thresholds to their default values.
The loss, reflectance and attenuation thresholds that you set are applied to
all events where such values can be measured.
Once the thresholds are set, the application will be able to perform
Pass/Fail tests to determine the status of the results (pass or fail).
Values that are greater than the predefined thresholds are displayed in
white on a red background in the Events table. Span length, span loss and
span ORL values are displayed in the Summary table.