Exfo FTB-700 for FTB-1 User Manual download pdf (Page 51)

Testing Fibers in Advanced Mode

OTDR 43

Setting Distance Range, Pulse Width, and Acquisition Time

Setting Distance Range, Pulse Width, and

Acquisition Time

The distance range, pulse width and acquisition time are set with the

controls in the Advanced main window.

 Distance: corresponds to the distance range of the fiber span to be

tested according to the selected measurement units (see Selecting the

Distance Units on page 93).

Changing the distance range alters the available settings of the pulse

width and leaves only the settings available for the specified range. You

can select either Auto or one of the predefined values.

You can customize the available distance range values (see

Customizing the Acquisition Distance Range Values on page 95). If you

select Auto, the application will evaluate the fiber length and set the

acquisition parameters accordingly.

 Pulse: corresponds to the pulse width for the test. A longer pulse

allows you to probe further along the fiber, but results in less

resolution. A shorter pulse width provides higher resolution, but less

distance range. The available distance ranges and pulse widths

depend on your OTDR model.

Note: Not all pulse widths are compatible with all distance ranges.

You can select either Auto or one of the predefined values.

If you select Auto, the application will evaluate the fiber type and length

and set the acquisition parameters accordingly.

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Exfo FTB-700 for FTB-1 User Manual Page 51