Exfo FTB-7000 OTDR for FTB-200 v2 Manual do Utilizador descarregar pdf (Página 179)

Analyzing the Results Manually

OTDR 165

Using Markers

You can use markers to view the position and relative power of an event.

Markers are available from the Events tab (when you modify or add an

event) or the Measure tab in the main window.

To move a marker:

1. Ensure that the button is selected in the zoom button bar.

2. From the Measure tab, press the markers button until it displays the

desired marker. You can also use from the keypad.

In addition to the a, A, B, and b markers, you can also select the All

item.

3. Once the appropriate marker is selected, use the right and left arrow

buttons to move the marker along the trace. You can also move it with

the selection dial located on the front of the unit.

Note: You can also select the marker directly on the trace display and drag it to

the desired position.

If a marker is moved closed to another one, both will move together. This

ensures a minimum distance is maintained between markers.

A marker may disappear from the trace after you zoom in (see Using Zoom

Controls on page 123). You can recall it by selecting a missing marker with

the Markers button or by using one of the arrows to bring the selected

marker back into the displayed area.

Power at A

Distance between

span start and B

Power at B

Distance between A

and B

Power difference

between A and B

Distance between

span start and A

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Exfo FTB-7000 OTDR for FTB-200 v2 Manual do Utilizador Página 179