VeEX OTDR FX150+ Series, Руководство пользователя

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OTDR Series e-Manual, D07-00- 076P -RevD00 Page 85 of 109
7.7 Measure Mode
There are several methods available to manually measure fiber characteristics. Prior to
performing manual measurements, it is important you become familiar with the Markers and
Zooming capabilities of the unit.
7.7.1 Markers Controls
Markers are provided to measure distances accurately. Depending on measurement mode and
viewing window, one or more markers are at the User’s disposal. The Markers can be moved
using the touchscreen or using the left/right buttons on the rubber keypad (not available on
MTTplus or FX150).
The Markers display the following:
• Distance from the start of the trace to Marker “A”
•
Distance from the start of the trace to Marker “B”
•
Distance in between Marker “A” and Marker “B”
As you move the Markers, the distance information updates
automatically.
The active Marker is depicted by two small arrows pointing inwards at the base of the Marker
The Marker is divided into a thick (bottom) and thin (top) line. To move Marker A or Marker B
individually, select and drag the Marker on the thin portion of the marker. To move both
Markers together, select and drag any Marker on the thick portion of the line.
If the Markers appear off screen, use the Markers button on the right side bar to bring and
display the Markers on screen.
If a marker is moved too close to another, both will move together to ensure minimal distance
between them.
The markers can be moved separately as well as in pair (or 5 markers simultaneously in the
LSA attenuation measuring mode).
At the top part of the screen next to the markers, the position of the marker with respect to the
beginning of the optical fiber is indicated in kilometers, miles or feet.
In the data line at the bottom of the screen you will see the parameters of the trace
corresponding to the markers’ position and measurement mode.