Instructions

930XC-20C • 930XC-20M • 930XC-30F • 930XC-30P
Tempo Communications Inc. 1390 Aspen Way • Vista, CA 92081 USA • 800-642-2155
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Greenlee / A Textron Company
Information Subwindows
Trace Display Window
Click “Open…” under the “File” menu to open a trace le, and a trace curve will display in the
trace display window (Figure 7-11). The x-axis displays the distance (km); the y-axis represents
the backscatter power (dB). There are two markers, A and B; click either one to activate it. To
move the marker, click and drag with the mouse pointer; the position information will change
accordingly. By moving the marker, the horizontal distance and vertical power can be read
manually. Zooming in and out of the trace features depends on the activation of a marker. In
Figure 7-11 below, the sloped line represents backscatter from the optical ber. The peaks are
reective events in the ber chain. The end of the ber is shown by the sudden drop in optical
power, which is followed by noise. The symbols at the bottom of the window indicate the type of
event.
Figure 7-11. Trace Display
Events List Window
Trace data collected by the 930XC will be processed automatically, and analysis results will be
displayed in the events list (Figure 7-12).
Figure7-12.EventsList
The events list contains the following items:
• No.: Sequence of events in optical ber chain.
• Type: Beginning, end, reection, and non-reection event.
• Distance: Distance from OTDR to event point.
• ReectionValue:Value of reection event.
• InsertionLoss:Vertical decline of dB.
• AttenuationCoefcient:Value of attenuation per kilometer between current event point and
previous event point in optical ber chain.
• CumulativeLoss:dB value of loss from 0 km to current event point.
• Dist.Prev.(km):Distance from the previous event.
Section 7