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IM AQ1200-01EN
W
aveform Analysis
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App
Index
20
5 Point Markers
This mode is only enabled when the Marker Mode is set to Line. The Instrument uses the following
five points to perform the measurement: the near-end point (n), a point (N) that is used to calculate the
near-end side’s approximated line, a point (E) where splice loss is detected, a point (F) that is used to
calculate the far-end side’s approximated line, and the far-end point (f). At the position of marker E, the
level difference between the approximated line n–N and the approximated line F–f is calculated as the
splice loss.
n
N
f
F
a
b
c
e
f
Approximated line F–f
Approximated line n–N
E
Splice loss:
Return loss:
b
c
b/c
dB
km
dB/km
a dB
e
n – E
E – f
f
e/f
dB
km
dB/km
• The measured loss value differs depending on the specified approximation method.
• Set the correct position for the E line. The splice loss changes greatly depending on the position of E.
Distance Reference
Normally, the location where the Instrument and the optical fiber are connected is the measurement
reference point. This reference point is the distance reference. It is used to calculate the distance to
the cursor and markers. If you are using a dummy fiber to perform measurements, move the distance
reference the length of the dummy fiber before performing measurements.
Cursor Link (Moving all markers together)
You can move all markers while maintaining the distance between them.
6.1 How to Operate the Cursor and Markers
