YOKOGAWA AQ7260 OTDR, User Manual, Page: 339 / 442

Chapter 7 USING USEFUL FUNCTIONS
7-44
Analyzing the Subtract Trace
This section explains how to set markers A and B on the subtract trace and calculate the
loss occurring between those marker points.
1.
Locate the cursor to the position to which marker A is to be set.
2.
Press [F3] (MARKER A).
Marker A will appear at the cursor position.
3.
Locate the cursor to the position to which marker B is to be set.
4.
Press [F4] (MARKER B).
Marker B and analysis results will appear at the cursor position.
Marker A:
1
km
Marker B:
2
km
Subtract trace
3
dB
4
dB/km
5
dB
1
Distance from distance reference to marker A
2
Distance from distance reference to marker B
3
Loss between points A and B on the target trace
4
Loss per km between points A and B on the target trace
5
Return loss between points A and B on the target trace
Analyzed by approximate method of reference trace.
It is not possible to save the subtract trace and analysis results.
For details on approximate method, refer to page 3-37.
To clear the markers
1. Press [F5] (MARKER DELETE).
TIP
Refer