MTP-200 Series User’s Manual
Shineway Technologies, Inc. - 62 -
5-point method to measure event loss:
Event loss is measured by 5-point method. When the [Loss] button in “Markers” Label is
not pressed, the marking points used by 5-point method will not display; however, the
system use 5-point method by default.
When apply 5-point method manually, the marker and its related 4 marking points divide the
trace around the event into 2 areas: the left to the active marker and the right to the marker,
the 2 marking points on the left and the 2 on the right both form a straight line, move the
two lines close to the event center and the power difference between the two lines is the
event insertion loss.
It also applies to the measurement of point A’s or B’s insertion loss.
Fig.12.3 5-point method
When [Loss] button is pressed, MTP-200 will show the marking points to measure the event
loss. When Marker A is selected, the screen will display the 4 marking points related to
Marker A. When Marker B is selected, the screen will display the 4 marking points related
to Marker B. The Markers and marking points can move separately.
The procedure to apply 5-point method:
1. In the main interface of MTP-200 OTDR module, click “Markers” label;
2. Press [Loss] button, Marker A, Marker B and their related marking points will be
displayed on the trace;
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