Anritsu Network Master MT9090A Series, Руководство по эксплуатации, Страница: 125 / 200

MT9090A/MU909011A Network Master User’s Guide 4-27
between the two points. Normally the Cursor A (Y-axis) data
is greater than the Cursor B (Y-axis) data and a positive loss
measurement is displayed. Otherwise, the loss value is
reported as a negative quantity called a “gainer”.
Trace Graph
The Trace graph displays the trace data in graph form. Power
loss is measured in dB along the Y-axis and distance is
measured along the X-axis. The Distance Unit selected on the
Setup screen Preferences settings establishes the X-axis units.
The downward slope of the trace indicates power loss
(attenuation) over the distance of the fiber.
Figure 4-21: Trace Graph
1 Y-axis (vertical axis)
2 X-axis (horizontal axis)
3 Trace waveform
4 dB level indicator
5 Cursor A
6 Cursor B
1
3
5 6
2
4