JDS Uniphase CellAdvisor JD780A Series, Руководство пользователя

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JD780A Series Analyzers
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Using Cable and Antenna Analyzer
3.
Press the Data Points soft key to change the resolution of your measurement, and then select
the data point option: 126 , 251 , 501 , 1001 , and 2001 . Changing the data point does not affect
current calibration.
NOTE
The larger number you choose, the higher resolution you get and the longer the
instrument takes to sweep and display results. Selecting the data point larger than what
you need for a measurement will result in unnecessarily long sweep time. It is
recommended that you select high resolution data points only for an instance of
measuring wide frequency bands or requiring precise measurement data.
4.
Optional . To select the output power, toggle the Output Power soft key between 0 dBm and -30
dBm .
NOTE
When an amplifier’s reflection is measured, it is recommended that you change this
output power level to -30 dBm and then re-calibrate. Changing to -30 dBm may result in
reduced measurement dynamic range.
Measurement example
Figure 265 2-port scalar measurement
Analyzing measurements
Setting trace and display
You can display up to six traces on the measurement chart simultaneously.
Procedure
1.
Press the TRACE/DISPLAY hard key.
2.
Press the Select Trace soft key, and then select the trace number: T1 , T2 , T3 , T4 , T5 , or T6 .
The legend shape of the selected trace changes from square to round to indicate that the trace is
the active one now.
3.
Toggle the Trace View soft key and select On to display the selected trace.