JDS Uniphase CellAdvisor JD780A Series, User Manual

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JD780A Series Analyzers
Using Cable and Antenna Analyzer
509
NOTE
You can use the LIMIT hot key to analyze your measurements with the user-definable
limit and Pass/Fail indication. See
“Setting limit for cable and antenna analyzer” on page
516 for more information.
Figure 260 Cable loss (1 port) measurement with the zone enabled
NOTE
You can go to MEASURE SETUP > Zoom to view your measurements in detail with the
user-definable zoom zones. See
“Setting zoom zones” on page 515 for more information.
Performing 1-port phase measurements
The 1-port Phase measurement is used to measure S
11
phase to tune antennas and to phase-match
cables.
Making a measurement
Procedure
1.
Make a proper cable connection as described in “Connecting a cable for reflection, DTF, 1-port
phase, and Smith Chart measurements
” on page 500.
2.
Press the MEASURE SETUP hot key.
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 turn the bias tee on, complete the following steps:
a. Toggle the Bias Tee soft key and select On .
b. Enter a value between 12 and 32 with 0.1 V step.