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JD780A Series Analyzers
502
Using Cable and Antenna Analyzer
Connecting a cable for 2-port scalar measurements
Procedure
1.
Connect the one end of the Thru test cable to the Cable and Antenna Analyzer Reflection/RF Out
port of the instrument and the other end of the cable to DUT.
2.
Connect the DUT to the
Spectrum Analyzer RF In
port of the instrument as illustrated in Figure
254. Measurement result is displayed on the screen.
Figure 254
Connection for 2-port scalar measurement
CAUTION
The maximum input power for the
Spectrum Analyzer RF In
port is +20 dBm.
Performing reflection measurements
The Reflection measurement can be used to characterize cable and antenna system to ensure
transmission line impedance performance and signal reflection characteristics of cell-site across a
specific frequency range in voltage standing-wave ration (VSWR) or return loss.
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
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:
Summary of Contents for CellAdvisor JD780A Series
Page 52: ...JD780A Series Analyzers 52 Getting Started Figure 6 Example of Web remote on Chrome...
Page 254: ...JD780A Series Analyzers 254 Using LTE FDD Signal Analyzer 3 RS SINR 4 S SS RSSI 5 P SS Power...
Page 323: ...JD780A Series Analyzers Using LTE TDD Signal Analyzer 323 3 RS SINR 4 S SS RSSI 5 P SS Power...
Page 390: ...JD780A Series Analyzers 390 Using EV DO Signal Analyzer 3 Pilot 4 MAC 64 5 MAC 128...
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Page 590: ...JD780A Series Analyzers 590 Appendix Figure 306 Append keywords window...