Chapter 15
Using Cable and Antenna Analyzer
540
JD700B Series User’s Guide
NOTE
The instrument’s built-in bias tee function (option 002) supplies 12-32 VDC bias to active
devices through the
RF In
port, eliminating the need of an external power supply.
NOTE
See “Performing reflection measurements” on page 531 for more information on how to
set other measurement setup parameters for the Smith Chart measurement.
Measurement example
Figure 331 Smith chart measurement
Performing 2-port vector measurements
The Vector measurement is used to perform faster and more accurate measurement with around 80 dB
dynamic range. It also provides antenna isolation measurement. You can determine DUT’s S
21
phase
characteristic by selecting the measurement display type as Phase.
Making a measurement
Procedure
1
Make a proper cable connection as described in “Connecting a cable for 2-port vector
measurements” on page 529.
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
Toggle the
Display
soft key and select
Magnitude
to view measurements in dB or
Phase
in
degree.
