Chapter 15
Using Cable and Antenna Analyzer
JD700B Series User’s Guide
539
Figure 330 Cable loss (1 port) measurement with zoom
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
544 for more information.
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 543 for more information.
Performing Smith chart measurements
The Smith Chart measurement is used to measure DUTs’ impedance and phase to properly tune RF
devices. Smith chart also displays impedance-matching characteristics in cable and antenna systems or
filter and duplexer devices.
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 528.
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:
Toggle the
Bias Tee
soft key and select
On
.
Enter a value between 12 and 32 with 0.1 V step, and then press the
V
soft key.