Codogram - JDS Uniphase CellAdvisor JD780A Series User Manual

JD780A Series Analyzers
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 modulation tests" on page 180 for
more information.
Setting display
You can view .your measurement results in a different view option.
Procedure
1.
Press the TRACE/DISPLAY hard key.
2.
Toggle the View soft key and select the display option:
–
Zoom: to view the result in detail with zoom-in window.
The Position and Width menus become activated.
–
Full: to view the full measurement result.
3.
To define the zoom start position and width, complete the following steps:
a. Press the Position soft key.
b. Enter a value of the position by using the numeric keys.
c. Press the Enter soft key.
d. Press the Width soft key, and then select the Walsh code option: 32, 64, 128, or 256.
4.
Toggle the Constellation soft key between On and Off to enable or disable the constellation
chart on the Code Domain Power screen.
5.
Toggle the Control Channel soft key and select the control channel mode option:
–
Normal: to view the relative ratio of each control channel vs. total power.
–
Delta: to view the relative ratio of each control channel vs. CPICH channel.

Codogram

The Codogram displays how the code level is changing over time and makes it easier for you to view
traffic channels as they initiate and terminate and to track traffic channels call levels over time. The
Codogram measurements can be saved into an external USB memory so that a post-analysis can be
done with the application software JDViewer.
Setting measure setup
After configuring test parameters as described in the "Configuring test parameters" on page 155, you
can continue your measurement. The measurement settings can be saved and recalled as a file. You
can also use JDViewer, PC application software to configure a measure setup, save as a file, and load
the file on to the instrument.
Procedure
1.
Press the MEASURE SETUP hot key.
2.
Optional. To set the scramble code, complete the following steps:
a. Toggle the Scramble soft key between Auto and Manual.
b. Enter a value by using the numeric keys to set manually.
c. Press the Enter soft key.
174
Using WCDMA/HSPA+ Signal Analyzer