Chapter 10
Using CDMA Signal Analyzer
JD700B Series User’s Guide
365
Measurement example
Figure 216 Constellation measurement with CDMA signal analyzer
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 371 for
more information.
Code domain power
The Code Domain Power (CDP) measures the distribution of power across the set of code channels,
normalized to the total power. It helps to verify that each code channel is operating at its proper level and to
identify problems throughout the transmitter design from coding to the RF section. System imperfections
such as amplifier non-linearity will present themselves as an undesired distribution of power in the code
domain.
Setting measure setup
After configuring test parameters as described in the “Configuring test parameters” on page 352, 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
To set the Pseudo-Noise (PN) offset, complete the following steps:
Toggle the
PN Offset
soft key between
Auto
and
Manual
.
Enter a value by using the numeric keys to set manually.
Press the
Enter
soft key.
3
To set the incremental step for the PN offset, complete the following steps:
Press the
PN Increment
soft key.
Enter a value by using the numeric keys.
Press the
Enter
soft key.
4
To set the threshold between Auto and Manual, complete the following steps:
Press the
Threshold
soft key. Its default setting is -27 dB.
Содержание CellAdvisor JD700B Series
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