JDS Uniphase CellAdvisor JD780A Series, Руководство пользователя

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JD780A Series Analyzers
Using CDMA Signal Analyzer
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b. Enter a value by using the numeric keys.
c. Press the Enter soft key.
3.
Optional . Go to SAVE/LOAD > Save , and then select the save option from the choices available
for your measurement mode. See
“Using save” on page 31 for more information.
Measurement example
Figure 172 Multipath profile measurement with CDMA OTA signal analyzer
Code domain power
Channels with high correlation factors are determined to be active channels and are indicated as such
on the display. Once the channels are decoded, the analyzer determines the power of each channel
relative to the total signal power.
This measurement helps to verify that each code channel is operating at its proper level and helps to
identify problems throughout the transmitter design from the coding to the RF section. System
imperfections, such as the non-linearity of amplifiers, will present themselves as an undesired
distribution of power in the code domain.
Setting measure setup
After configuring test parameters as described in
“Configuring test parameters” on page 334, 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:
a. Toggle the PN Offset soft key between Auto and Manual .