JDS Uniphase CellAdvisor JD780A Series, User Manual

Page: 473 / 592

JD780A Series Analyzers
Using Mobile WiMAX Signal Analyzer
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NOTE
The permutation zone that is a number of contiguous OFDMA symbols in downlink that
use the same permutation. The DL subframe may contain more than one permutation
zone. The maximum number of DL zone is 8 in one DL subframe.
–
To set the delay, complete the following steps:
a. Press the Delay soft key to set the amount of delay in µs.
b. Enter a value by using the numeric keys. You can also use the rotary knob.
c. Press the µs soft key.
NOTE
The Delay setting is used only when there is a time offset in the signals to be measured.
Measurement example
Figure 236 Constellation measurement with Mobile WiMAX 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 479 for
more information. The Spectral Flatness is not used in the Constellation mode.
Spectral flatness
The Spectral Flatness is used to measure the flatness energy of the constellation according to the
WiMAX specification IEEE 802.16e.
Setting measure setup
After configuring test parameters as described in the
“Configuring test parameters” on page 456, 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.