Chapter 13
Using Mobile WiMAX Signal
Analyzer
JD700B Series User’s Guide
485
NOTE
The Delay setting is used only when there is a time offset in the signals to be measured.
Measurement example
Figure 289 Spectral flatness 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 for the Spectral Flatness. See “Setting limit for modulation
tests” on page 488 for more information.
EVM vs. subcarrier
The EVM vs Subcarrier
shows the error vector magnitude representing the average constellation error of
WIMAX OFDMA subcarriers.
Setting measure setup
After configuring test parameters as described in the “Configuring test parameters” on page 468, 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
Press the
System Config
soft key, and then do the following:
Press the
Bandwidth
soft key, and then select the nominal channel bandwidth to be
measured from the following choices:
7 MHz (8/7):
Sets the channel bandwidth to 7 MHz with sampling factor 8/7. In
conjunction with nominal channel bandwidth
8.75 MHz (8/7):
Sets the channel bandwidth to 8.75 MHz with sampling factor 8/7
10 MHz (28/25):
Sets the channel bandwidth to 10 MHz with sampling factor 28/25
Toggle the
Frame Length
soft key and select
5 ms
or
10 ms
.
Press the
TTG (RTG)
soft key to set the transmit/receive transition gap between the last