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Figure 122 Constellation measurement with LTE - TDD signal analyzer (MBMS On)
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 268 for
more information.
Data channel
The Data Channel measures the constellation for the specified resource block as well as the
modulation accuracy of each PDSCH at the specified subframe.
Setting measure setup
After configuring test parameters as described in the "Configuring test parameters" on page 234, 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 nominal channel bandwidth to be measured, complete the following steps:
a
Press the Bandwidth soft key.
b
Select the bandwidth option from the choices: 1.4 MHz, 3 MHz, 5 MHz, 10 MHz, 15 MHz,
and 20 MHz.
3
To select the subframe number to be measured, complete the following steps:
a
Press the Subframe No soft key.
b
Enter a value by using the numeric keys. You can also use the rotary knob.
NOTE
For MBMS testing, this subframe number must be neither 0 nor 5 as these subframes 0
and 5 are not available for MBMS and it must be set to the MBMS transmitted channel's
subframe number.
c
Press the Enter soft key.
4
Optional. Toggle the Cell ID soft key and select Auto or Manual as desired:
JD700B Series User's Guide
Chapter 9 Using LTE - TDD Signal Analyzer
255
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