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Measurement example
Figure 121 Channel power measurement with LTE - TDD 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 RF tests" on page 279 for more
information.
Occupied bandwidth
The Occupied Bandwidth measures the spectrum shape of the carrier. It is defined as the bandwidth,
which includes 99% of the transmitted power among total transmitted power.
Setting measure setup
After configuring test parameters as described in the "Configuring test parameters" on page 265, you
can continue your measurement.
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: 1.4 MHz, 3 MHz, 5 MHz, 10 MHz, 15 MHz, or 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.
c.
Press the Enter soft key.
4.
Toggle the Cell ID soft key and select Auto or Manual as desired:
–
Auto: to let the instrument detect the Cell ID for the LTE signal automatically.
–
Manual: to set a specific Cell ID for the LTE signal manually in order to speed up the
synchronization with a BTS.
Using LTE – TDD Signal Analyzer
JD780A Series Analyzers
273
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