Chapter 9
Using LTE-TDD Signal Analyzer
JD700B Series User’s Guide
301
Extended
. See “Appendix E – Cyclic prefix table” on page 784 for OFDM parameter details
by different bandwidth.
To set the delay, complete the following steps:
Press the
Delay
soft key to set the amount of delay in µs.
Enter a value by using the numeric keys. You can also use the rotary knob.
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 172 Power vs. time (frame) measurement with LTE – TDD signal analyzer
Conducting modulation measurements
Constellation
The Constellation is used to observe some aspects of modulation accuracy and can reveal certain fault
mechanisms such as I/Q amplitude imbalance or quadrature imbalance. It displays constellation diagram by
modulation types.
Setting measure setup
After configuring test parameters as described in the “Configuring test parameters” on page 283, 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:
Press the
Bandwidth
soft key.