JDS Uniphase CellAdvisor JD780A Series, User Manual

Page: 306 / 592

JD780A Series Analyzers
306
Using LTE
– TDD Signal Analyzer
Signal performance test
Unlike the other auto measurement tests, the Signal Performance Test runs measurements
continuously.
Setting limit for signal performance test
You can set test limits for test item(s) in the auto measurement.
Procedure
1.
Press the LIMIT hot key.
2.
Press the RF Test Limits > Channel Power soft key, and then set the limits for the channel
power. Other RF test items are not used in the signal performance test.
3.
Press the Modulation Test Limits soft key, and then enable test limits as desired.
4.
Optional . You can enable alarm sound that goes off if the measurement falls outside of the limit.
Toggle the Beep soft key between On and Off to enable or disable the beep sound.
5.
Optional . Go to SAVE/LOAD > Save , and then select Limit to save the limit settings.
See
“Using save” on page 31 for more information.
Setting measure setup
After configuring test parameters as described in the
“Configuring test parameters” on page 265, 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.
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.
3.
Press the MIMO soft key, and then select the antenna number option: 2x2 or 4x4 .
This MIMO (Multiple Input Multiple Output) setting is activated only if the option 031 LTE-
Advanced TDD is installed with a license number. If not, the instrument sets this option to 2x2 by
default. A 2x1 or 4x1 RF combiner is also required to able to test on MIMO channels.
4.
Press the Antenna Port soft key, and then select the option: Auto , 0 , 1 , 2 , or 3 .
If the option 031 LTE-Advanced TDD is not installed or if the MIMO is set to 2x2, the antenna
ports 2 and 3 are disabled.
5.
Press the Bandwidth soft key, and then select the nominal channel bandwidth to be measured,
from the following choices:
–
1.4 MHz , 3 MHz , 5 MHz , 10 MHz , 15 MHz , and 20 MHz
6.
Toggle the RF Profile soft key between On and Off to turn on or off the RF profiling such as
channel power and subframe frequency error.
7.
Toggle the Modulation Profile soft key between On and Off to turn on or off the modulation
profiling such as P-SS, S-SS, Data - QPSK, Data
– 16 QAM, and Data – 64 QAM.
8.
Toggle the MIMO Profile soft key between On and Off to turn on or off the MIMO profiling such
as TX1 - RS0, TX2 - RS1, and time alignment error.
9.
Toggle the External Offset soft key and select On to set the external offset value.