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JD780A Series Analyzers
Using LTE - FDD Signal Analyzer
213
Measurement example
Figure 89
Power vs. time (frame) measurement with LTE
– FDD 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 197, you
can continue your measurement. The measurement settings can be saved and recalled as a file.
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.
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:
Summary of Contents for CellAdvisor JD780A Series
Page 52: ...JD780A Series Analyzers 52 Getting Started Figure 6 Example of Web remote on Chrome...
Page 254: ...JD780A Series Analyzers 254 Using LTE FDD Signal Analyzer 3 RS SINR 4 S SS RSSI 5 P SS Power...
Page 323: ...JD780A Series Analyzers Using LTE TDD Signal Analyzer 323 3 RS SINR 4 S SS RSSI 5 P SS Power...
Page 390: ...JD780A Series Analyzers 390 Using EV DO Signal Analyzer 3 Pilot 4 MAC 64 5 MAC 128...
Page 525: ......
Page 590: ...JD780A Series Analyzers 590 Appendix Figure 306 Append keywords window...