Chapter 16
Performing RFoCPRI Testing
JD700B Series User’s Guide
599
Measurement example
Figure 365 Occupied bandwidth measurement with RFoCPRI LTE-FDD 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 RFoCPRI signal analysis” on page
616 for more information.
Conducting power vs. time (frame) measurement
The Power vs. Time (Frame) measures the modulation envelope in the time domain, showing the power of
each time slot in an LTE signal.
Making a measurement
Procedure
1
Press the
MEASURE
hot key to select the measurement mode.
2
Select
Signal Analyzer > LTE-FDD > P vs T (Frame)
.
3
Configure test parameters as described in the “Configuring test parameters” on page 592.
4
Press the
MEASURE SETUP
hot key, and then set the following parameters:
Measurement setups as described in the “Setting measure setup” on page 594
Rx Parameters as described in the “Configuring Rx Parameters” on page 594
5
To select the subframe number to be measured, complete the following steps:
Press the
Subframe No
soft key.
Enter a value by using the numeric keys or the rotary knob.
Press the
Enter
soft key.
6
Toggle the
Physical Cell ID
soft key to
Auto
or
Manual
as desired:
Auto:
Makes the instrument detect the Physical Cell ID for the LTE signal automatically.
Manual:
Sets a specific Physical Cell ID for the LTE signal manually in order to speed up
the synchronization.
7
Depending on your selected NEM, you may need to turn on or off the inversion of the I and Q
order by toggling the
IQ Swap
soft key to
On
or
Off
.
8
Optional
. Press the
Miscellaneous
soft key, and then do the following as needed:
To assign a antenna port number automatically or manually, press the
Antenna Port
soft
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