Keysight M9383B Measurement Manual page 131

5G NR Measurements Using the VSA Software
5G Waveform and EVM Analysis Using VSA Software
12.Select the Time tab and set:
13.Select the Advanced Settings tab and select DC Punctured.
M9383B/84B Measurement Guide
We will use the default values for RS Sequence, Power Boosting, and
Antenna Port. Power Amplifier customers would not change the DMRS
sequences, but they might be interested in modifying Power Boosting.
— Result Length to 10 Subframes.
— Meas Interval to 2 Subframes.
— Select Frame Trigger is Present.
5G NR counts the DC subcarrier as a valid subcarrier for rate-matching
purposes. The network decides if the DC subcarrier is modulated or not.
High LO feedthrough will impact demodulation and EVM performance of
the input signal. This setting is off by default.
Use Extend Frequency Lock Range if you cannot lock to the input signal.
Compensate Symbol Clock Offset is used along with timing track to
compensate for clock error in the input signal. The Symbol Clock Error
result is reported in the Summary trace.
Symbol Phase Compensation > From Measurement Center is enabled by
default. It is specified in the 3GPP requirement and is used to compensate
for phase differences between symbols caused by up conversion or down
conversion. Getting this setting wrong will cause demod issues.
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