72 N5186A MXG and X-Series SA Measurement Guide
5G New Radio (NR) Measurements
5G Waveform, EVM, and ACP Analysis
6. Select the Extensions tab and change the External Trigger location to
Trigger 1 In (if using an N9040B with Option H1G, select Trigger 3) and
Phase Noise Optimization to Best Wide Offset.
7. From the toolbar, select the Auto-Range dropdown and select EVM-Table
or Algorithm Based.
— EVM - Table or Algorithm Based performs EVM optimization based
on prescribed table/algorithm instead of using EVM in the feedback
loop. This method of EVM auto-range is normally faster than Meas
Based Iteration, but may not achieve the most optimal setup for
minimized EVM.
— EVM - Meas Based Iteration has a feedback loop around the entire
measurement, uses the measured EVM in the feedback loop, and
tries to adjust hardware parameters to minimize the EVM. It is the
slowest EVM auto-range method, but it should achieve the most
optimal setup for good EVM.
8. Select the Auto-Range icon to run the measurement for EVM optimization.
This may take a few minutes to complete.
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