Keysight A Series User Manual page 252

SA (Spectrum Analyzer) Mode (Option 233–Mixed Analyzers)
Spectrum Emission Mask (SEM) — (Requires CPU2, SA Mode Only)
— Spectrum Emission Mask Pass/Fail – A PASS indicates the displayed SEM
Figure 9-23 SEM Example
252
is within the current boundaries specified. A FAIL indicates the current
signal fails with the specified parameters.
Keysight N9927-90020 User's Guide