220                                                                                                                     Keysight N9927-90001 User’s Guide
SA (Spectrum Analyzer) Mode
Spectrum Emission Mask (SEM) — (SA Mode Only)
Figure 9-18  SEM Example FAIL Data - Absolute Limit (Blue), Relative Limit (Violet), Trace 
(Yellow), and Tabular Data
How to select Spectrum Emission Mask (SEM) Measurement
—Press Measure 1
—Then Channel Measurements
—Then Spectrum Emission Mask 
When SEM is selected, the following settings are maintained from a previous 
measurement: Center Frequency, Preamp ON|OFF, and RF Attenuation. 
Setting up the FieldFox for Spectrum Emission Mask (SEM) Measurement
1. Press Measure 1 > Channel Measurements > Spectrum Emission Mask
2. Press Meas Setup 4 then optionally select:
— Averaging
 Enable/disables averaging and sets the number of trace 
averages (Default is OFF).
— Meas Type
 Then select one of the following: