Chapter 2 81
One-Button Measurement Functions
MEASURE (Spectrum Analysis Mode)
One-Button Measurement Functions
2.2.13 Spectrum Emission Mask
Spectrum Emission Mask measurement includes the in-band and out-of-band spurious
emissions. As it applies to W-CDMA (3GPP), this is the power contained in a specified
frequency bandwidth at certain offsets relative to the total carrier power. It may also be
expressed as a ratio of power spectral densities between the carrier and the specified offset
frequency band. For WLAN, the reference power is taken as the peak PSD in the signal,
and all offset results are also the peak PSD in that offset as opposed to the integrated
power.
Offsets that are turned off (inactive) will return -999.0 when their results are queried over
SCPI.
For more information see “Meas Setup (Spectrum Emissions Mask—SEM)” on page 183.
Key Path: MEASURE
History: Added with ESA firmware revision A.08.00