Keysight Technologies N9321C, User Manual

Page: 136 / 220

Key Reference
Meas
128
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.
Avg Number
On Off
Set
Avg Number
to
On
to specify the number of measurement
averages used when calculating the measurement result. The
average will be displayed at the end of each sweep. Setting
Avg Number
to
Off
disables measurement averaging.
Key access:
Meas > SEM
Meas Type
Displays a menu to select a measurement reference type,
Total Pwr
Ref
or
PSD Ref
.
Key access:
Meas > SEM
Ref Channel
Accesses the softkeys to change the reference channel settings.
Key access:
Meas > SEM
Total Pwr Ref When
Total Pwr Ref
is selected, the power in the
carrier is used as the reference in computing the
relative power values for the offsets.
PSD Ref When
PSD Ref
is selected, the mean power spectral
density of the carrier is used in computing the relative
power spectral density values for the offsets.
Chan Integ BW Specifies the integration bandwidth used in
calculating the power in the main channel.
Chan Span Specifies the span used in measuring the power in the
main channel.
Sweep Time
Auto Man
Specifies the sweep time used in measuring the
power in the main channel.