Keysight N9938-90003 User’s Guide 167
SA (Spectrum Analyzer) Mode (Option 233–Mixed Analyzers)
Channel Measurements
—Then enter a value to be used to reference the data using the numeric
keypad, arrows, or the rotary knob.
Other ACPR Settings
All relevant FieldFox settings are made automatically to ensure the highest
accuracy, such as ResBW, VideoBW, and sweep (SwpAcquisition) speed.
These, and all other SA Mode settings, can be changed manually in a ACPR
measurement.
— Learn about Measurement Preset in “Measurement Preset” on page 158.
— Learn about Averaging in “Averaging” on page 158.
RRC Weighting
RRC, or Root-Raised-Cosign weighting, is offered with Channel Power and
ACPR measurements.
When RRC Weighting is applied to transmitted and received power, the edges
of the channel are ‘smoothed’ to help prevent interference. To accurately
measure a channel that has RRC weighting, set the same value of RRC
weighting as that used in the transmitter and receiver.
Figure 7-14 Channel power measurement with.22 RRC applied
RRC Weighting is set and enabled automatically when included in a selected
radio standard.
To set and enable RRC Weighting:
—Press Meas Setup 4
—Then RRC Weighting ON OFF
—Then More
—Then RRC Alpha [current setting]
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