62 Chapter 2
One-Button Measurement Functions
MEASURE (Spectrum Analysis Mode)
One-Button Measurement Functions
Example: FETC:OBW? or MEAS:OBW? or READ:OBW? command returns scalar results
of occupied bandwidth and transmit frequency error.
FETC:OBW:FERR? or MEAS:OBW:FERR? or READ:OBW:FERR? commands will
return the single scalar result specified.
Figure 2-3 Occupied Bandwidth Measurement Results
2.2.6 Adjacent Channel Power—ACP
Adjacent Channel Power (ACP) is a measure of the power that leaks into adjacent
transmit channels. Depending on the radio standard selected from the Mode Setup menu,
this measurement can run in several different modes in order to measure different types of
signals. For more information see “Meas Setup (Adjacent Channel Power—ACP)” on
page 89.
ACP measures the power present in adjacent transmit channels. The span is set according
to the six available offsets and their associated integration bandwidths defined by you or
the selected radio standard (Mode Setup, Radio Std). The root-raised cosine filter also affects
the span and is only available for NADC, 3GPP W-CDMA, and TETRA radio standards.
•When Method is set to IBW, one sweep of the trace will be taken, and the band power for
each offset will be computed. Results will be displayed relative to the total power or the
power spectral density, depending on your selection after pressing Meas Setup, Meas Type.
You may view the results as the current trace, bar graph, or a combination.
•When Method is set to RBW, the main channel and offsets will be measured in zero span
and the combined results reported according to the Meas Type selection.
•When Method is set to Fast, the five point ACLR measurement method is used for
f2
f1