Technical data

244 Agilent N8201A Performance Downconverter Synthetic Instrument Module, 250 kHz to 26.5 GHz
14 Measure (Spectrum Analysis Mode)
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 287.
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
improved speed of making ACP measurements. Fast is only enabled for the 3GPP
W-CDMA radio standard only.
The measurement settings may be configured by pressing Meas Setup after ACP has been
selected. Pressing Radio Standard after Mode Setup has been selected will access all the
Radio Standards available for which this measurement can be applied. Pressing Meas
Control allows you to pause or restart your measurement, or toggle between continuous
and single measurement mode.
Key Path: MEASURE
Remote Command:
Measurement Results Available
Command n Condition Results Returned
:CONFigure:ACP
:INITiate:ACP
Not Applicable
:FETCh:ACP[n]?
:MEASure:ACP[n]?
:READ:ACP[n]?
not
specified, or
n=1
Any Meas Type
Radio Std = None
Only one offset A is
on
Returns 3 comma-separated values that correspond
to:
main channel power,
lower-adjacent channel power (dBc), and
upper-adjacent channel power (dBc).