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ACPE
Adjacent Channel Power Extended
Performs the adjacent channel power extended measurement.
Syntax
ACPE
Equivalent
Softkey:
AKl
CRAM
PWR
extd .
Related Commands: ACPPAR, ACPSNGLM, ACPSP, ACPBW.
Example
OUTPUT
718;"ACPE;"
&forms
the adjacent channel power extended
meamrewznt.
Description
ACPE performs the adjacent channel power measurement using the values for channel spacing
(ACPSP) and channel bandwidth (ACPBW). ACPE is similar to ACP, but unlike ACP, ACPE
measures the adjacent channel power over an extended dynamic range. The extended range is
measured by taking two measurement sweeps, with the reference level for each sweep set to
different values, and then combining the trace data.
Executing ACPE places
the
spectrum analyzer in the single sweep measurement mode. The
log scale is set to 13
dB/div,
which provides an actual display range of 104
dB.
If you execute
the continuous sweep measurement command (ACPCONTM), only the trace results for the top
80
dB
are obtained; the numeric and ACP graph results of the ACPE measurement are not
available.
To use ACPE:
1. Set the center frequency to the carrier’s frequency.
2. For best accuracy, set the reference level so that the carrier signal peak is within the first
(top) division of the display graticule.
3. Select the channel spacing with the ACPSP command.
4. Select the channel bandwidth with the ACPBW command.
5. If you want the spectrum analyzer settings to be set automatically, ensure that ACPPAR is
set to 1. If you want to set the spectrum analyzer settings manually, set ACPPAR to 0. See
“ACPPAR” for more information about selecting the spectrum analyzer settings manually.
6. If the spectrum analyzer is in the continuous-sweep mode, use the single sweep command
(SNGLS) to select the single-sweep mode.
7. Execute the ACPE command.
8. Query ACPERR to determine if there is a setup error for the ACP measurement. See the
following table for more information about ACPERR.
9. If no error occurred, query ACPPWRTX, ACPMAX, ACPLOWER, and ACPUPPER variables
for the numeric results of the ACPE measurement. See the following table for more
information about these variables.
5.38
Programming Commands