388 Chapter7
Language Reference
ACPGRAPH Adjacent Channel Power Graph
ACPGRAPH Adjacent Channel Power Graph
Syntax
Figure 7-19 ACPGRAPH Syntax
Description
The ACPGRAPH command turns on or off a graphical representation of
the adjacent channel power ratio, for the selected channel bandwidth,
as a function of the channel spacing. The command requires data that is
only available with the peak or analog method.
The upper graticule represents an ACP ratio of 0 dB. The vertical scale
for the ACP graph is the same as the vertical scale for the spectrum
trace, usually 10 dB/division. The horizontal scale represents the
channel spacing, with 0 Hz spacing in the center and a scale factor that
is the same as that for the spectrum trace, or the frequency span
divided by 10 divisions.
The graph can demonstrate how rapidly the ACP ratio changes with
channel spacing. The ACP graph is not defined for channel spacings
where the graph is drawn at the bottom graticule line. For these points,
the channel bandwidth would include frequencies beyond the edges of
the screen, where no data was taken.
The ACP graph is drawn in trace B. Query trace B (see TRB command)
to obtain the ACP graph via GPIB.
Preset State
Off
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