Agilent Technologies 86120C, Руководство пользователя

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4-29
Programming Commands
CALCulate1 Subsystem
TRANsform:FREQuency:POINts
Sets the size of the fast Fourier transform (FFT) p erformed by the
instrument.
Syntax
:CALCulate1:TRANsform:FREQuency:POINts{?| {<integer> | MINimum | MAXimum}}
< integer > Sets FFT size. Must be either 15,047 or 7,525. Other values
result in an error.
Constant Description
MINimum 7,525
MAXimum 15,047
Attribute
Summary Non- sequential command
Preset
State: array size set to 15,047
*RST State: 15,047
SCPI Comp liance: instrument sp ecific
Description A NORMAL up dated disp lay corresp onds to an FFT size of 15,047. A
FAST up dated disp lay corresp onds to an FFT size of 7,525. These val-
ues are a subset of the uncorrected- data buffer shown in the figure
that is located in
“Making Measurements” on page 3- 5 . Changing the
number of p oints causes the instrument to rep rocess the current set of
data.
The query form of the command returns the number of points in the
data set. This is the number of measurement points that will be
returned by the CALC1:DATA? query.
Non-sequential command
Always use an *OPC? query or a *WAI command to ensure that this command has
the time to complete before sending any more commands to the instrument.
Refer
to “Always force the Agilent 86120C to wait for non-sequential commands” on
page 3-12
for more information.