Models 2500 and 2502 User’s Manual SCPI Command Reference 17-69
For example, assume you are testing a device that operates at 10V, and
you want to sweep from 8 to 12 volts. To do this, you would specify the
center to be 10V and the span to be 4 volts (12 - 8).
Use the :STEP or :POINts command to specify the number of source
and measure points in the sweep.
:CENTer and :SPAN are coupled to :STARt and :STOP. Thus, when
center and span values are changed, the values for start and stop are
affected as follows:
Start = Center - (Span / 2)
Stop = Center + (Span / 2)
STEP <n>
:SOURce[1]:VOLTage:STEP <n> Specify step size (source 1 sweep)
:SOURce2:VOLTage:STEP <n> Specify step size (source 2 sweep)
Parameters <n> = -200 to 200 Set source level (volts)
DEFault 0V
MINimum -200V
MAXimum +200V
Query :STEP Query step size for sweep
:STEP? DEFault Query *RST default level
:STEP? MINimum Query lowest allowable level
:STEP? MAXimum Query highest allowable level
Description These commands are used to specify a step size for a linear sweep.
When the sweep is started, the source level changes in equal steps from
the start level to the stop level. A measurement is performed at each
source step (including the start and stop levels).
NOTE This command cannot be used for a logarithmic sweep. Use the :POINts com-
mand to set the source and measure points for a log sweep.
To avoid a setting conflicts error, make sure the step size is greater than
the start value and less than the stop value.
The number of source and measure points in a linear sweep can be cal-
culated as follows:
Points = [(Stop - Start) / Step] + 1
Points = (Span / Step) + 1
An alternate way to set the source and measure points in a linear sweep
is to simply specify the number of source and measure points in the
sweep using the :POINts command.
Note that the :STEP and :POINts commands are coupled. Changing the
step size also changes the number of source and measure points. Con-
versely, changing the number of source and measure points changes the
step size.
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