6482-901-01 Rev. A / August 2012
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16-45
Model 6482 Dual-Channel Picoammeter / Voltage Source Reference Manual
Section 16: SCPI Command Reference
SPACing <name>
:SOURce[1]:SWEep:SPACing <name>Select scale for source 1 sweep
:SOURce2:SWEep:SPACing <name>Select scale for source 2 sweep
Parameters
<name> = LINear
Linear scale
LOGarithmic
Logarithmic scale
Query
:SPACing?
Query scale for sweep
Description
These commands are used to select the scale for the sweep. With LINear
selected, the source and measure points in the sweep will be performed on a
linear scale. With LOGarithmic selected, the source and measure points will be
performed on a logarithmic scale.
STARt <n>
STOP <n>
:SOURce[1]:VOLTage:STARt <n>Specify source 1 start voltage level
:SOURce[1]:VOLTage:STOP <n>Specify source 1 stop voltage level
:SOURce2:VOLTage:STARt <n> Specify source 2 start voltage level
:SOURce2:VOLTage:STOP <n> Specify source 2 stop voltage level
Parameters
<n> =
-30 to 30
Set source level (volts)
DEFault
0 V
MINimum
-30 V
MAXimum
+30 V
Query
:STARt?
Query start level for sweep
:STARt? DEFault
Query *RST default level
:STARt? MINimum
Query lowest allowable level
:STARt? MAXimum
Query highest allowable level
:STOP?
Query start level for sweep
:STOP? DEFault
Query *RST default level
:STOP? MINimum
Query lowest allowable level
:STOP? MAXimum
Query highest allowable level
Description
These commands are used to specify the start and stop levels for a sweep. If
using a fixed (manual) source range, the sweep will be performed using a source
range that will accommodate all source values (best fixed range). You can use
source autorange if sweeping through one or more source ranges.
When the sweep is started, the source will output the specified start level and,
after the delay period of the SDM cycle, a measurement is performed.
The sweep continues until the source outputs the specified stop level. At this
level, the instrument again performs another measurement (after the SDM delay)
and then stops the sweep.
The source and measure points in a sweep can be set by specifying a step size,
or by specifying the number of source and measure points in the sweep. Refer to
“STEP <n>,” page Section 16-46,
“POINts <n>,” page Section 16-47.
:STARt and :STOP are coupled to :CENTer and :SPAN. Thus, when start and stop
values are changed, the values for center and span are affected as follows:
Center = (Start + Stop) / 2
Span = Stop - Start
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