User Manual

2400 Series SourceMeter
®
User’s Manual SCPI Command Reference 18-93
STARt <n>
:SOURce[1]:LIST:CURRent:STARt <n> Set current list start point
:SOURce[1]:LIST:VOLTaget:STARt <n> Set voltage list start point
Parameters <n> = 1 to 100 Set start point of list sweep
MINimum 1
MAXimum 100
DEFault 1
Description These commands set the starting point in the current or voltage list
sweep. The <n> parameter is 1-based, and it must be less than or
equal to the number of points in the sweep. The new starting location
will
only be used when the direction of the sweep is up
(:SOUR:LIST:CURR:DIR UP, for example). Changing the direction to
down will make the sweep start at the last point in the list, but the
starting point will be restored when the direction is changed to up. If
the sweep reaches the end of the list, the sweep will continue from
the first point in the list. The starting points for voltage and current
sweeps are saved separately, and are part of a user-saved setup.
Configure memory sweep
A memory sweep lets you perform a sweep using setups stored in up to 100 memory
locations. This allows you to sweep using multiple source-measure operations and
math expressions. (See “CALCulate[1],” page 18-26, subsystem.)
NOTE In order to run a memory sweep, the memory function must be selected, and
the trigger count must be the same as the number of memory points in the
sweep. Use the :FUNCtion:MODE command to select the MEMory function.
(See
“Select function modes,” page 18-72.) Arm count (ARM:COUNt) and
trigger count (TRIGger:COUNt) are set from the Trigger Subsystem.
When memory is initialized (:SYSTem:MEMory:INITialize), all 100 memory
locations for a memory sweep are initialized to the present setup configura
-
tion of the SourceMeter with CALC1 disabled. User-defined math expres-
sions are replaced with the Power math expression.
Error 809 (Source memory location revised) occurs when a memory sweep
references an expression that no longer exists. The memory sweep is
revised to disable CALC1.
In order to execute a memory sweep, the product of the arm count and trig-
ger count should be at least the same as the number of points in the sweep.
Use the :FUNCtion:MODE command to select the MEMory function. (See “Select
function modes,” page 18-72.) Arm count (ARM:COUNt) and trigger count
(TRIGger:COUNt) are set from the Trigger Subsystem.