User manual

14-2 Remote Operations 2400 Series SourceMeter
®
User’s Manual
Differences: remote vs. local operation
Operation enhancements (remote operation)
There are some source-measure operations you can do over the IEEE-488 bus
and RS-232 interface that you cannot do from the front panel; these are summa-
rized below.
Math expressions
There are five math expressions available from the panel. All except the Percent
Deviation are available as pre-defined math expressions for remote operation.
However, remote operation allows you to create up to five user-defined math
expressions for a total of nine expressions. An example program shows how to
create Percent Deviation as a user-defined math expression.
Concurrent measurements
With the use of the TOGGLE key, you can measure (display) two functions con-
currently. Using remote operation, you can perform concurrent measurements on
all three functions (voltage, current, and resistance). See Section 18, “SENSe1
subsystem,” for details.
NOTE For the Model 2430, concurrent measurements cannot be performed
while in the Pulse Mode. See
Section 5 for details on Pulse Mode opera-
tion.
Local-to-remote transition
When changing from local to remote operation, the following actions occur:
• The SourceMeter stops performing source-measure operations and returns
to the idle state (ARM annunciator off).
• All sweep operations are aborted.
• All menus are exited.
• All pending front panel commands are aborted.
• Source and compliance editing are disabled.
• Data in the sample buffer is lost (i.e., :FETCh?, :CALC1:DATA?, and
:CALC2:DATA? will not return any data until readings are taken while in
remote).
• Concurrent measurements are enabled.
• All other settings are not affected, including those for the :TRACe buffer
(data store).