Remote Operations 13-3
Remote-to-local transition
When changing from remote to local 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 user-defined display messages are cancelled.
• The display is turned on (if it was previously turned off).
• Source autoranging is disabled.
• Concurrent measurements are enabled.
• If resistance was enabled, source readback is enabled.
• The display is set to the default toggle state.
• Readings are continuously taken (if OUTPUT is on).
Selecting an interface
The SourceMeter supports two built-in remote interfaces:
• GPIB (General Purpose Interface Bus)
• RS-232 interface
You can use only one interface at a time. The factory interface selection is the GPIB bus. You
can select the interface only from the front panel. The interface selection is stored in non-
volatile memory; it does not change when power has been off or after a remote interface reset.
The GPIB bus is the IEEE-488 interface. You must select a unique address for the Source-
Meter. The address is displayed when the instrument is turned on. At the factory, the address is
set to 24.
The RS-232 interface is a serial interface. Programmable aspects of this interface include the
following (factory default settings are shown in parentheses):
• Baud rate (9600)
• Data bits (8)
• Parity (none)
• Terminator (CR)
• Flow control (none)
An interface is selected and configured from the COMMUNICATIONS option of the Main
Menu. See Section 1, Main menu. For details on the programmable aspects of the interfaces,
see Primary address and RS-232 interface operation in this section.
NOTE When changing interface selections, the SourceMeter performs a power-on reset. To
check and/or change options of the selected interface, you must re-enter the menu
structure.
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