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6482-901-01 Rev. A / August 2012
Section 12: Remote Operations
Model 6482 Dual-Channel Picoammeter / Voltage Source Reference Manual
Remote versus local operation
This topic summarizes remote operation enhancements and local-to-remote and remote-to-local
transitions.
Local-to-remote transition
When changing from local-to-remote operation, the following takes place:
•
The Model 6482 stops taking readings and is placed into the idle layer of the trigger model.
•
All menus are exited.
•
All pending front-panel commands are aborted.
•
The reading buffer is cleared; FETCh?, CALC1:DATA?, and CALC2:DATA? will not return
any data until the Model 6482 takes readings while in remote operation.
•
All other settings remain unaffected, including TRACe buffer storage.
•
Sources are placed in the FIXed mode.
Remote-to-local transition
When changing from remote-to-local operation, the following takes place:
•
The Model 6482 stops taking readings and is placed into the idle layer of the trigger model.
•
All user-defined displays are disabled.
•
The display is re-enabled if it was previously turned off.
•
Readings are continuously taken.
•
Sources are placed in the FIXed mode.
Selecting an interface
The Model 6482 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 nonvolatile
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 Model 6482.
The address is displayed when the instrument is turned on. At the factory, the address is set to 25.
The IEEE-488 address can only be changed from the front panel while the IEEE-488 bus is
enabled.
The RS-232 interface is a serial interface. Programmable attributes of the RS-232 interface
include the following (factory default settings are shown in parentheses):
•
Baud rate (9600)
•
Data bits (8)
•
Parity (none)
•
Terminator (CR)
•
Flow control (none)
RS-232 settings for baud rate, parity, and data bits are accessible only from the front panel while
RS-232 is enabled.
Summary of Contents for 6482
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