9-2
Remote Operation
Model 6487 Reference Manual
Selecting and configuring an interface
Interfaces
The Model 6487 supports two built-in remote interfaces:
•
GPIB interface
•
RS-232 interface
You can use only one interface at a time. At the factory, the GPIB bus is selected. 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.
GPIB interface
— The GPIB is the IEEE-488 interface. The Model 6487 must be
assigned to a unique address. At the factory the address is set to 22, but can be set to any
value from 0 to 30. However, the address must not conflict with the address assigned to
other instruments in the system. You can use either the SCPI or DDC language to program
the instrument.
RS-232 interface
— When using the RS-232 interface, you must set baud rate, data bits,
parity, terminator, and flow control. For the RS-232 interface, you can only use the SCPI
language to program the instrument.
Languages
For the GPIB interface, there are three programming languages to choose from:
•
SCPI language (488.2)
•
DDC language
•
488.1 language
klqb
For the RS-232 interface, only the SCPI language can be used to program the
instrument. When the RS-232 interface is selected, it automatically defaults to
SCPI.
SCPI language
— Standard Commands for Programmable Instrument (SCPI) is fully
supported by the GPIB and RS-232 interfaces. Always calibrate the Model 6487 using the
SCPI language.
DDC language
— The Model 6487 implements most DDCs (device-dependent com-
mands) available in the Keithley Model 487 picoammeter. The available commands are
provided in
. See the Model 487 Instruction Manual for details on operation.
The PDF of this manual is on the CD-ROM that was included with your shipment.
488.1 language
— See
for details.
