12-6
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6482-901-01 Rev. A / August 2012
Section 12: Remote Operations
Model 6482 Dual-Channel Picoammeter / Voltage Source Reference Manual
IFC (interface clear)
The IFC command is sent by the controller to place the Model 6482 in the local, talker, and listener
idle states. The instrument responds to the IFC command by canceling front-panel TALK or LSTN
indicators, if the instrument was previously placed in one of these states.
Note that this command does not affect the status of the instrument. Settings, data, and event
registers are not changed.
With automatic output off enabled (:SOURce1:CLEar:AUTO ON or :SOURce2:CLEar:AUTO ON),
the output will remain on if operation is terminated before the output has a chance to turn off
automatically.
To send the IFC command, the controller need only set the IFC line true for a minimum of 100 µs.
LLO (local lockout)
Use the LLO command to prevent local operation of the instrument. After the instrument receives
an LLO command, all of its front panel controls except OUTPUT OFF are inoperative. In this state,
pressing LOCAL will not restore control to the front panel. The
go to local (GTL)
command restores
control to the front panel. Cycling power will also cancel local lockout.
GTL (go to local)
Use the GTL command to put a remote-mode instrument into local mode. The GTL command also
restores front-panel key operation.
DCL (device clear)
Use the DCL command to clear the GPIB interface and return it to a known state. Note that the
DCL command is not an addressed command, so all instruments equipped to implement DCL will
do so simultaneously.
When the Model 6482 receives a DCL command, it clears the input buffer and output queue,
cancels deferred commands, and clears any command that prevents the processing of any other
device command. A DCL command does not affect instrument settings and stored data.
SDC (selective device clear)
The SDC command is an addressed command that performs essentially the same function as the
DCL command. However, because each device must be individually addressed, the SDC
command provides a method to clear only selected instruments (instead of clearing all instruments
simultaneously, as is the case with DCL).
GET (group execute trigger)
GET is a GPIB trigger that is used as an arm event to control operation. The Model 6482 reacts to
this trigger if it is the programmed arm control source. The following command selects the GPIB
arm control source:
:ARM:SOURce BUS
NOTE
With :ARM:SOURce BUS selected and an :INITiate command sent, do not send any
commands (except GET, DCL, SDC, IFC, *TRG, and :ABORt) while performing source
and measure operations (ARM indicator on). If you do, erratic operation will occur.
Summary of Contents for 6482
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