Keithley 6482, Справочное руководство

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6482-901-01 Rev. A / August 2012 Return to Section Topics 14-5
Model 6482 Dual-Channel Picoammeter / Voltage Source Reference Manual Section 14: Common Commands
*TRG programming example
The command sequence in Table 14-4 configures the Model 6482 to be controlled by bus triggers.
The last command, which sends a bus trigger, triggers one measurement. Each subsequent bus
trigger will also trigger a single measurement.
NOTE
With :ARM:SOURce BUS selected, do not send any commands (except *TRG, GET,
DCL, SDC, IFC, and ABORt) while performing source-measure operations. If you do,
erratic operation will occur.
*TST? — Self-test query
This command runs a self test and reads the result. Use this query command to perform a
checksum test on ROM. The command places the coded result (0 or 1) in the output queue. When
the Model 6482 is addressed to talk, the coded result is sent from the output queue to the
computer.
A returned value of zero (0) indicates that the test passed, and a value of one (1) indicates that the
test failed.
*WAI — Wait-to-continue
Effectively, the *WAI command is a No-Op (no operation) for the Model 6482 and thus, does not
need to be used.
The *WAI command is used to suspend the execution of subsequent commands until the device
operations of all previous overlapped commands are finished. The *WAI command is not needed
for sequential commands.
Two types of device commands exist:
• Sequential commands : A command whose operations need to finish before the next
command is executed.
• Overlapped commands : A command that allows the execution of subsequent commands
while device operations of the overlapped command are still in progress.
Table 14-4
*TRG programming example
Command Description
*RST
:ARM:SOUR BUS
:ARM:COUN INF
:OUTP1 ON
:INIT
*TRG
Restore GPIB defaults.
Select BUS control source.
Set arm layer count to infinite.
Turn on output.
Take Model 6482 out of the idle state.
Trigger one measurement.