Keithley 6485, User Manual

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Model 6485 and 6487 User’s Manual Buffer and Sweeps 6-5
Model 6487 voltage sweeps
The Model 6487 voltage source can be used to generate voltage sweeps from a start volt-
age to a stop voltage at discrete step voltages. The Model 6487 stores readings in the
buffer for later recall, one set of readings per voltage step.
Front panel sweeps
To generate sweeps from the front panel, press CONFIG then OPER, select SWEEP, then
press ENTER. At the prompts, enter the start, stop, and step voltages, and the delay time
(time between each voltage step and measurement). Note that sweeps can be positive-
going or negative-going by programming the start and stop voltages accordingly, but the
programmed step voltage is always positive. The SCAN annunciator will turn on to indi-
cate that the sweep is armed.
To start a sweep, press the TRIG key. The sweep will be performed and readings will be
stored in the buffer for later recall (see
“Recall,” page 6-2 ). To abort a sweep in progress,
press the EXIT key.
SCPI programming — sweeps
NOTE When programming sweeps via remote, the arm count may have to be reset to
initiate after *RST. See Section 7 of the Model 6487 Reference Manual for
details on triggering.
Table 6-2
SCPI commands — sweeps
Commands Description
SOUR:VOLT:SWE:STAR <Volts>
SOUR:VOLT:SWE:STOP <Volts>
SOUR:VOLT:SWE:STEP <Volts>
SOUR:VOLT:SWE:CENT <Volts>
SOUR:VOLT:SWE:SPAN <Volts>
SOUR:VOLT:SWE:DEL <Delay>
SOUR:VOLT:SWE:INIT
SOUR:VOLT:SWE:ABOR
SOUR:VOLT:SWE:STAT?
INIT Program start voltage: -505V to 505V.
Program stop voltage: -505V to 505V.
Program step voltage: -505V to 505V.
Program center voltage: -505V to 505V.*
Program span voltage: 0V to 1010V.*
Set delay between voltage step and measurement: 0 to 999.9999s.
Arm sweep, put source in operate.
Abort sweep, put source in standby.
Query if sweep still running: 1 = sweep in progress.
Trigger sweep.
* CENTer and SPAN are alternate methods of setting sweep parameters. They are coupled with STARt and STOP com-
mands.