Keithley 6482 - Configure and Control Buffer

6482-901-01 Rev. A / August 2012 Return to Section Topics 16-57
Model 6482 Dual-Channel Picoammeter / Voltage Source Reference Manual Section 16: SCPI Command Reference
Configure and control buffer
FREE?
:TRACe:FREE? Read status of memory
Description This command is used to read the status of storage memory. After sending this
command and addressing the Model 6482 to talk, two values separated by
commas are sent to the computer. The first value indicates how many bytes of
memory are available, and the second value indicates how many bytes are
reserved to store readings.
POINts <n>
:TRACe:POINts <n> Specify buffer size
Parameters <n> = 1 to 3000 Specify buffer size
MINimum 1
MAXimum 3000
DEFault 100
Query :POINts? Query buffer size
:POINts? MINimum Query smallest allowable buffer size
:POINts? MAXimum Query largest allowable buffer size
:POINts? DEFault Query *RST default buffer size
Description This command is used to specify the size of the buffer.
ACTual?
:TRACe:POINts:ACTual? Query number of stored readings
Description This query command is used to determine how many stored readings are in the
buffer. After sending this command and addressing the instrument to talk, the
number of readings stored in the buffer will be sent to the computer.
CONTrol <name>
:TRACe:FEED:CONTrol <name>Start or stop buffer
Parameters <name> = NEXT Fills buffer and stops
NEVer Disables buffer storage
Query :CONTrol? Query buffer control
Description This command is used to select the buffer control. When NEXT is selected, the
asterisk (*) indicator turns on to indicate that the buffer is enabled. The storage
process starts when Model 6482 is taken out of idle to perform source-measure
operations.
After the buffer stores the specified number of reading arrays (as set by the
:POINts command), the asterisk annuciator turns off to indicate that storage is
done.
With NEVer selected, storage into the buffer is disabled.