Keithley 2016 - Page 63

Configuring and using the internal sweep
(remote operation only)
The Model 2016's internal source can be set to sweep up to 200 frequencies and then return
the distortion and/or RMS volts for each frequency. Sweep results can be returned using the
SREAL data format (fastest—IEEE754 single precision), DREAL data format (IEEE754
double precision), or in ASCII (default). The sweep uses the present distortion measurement
settings and must be allowed to complete before requesting the data (otherwise the data will be
incomplete). Sweep end can be detected by reading bit 3 of the Operation Event register
(:stat:oper?) which is set to 1 at the end of a sweep. Bit 3 of the Operation Event register can
also be used to trigger a service request when the sweep is completed.
The output sweep can only be performed in distortion mode. When performing a sweep, use
SET mode for the distortion frequency acquisitions mode for maximum speed (remote
command is :sens:dist:freq:auto off).
NOTE Do not place the unit in autorange mode while sweeping. A value of +812 (not
permitted in autorange) will be returned if this command is issued while in autorange
mode. Refer to Appendix B for a complete list of status and error messages.
:OUTPut:LIST:MODE LIST ;Sets single frequency or sweep mode
:OUTPut:LIST <ampl1>, <freq1>, <ampl2>, <freq2>… ;Creates a sweep list (50 points
max)
:OUTPut:LIST:APPend: <ampl#x>, <freq#x> ;Adds additional points to the existing
sweep list (change trigger count to match
number of points)
:OUTPut:LIST:ELEMents DIST,AMPL ;Selects data to be returned (distortion,
RMS volts, or both)
:OUTPut:LIST:DELay xxx.xxx ;Sets the source delay time (the time
between setting the source and taking the
measurement) in seconds
:TRIGger:COUNt xx ;Sets the number of measurements to make
during the sweep; must equal the number
of sweep points
:OUTPut ON ;Output must be on before starting sweep
:INIT ;Starts the sweep
:OUTPut:LIST:DATA? ;Returns the list of sweep data in the format
<dist1>, <ampl1>, <dist2>,… (dependent
on data elements selected)
Basic Measurements 2-39