Keithley 2000, User Manual, Page: 178 / 280

Speed Commands
:NPLCycles <n>
[:SENSe[1]]:CURRent:AC:NPLCycles <n> Set NPLC for ACI
[:SENSe[1]]:CURRen[:DC]:NPLCycles <n> Set NPLC for DCI
[:SENSe[1]]:VOLTage:AC:NPLCycles <n> Set NPLC for ACV
[:SENSe[1]]:VOLTage[:DC]:NPLCycles <n> Set NPLC for DCV
[:SENSe[1]]:RESistance:NPLCycles <n> Set NPLC for
Ω
2
[:SENSe[1]]:FRESistance:NPLCycles <n> Set NPLC for
Ω
4
[:SENSe[1]]:TEMPerature:NPLCycles <n> Set NPLC for TEMP
Parameters
<n> = 0.01 to 10 Power line cycles per integration
DEFault 1
MINimum 0.01
MAXimum 10
Query
:NPLCycles? Query programmed NPLC value
:NPLCycles? DEFault Query *RST default value
:NPLCycles? MINimum Query minimum NPLC value
:NPLCycles? MAXimum Query maximum NPLC value
Description
The integration period (measurement speed) for the basic measuement func-
tions (except Frequency and Period) is set using the :NPLCycle command.
NPLC (Number of Power Line Cycles) expresses the integration period by
basing it on the power line frequency. For example, for a PLC of 1, the inte-
gration period in seconds would be 1/60 (for 60Hz line power) which is
16.67msec.
:APERture <n>
[:SENSe[1]]:FREQuency:APERture <n> Set aperture for frequency
[:SENSe[1]]:PERiod:APERture <n> Set aperture for period
Parameter
<n> = 0.01s to 1.0s
DEFault 1.0s
MINimum 0.01s
MAXimum 1.0s
Query
:APERture? Query programmed APERture value
Description
The integration period (measurement speed) for Frequency and Period is set us-
ing the APERture command (to set other basic measurement functions, see
:NPLCycle). The unit of measurement for the APERture command is sec-
onds.
5-40 SCPI Command Reference