Tektronix Keithley 2651A Reference Manual page 104

Model 2651A High Power System SourceMeter® Instrument Reference Manual
Selecting the FAST menu item selects the fast analog-to-digital converter (ADC). All other menu
items on the speed menu select the integrating ADC.
Setting the speed using the remote interface
The following table summarizes commands to control speed. See
7-1) for more information.
Speed commands
Command
smua.measure.nplc = nplc
smua.measure.adc = adc
Speed programming example
Use the NPLC command to set the speed of the integrating analog-to-digital converter (ADC). The
programming example below illustrates how to set the speed to 10 PLC:
-- Set NPLC to 10.
smua.measure.nplc = 10
Sampling speed programming example
Use the measure interval to control the sampling speed of the fast ADC. The programming example
below illustrates how to configure the fast ADC to take 1000 measurements with 10 µs sampling
interval:
-- Select fast ADC.
smua.measure.adc = smua.ADC_FAST
-- Set measure count to 1000 readings.
smua.measure.count = 1000
-- Set sampling interval to 10 us (microseconds).
smua.measure.interval = 10e-6
2651A-901-01 Rev. C October 2021
TSP command reference
Description
Sets the speed of the integrating ADC only (nplc can range from
0.001 to 25).
Selects analog-to-digital converter (adc =
smua.ADC_INTEGRATE or smua.ADC_FAST).
Section 2: General operation
(on page
2-79