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3 - Programming the DC Source
28
Measuring Output Pulses (Agilent 66312A, 66332A Only)
Current Detector
Check that the current detector is set to ACDC when measuring current pulses or other waveforms with a
frequency content greater than a few kilohertz.
SENSe:CURRent:DETect ACDC
Only select DC as the measurement detector if you are making only DC current measurements and you
require a measurement offset better than 2mA on the High current measurement range. Note that this
selection gives inaccurate results on current waveforms that have ac content.
SENSe:CURRent:DETect DC
Pulse Measurement Queries
The dc source has several measurement queries that return key parameters of pulsewaveforms as shown
in Figure 3-4.
FETC:CURR:LOW?
FETC:VOLT:LOW?
FETC:CURR:MIN?
FETC:VOLT:MIN?
FETC:CURR:HIGH?
FETC:VOLT:HIGH?
FETC:CURR:MAX?
FETC:VOLT:MAX?
DATA POINTS
Figure 3-4. Measurement Commands Used to Return Pulse Data
To return the maximum or minimum value of a pulse waveform use the following commands. Note that
the data points of the measurement sample may not coincide with the actual maximum or minimum point
on the waveform.
FETCh:VOLTage:MAXimum? or
FETCh:VOLTage:MINimum?
FETCh:CURRent:MAXimum? or
FETCh:CURRent:MINimum?
The average value of the high level or low level of a pulse can also be measured. To return the average
value of the high level, use:
FETCh:CURRent:HIGH? or
FETCh:VOLTage:HIGH?
To return the average value of the low level, use:
FETCh:CURRent:LOW? or
FETCh:VOLTage:LOW?