
2-42 Agilent B1500A/B1505A Programming Guide, Edition 11
Remote Mode Functions
Measurement Modes
C-t Sampling Measurements
C-t sampling measurement is performed as shown below. The sampling operation is
performed in the specified time interval until when the total sampling time runs over
Bias hold time + Sampling interval × number of samples.
Before performing the measurement, select the measurement parameters by using
the IMP command. And select the output data by using the LMN command.
Figure 2-26 C-t Sampling Measurements
1. The sampling condition is set by the MTDCV and MSC commands.
2. The CMU sets the DC bias output by the MDCV command.
3. The CMU starts AC signal output by the FC and ACV commands.
4. (optional) The source channels set by the DI/DV commands will start output at
the timing of the DI/DV command execution.
5. The CMU starts the base value output by a trigger, such as the XE command.
6. After the base hold time, the CMU changes the output to the bias value. The
CMU keeps the value until the end of the sampling measurement.
7. And after the bias hold time, the CMU starts measurement for the first point.
8. After that, the following operation is repeated with Sampling interval.
• CMU starts measurement if it is ready to measure.
• CMU keeps the condition if it is busy.
Voltage or current
DV/DI
MTDCV/MSC /
MDCV/FC/ACV
Measurement trigger (e.g. XE)
Measurement time
SMU output
CMU output
Setup value
Previous value
Bias value
Previous value
DC bias
Time
: Measurement
Base hold time
Bias hold time
Base value
Sampling interval
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