Technical data

2-34 Agilent B1500A/B1505A Programming Guide, Edition 11
Remote Mode Functions
Measurement Modes
NOTE The WTDCV command sets the hold time, delay time, and step delay time.
The WMDCV command sets the automatic abort function and the output after
measurement.
The WDCV command sets the DC bias sweep voltage. The start and stop values
must have the same polarity for log sweep.
The FC command sets the AC signal frequency.
The ACV command specifies the oscillator level, and applies the AC signal.
If the SCUU (SMU CMU Unify Unit) is connected to the CMU and two
MP/HRSMU modules correctly, the source module is automatically selected by the
sweep range (from start to stop). The CMU is selected if it is ±25 V or less (setting
resolution: 0.001 V), or the SMU is selected if it is greater than ±25 V (setting
resolution: 0.005 V).
To Stop Sweep
Output
An automatic abort function is available. Refer to “Automatic Abort Function” on
page 2-46.
To Use SMU for
Measurement
SMU can be used for current or voltage measurement in the CV (DC bias) sweep
measurement mode by adding the SMU channel number after the CMU channel
number of the MM18 command. See Figure 2-21 and Figure 2-22. For these
measurements, the SMU starts measurement after the delay time and the CMU starts
measurement after the measurement is completed by the SMU.
Figure 2-21 shows an example to use a SMU additionally to the above example
shown in Figure 2-20. The SMU1 is used for the constant voltage output and the
current or voltage measurement.
Figure 2-21 CV (DC bias) Sweep Measurements by MM18,CMU,SMU1
DC bias
Stop value
Start value
Previous value
Time
: Measurement
Hold time
Step delay time
Trigger (e.g. XE)
WTDCV/WMDCV/WDCV/FC/ACV
Delay time
Step delay time
Delay time
DV
SMU1
CMU