Agilent Technologies B1500A Manual de servicio Pagina 121

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Agilent B1500A/B1505A Programming Guide, Edition 11 2-35
Remote Mode Functions
Measurement Modes
Figure 2-22 shows an example to use a SMU for the DC bias sweep source. This
example uses the CMU for the constant voltage output and the capacitance
measurement, the SMU1 for the constant voltage output and the current or voltage
measurement, and the SMU2 for the DC bias sweep output and the current or
voltage measurement. To perform this measurement, a bias-tee is required. And the
CMU and the SMU2 must be connected as shown below.
CMU: RF signal input of bias-tee
SMU2: DC bias input of bias-tee
The output of the bias-tee must be connected to a DUT terminal.
This example uses the PAD1 command to perform the parallel measurement by the
SMU. The SMU starts measurement simultaneously after the delay time and the
CMU starts measurement after the measurement is completed by the SMU.
Figure 2-22 CV (DC bias) Sweep Measurements by MM18,CMU,SMU1,SMU2 and PAD1
DC bias
Stop value
Start value
Previous value
Time
: Measurement
Hold time
Step delay time
Trigger (e.g. XE)
WTDCV/WMDCV/WDCV
Delay time
Step delay time
Delay time
FC/ACV/ DCV
DV
SMU2
SMU1
CMU
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