Measurement
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2. The Voltage Level or Current Level is enabled depending on your dc
bias mode selection. For example, if you have selected DC Bias > DC
Bias Mode > Voltage, then Voltage Level is enabled. then, press the
Voltage Level and input the desired voltage level value.
Setting limits for dc voltage
When constant voltage or current is selected for the dc bias mode, follow
the steps below to set limit values for the voltage (upper and lower limits)
in order to protect the DUT being measured.
To set the maximum limit voltage:
1. Press Sweep Setup.
2. Press DC Bias > Max Limit Voltage and input the maximum limit
value.
To set the minimum limit voltage:
1. Press Sweep Setup.
2. Press DC Bias > Min Limit Voltage and input the minimum limit value.
The dc voltage limit values specified by the Max Limit
Voltage or Min Limit Voltage key take effect when the dc bias
mode is constant voltage or current. The setting for these
values is disabled when the dc bias mode is set to non-
constant.
Setting dc bias range to 1 mA
Set the dc bias range before turning the dc bias ON. The dc bias range is
set to optimize the dc current given to the impedance measurement
circuit. This setting affects the accuracy of the impedance measurement
regardless of which dc bias mode is selected or whether dc bias is turned
ON or OFF. Normally, maximum accuracy can be obtained by setting the dc
bias range as narrow as possible. An initial dc bias range of 1 mA is
recommended for the first measurement when dc bias is applied.
When you do not apply dc bias, always set the dc
bias range to 1 mA, which is the preset setting. Keeping this
setting is especially important when you run through the
sequence of applying dc bias, turning off dc bias, and then
performing a measurement.
1. Press Sweep Setup.
2. Press DC Bias > Meas Range and set the dc bias range to 1 mA.
Always set the dc bias range to 1 mA when you
measure without applying dc bias.
Turning dc bias ON or OFF
1. Press Sweep Setup.
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