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4.13.1 RO (Output Impedance)
The<100Ω>or<25Ω> can be selected according to the user’s demand.
The varied signal source output impedance will lead to the varied current
or the difference of measuring value. If selecting <25Ω>, then the AC volt-
age range change to 10mV~1Vrms, and the current range is
400µA~40mArms.
4.13.2 ALC (Auto Level Control)
Display ALC ON Display ALC Fail
Display ALC Fail
It is preset as <ALC OFF>. If selecting <ALC ON>, it ensures that the
voltage applied to both ends of Test Piece or the current flowing through
the Test Piece will be consistent with the parameter set value. If selecting
<ALC ON>, because the instrument needs to calculate the voltage and
the current for adjusting the output, it will increase the time required for
the measuring. If the Auto Level Control cannot achieve the range to be
set, the page will display < ALC unable to regulate> message, and it rec-
ommend setting as <ALC OFF> because it will affect the measuring speed.