LCR-8000 Series User Manual
32
Setting measurement level/ALC/RO
LCR-8200 Series test signal voltage/current level can be set as the
effective value (RMS value) of a sine wave of the test frequency
from the unit’s internal oscillator. The voltage range is 10mV-
2Vrms and current range is 100uA-20mArms. 2Vrms can only be
used at <= 1MHz.
The ALC (automatic level control) feature adjusts the voltage across
the DUT or the current through the DUT to match the
voltage/current level setting. Using this feature, you can try to
ensure a constant signal level (voltage or current) is applied to the
DUT.
In situations when the actual measuring Vac or Iac goes beyond the
extent that the ALC can regulate, a warning message, “ALC unable
to regulate”, will be shown at the bottom of the screen.
An asterisk will be shown beside the LEVEL V or A unit when the
ALC is turned on.
The RO (output impedance) can be set to 25Ω or 100Ω.
The varied signal source output impedance will lead to the varied
current or the difference of measuring value. If selecting <25Ω>,
then the voltage range is 10mV~1Vrms and the current range is
400uA~40mArms. If it needs to compare test results with Keysight
select 100Ω.
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