DescriptionInverter output of an APC Smart-UPS SMT1500I.jpg
English: An oscillogram showing the inverter output of an APC Smart-UPS SMT1500I, recorded while this UPS was running off its batteries with a 0% load. Obviously, this confirms a true sine-wave nature of the output.
Taken with a UNI-T UT81B handheld digital oscilloscope.
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