2640A/2645A NetDAQ
Users Manual
C-2
1.0000V ac (the dc component equals 0). However, consider the 2V (peak-to-
peak) square wave.
Both types of measurement correctly display the dc component (0V), but the
NetDAQ instrument also correctly measures the ac component (1.0000V). The
average-responding device measures 1.11V, which amounts to an 11% error.
Average-responding measurement devices have been in use for a long time; you
may have accumulated test or reference data based on such instruments. The
conversion factors in Figure C-1 can help in converting between the two
measurement methods.
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