Measurement examples
Example 1
Consider a case where you need to measure two sinusoidal waveforms that are 180° out of phase with each other
, each with an amplitude
of 1000 V
pk
with no DC offset (centered at 0 V).
Figure 6: Measuring two equal-amplitude waveforms that are 180 degrees out of phase
If both waveforms are at the same voltage potential, then the dif
ferential measurement would be 2 times the individual signal inputs (in
this example, 2000 V
pk
). Looking at the maximum measurable differential voltage specifications for the THDP/TMDP series probes, the
THDP0100 probe is capable of measuring this signal. See Typical characteristics on page 40. For reference, the rms values of the
Common-Mode Voltage and Voltage-to-Earth ratings and Maximum Input Signals for each probe model are shown in the figure above.
Operating basics
36
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