Jun 8, 2011
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Specifying A rectangular Waveform

1. Levels

“0″ Level: The average voltage of the low part of the waveform.
This voltage level is measured with respect to ground (0 VDC).

“1″ Level: The average voltage of the high part of the waveform.
This voltage level is measured with respect to ground.

Note: This voltage level is sometimes referenced to the input voltage (Vcc).