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Figure 17
The Sustain pulse is developed using a similar circuit as the Scan Pulse. A series
of specifically timed pulses are applied to FET drivers creating the distinctive
sustain pulse. The drivers switch the voltages (150V, 155V and 175V) at selected
intervals determined by the D board. The basic waveform remains constant but
the exact number of sustain pulses is determined by the amount of luminance
required, see figure 17.
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