Discussion
What is slope overload in a delta modulator?
Answer: C
Slope overload occurs when the input's rate of change exceeds the step size times the sampling rate, so the staircase cannot keep up. The remedy is a larger step or a faster clock, and adaptive delta modulation varies the step for exactly this reason. Drift and quantiser saturation describe other things, and an inadequate sampling rate is aliasing. A tracking system fails when the target moves faster than the tracker can, which is a limitation shared by every feedback quantiser.
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