To correct the rise time of a SMPTE timecode signal, which operation is used?

• A. Normalize
• B. Compress
• C. Reshape
• D. Stabilize

Answer: (C)

Rise time is all about how quickly a signal edge goes from low to high. For SMPTE timecode, getting clean, sharp transitions is essential because the decoder relies on those edges to accurately interpret the data. When the rise time isn’t within spec, the edge can be slow and ambiguous, which can lead to misreadings of the timecode. The way to fix this is to reshape the waveform so the transitions become fast and consistent. This edge shaping, or pulse shaping, tightens the rise time and produces a reliable, repeatable edge that the timecode reader can latch onto.

Normalization would change how strong the signal is, not how quickly it rises. Compression alters the dynamic range or data rate rather than the edge slope. Stabilization targets timing jitter or level stability, not the speed of the edge itself. So reshaping the waveform directly addresses the rise-time issue by making the transitions crisp and within specification, which is why it’s the best fit here.