| 摘要 |
PROBLEM TO BE SOLVED: To automatically adjust at high speed the relative position between an indicated waveform and a mask to avoid collision of the waveform within rating against the mask. SOLUTION: A take-in circuit 110 takes in a plurality of samples of a waveform, a controller 130 generates mask pixel data defining a mask, a raster memory 150 stores the samples of waveform and the mask pixel data, a rasterizer 140 reads the stored content of the master memory to judge in approximately real time if the samples of waveform are written on memory areas for the mask pixel data, and if the waveform collides against the mask according to this judgement, it generates a collision signal.
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