问题：
Unlike other DSO's+ when a channel coupling is set to ground there's a perfectly flat baseline (i.e. no noise) - what's going on?
答案：
When an input channel is set to ground, the scope simply draws a horizontal vector at the 0V position. Since the A/D isn't involved, the quantizing noise visible on most other DSO's isn't present.
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常见问题 ID 57656
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