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| REVIEW - Rigol DS2072 - First Impressions of the DS2000 series from Rigol |
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| marmad:
--- Quote from: Carrington on December 21, 2013, 07:39:12 pm ---@Marmad: The % of blind time (between 200ns and 2ns) in the following table is it real or effective? --- End quote --- Effective blind time. You can see that the active acquisition time is listed as 14x the time base (i.e. the display window - not the 'real' acquisition time). |
| Carrington:
--- Quote from: marmad on December 22, 2013, 08:39:14 pm --- --- Quote from: Carrington on December 21, 2013, 07:39:12 pm ---@Marmad: The % of blind time (between 200ns and 2ns) in the following table is it real or effective? --- End quote --- Effective blind time. You can see that the active acquisition time is listed as 14x the time base (i.e. the display window - not the 'real' acquisition time). --- End quote --- Then the real blind time (%) between 2ns and 200ns would be: 82.46, 88.65, 92.80, 63.06, 81.36, 86.70 and 91.46. So we can say than for these time bases (2ns-200ns) is always better to use 14K? If so, would be interesting an automatic mode that selects the most appropriate memory to get the lowest blind time? What do you think? |
| marmad:
--- Quote from: Carrington on December 22, 2013, 08:49:29 pm ---Then the real blind time (%) between 2ns and 200ns would be: 82.46, 88.65, 92.80, 63.06, 81.36, 86.70 and 91.46. So we can say than for these time bases (2ns-200ns) is always better to use 14K? --- End quote --- It depends what you're doing. For most Normal uses, the effective blind time is, in a sense, the 'real' blind time - because YOU will be blind to it (i.e. it won't appear on the display) even if the DSO is not technically blind to it. So if a glitch happens in the part of acquisition memory that is off-screen, you'll never see it. But when capturing waveforms for later examination (whether just one - as in Single Shot mode - or many - as in Segments), then the 'real' vs 'effective' blind time actually makes a difference. |
| Carrington:
--- Quote from: marmad on December 22, 2013, 09:03:25 pm ---It depends what you're doing. For most Normal uses, the effective blind time is, in a sense, the 'real' blind time - because YOU will be blind to it (i.e. it won't appear on the display) even if the DSO is not technically blind to it. So if a glitch happens in the part of acquisition memory that is off-screen, you'll never see it. But when capturing waveforms for later examination (whether just one - as in Single Shot mode - or many - as in Segments), then the 'real' vs 'effective' blind time actually makes a difference. --- End quote --- I understand: "So if a glitch happens in the part of acquisition memory that is off-screen, you'll never see it." But, can the oscilloscope automatically detect it? |
| TomThomas:
--- Quote from: Carrington on December 22, 2013, 09:10:50 pm --- --- Quote from: marmad on December 22, 2013, 09:03:25 pm ---It depends what you're doing. For most Normal uses, the effective blind time is, in a sense, the 'real' blind time - because YOU will be blind to it (i.e. it won't appear on the display) even if the DSO is not technically blind to it. So if a glitch happens in the part of acquisition memory that is off-screen, you'll never see it. But when capturing waveforms for later examination (whether just one - as in Single Shot mode - or many - as in Segments), then the 'real' vs 'effective' blind time actually makes a difference. --- End quote --- I understand: "So if a glitch happens in the part of acquisition memory that is off-screen, you'll never see it." But, can the oscilloscope automatically detect it? --- End quote --- If you know how the disturbance Looks like you could trigger on that. Digital scopes have this kind of blind time. It's the Technologie... I heard a very nice statement some time ago: Measuring wiht a DSO is like driving a car with closed eyes and just open them from time to time for a very short moment. |
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