| Electronics > Beginners |
| Rogol 1054Z actual bandwidth |
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| Tepe:
--- Quote from: rhb on November 09, 2019, 10:51:04 pm ---The Nyquist for the DS1054Z displaying 3-4 channels is 125 MHz. --- End quote --- And for the DS1104Z? |
| tooki:
--- Quote from: Tepe on November 10, 2019, 10:39:54 am --- --- Quote from: rhb on November 09, 2019, 10:51:04 pm ---The Nyquist for the DS1054Z displaying 3-4 channels is 125 MHz. --- End quote --- And for the DS1104Z? --- End quote --- Same. There’s no difference in the hardware. The 1104Z just comes with the 100MHz analog filter enabled instead of the 50 or 70MHz one. |
| radiolistener:
--- Quote from: tooki on November 10, 2019, 11:18:42 am ---Same. There’s no difference in the hardware. The 1104Z just comes with the 100MHz analog filter enabled instead of the 50 or 70MHz one. --- End quote --- 100 MHz filter leads to worse aliases than 50 or 70 MHz one. So 100 MHz will have even worse aliases. |
| tooki:
--- Quote from: radiolistener on November 10, 2019, 01:29:45 pm --- --- Quote from: tooki on November 10, 2019, 11:18:42 am ---Same. There’s no difference in the hardware. The 1104Z just comes with the 100MHz analog filter enabled instead of the 50 or 70MHz one. --- End quote --- 100 MHz filter leads to worse aliases than 50 or 70 MHz one. So 100 MHz will have even worse aliases. --- End quote --- While that is true, my answer is 100% correct. The question was what the Nyquist frequency was. And it’s absolutely unchanged at 125MHz (1/2 of the 250MS/sec sample rate), regardless of what filter is ahead of it. And there is no hardware difference between the three models — they differ only in which filter the firmware enables. |
| Fungus:
--- Quote from: Tepe on November 10, 2019, 10:39:54 am --- --- Quote from: rhb on November 09, 2019, 10:51:04 pm ---The Nyquist for the DS1054Z displaying 3-4 channels is 125 MHz. --- End quote --- And for the DS1104Z? --- End quote --- The same - it's the exact same hardware. Remember that with 2 channels on, Nyquist is 250Mhz and with 1 channel it's 500Mhz. Hence my comment about turning off one of the other channels if something is really critical. You can always get a good display on the DS1054Z, it's just something you need to be aware of when you're using the scope with all channels enabled (ie. that any Gibbs phenomenon will be more pronounced, etc.) Back in reality: You'll find your probing technique is far more critical for reducing artifacts than this problem is. |
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