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Trying to display bandwith via Math on Siglent SDS2k+/2kHD/800X HD
Performa01:
--- Quote from: Martin72 on July 21, 2023, 11:06:31 am ---edit forget the second marker...
--- End quote ---
Forget the first marker too. You made the same mistake as I did back then (rf-loop pointed it out). You cannot place a marker at 1 MHz when the FFT frequency step is 24.41 MHz...
gf:
--- Quote from: Performa01 on July 22, 2023, 07:38:34 am ---
--- Quote from: Martin72 on July 21, 2023, 11:06:31 am ---edit forget the second marker...
--- End quote ---
Forget the first marker too. You made the same mistake as I did back then (rf-loop pointed it out). You cannot place a marker at 1 MHz when the FFT frequency step is 24.41 MHz...
--- End quote ---
Btw, I don't know where this comes from, but the 0.5 dB drop in the DC bin doesn't look right either. So I would not use this bin as reference level.
Martin72:
I´ll repeat the measure... ;)
Martin72:
Am I just about to...
Quick question:
It was interpolated 20-fold according to the entered formula.
Before I set the acquisition mode to average, 40GSa/s came out, see the pictures before the last one.
Now that I have last set to average 32, it is 400GSa/s (see last picture) is that correct ?
Martin72:
OK, finished for today... ;)
This time I used the cursors for finding the -3dB frequency, that should be "allowed" for this.
1.5Ghz span and 5dB/div settings, 515Mhz....
--- Quote ---Btw, I don't know where this comes from, but the 0.5 dB drop in the DC bin doesn't look right either.
--- End quote ---
I´ve "zoomed in" using a span of 500Mhz, when the Delta f is a bin (?), than it "happens" in exact the first one, 0Hz..24.41Mhz.
From 24.41(24.5 marked)Mhz down to 0 it´s -3dB.
(possibility to change the axis-labeling left/right would be very, very useful for a better viewing.)
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