Timeline for What is the analog bandwidth of general purpose ADCs?
Current License: CC BY-SA 3.0
7 events
| when toggle format | what | by | license | comment | |
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| Feb 13, 2016 at 8:06 | comment | added | br4him | I was trying to sample an IF signal without having to downconvert it to baseband. It was a low IF signal ~ a few Megs. Anyway, the project is over now, I was able to use a professional digitizer that could go to 60 MHz instead. Thanks again :) | |
| Feb 13, 2016 at 5:07 | comment | added | webmasterpdx | I guess my question is why are you undersampling? What are you trying to achieve by doing so? There might be another way to achieve what you want if I knew what you were trying to do. the only application that I'm aware of for undersampling might be to reconstruct a higher frequency repetitive signal, which coul be done by undersampling. Is it something like that? | |
| Feb 11, 2016 at 10:28 | comment | added | br4him | I meant that I am sampling the signal way below its Nyquist frequency (taken to be double the highest frequency component) and I was worried that the signal would be attenuated by the ADC since the analog bandwidth of the ADC wasn't specified and there's no guarantee that it'll allow signals way above the ADC's sampling rate without attenuation. | |
| Feb 11, 2016 at 9:44 | comment | added | webmasterpdx | What do you mean by "undersampling scheme"? Do you mean it's a repetitive signal and by sampling at a non-harmonic of the fundamental frequency, you are trying to reconstruct the signal? | |
| Feb 10, 2016 at 8:42 | comment | added | br4him | Thanks for your input, that is the problem, I was not trying to "use the device as specified" I was trying to sample a signal that is centered around a few MHz while the ADC could only go for hundred kHz. I was trying to implement an undersampling scheme. So I had to worry about the analog bandwidth, I didn't want my signal to be attenuated by the sample & hold circuitry which may act as a filter. Ultimately I changed the IF frequency to be within the ADCs specs. | |
| Jan 25, 2016 at 5:11 | history | edited | webmasterpdx | CC BY-SA 3.0 | added 504 characters in body |
| Jan 25, 2016 at 4:43 | history | answered | webmasterpdx | CC BY-SA 3.0 |