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Altera_Forum's avatar
Altera_Forum
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14 years ago

FFT Frequency Range

I am using the 50MHz internal clock of the Stratix III to collect samples of a chirp signal operating at 30kHz to 80kHz. I read in one of the forums that the FFT MegaCore output frequencies are 0~Fs...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
14 years ago

Ok, I think I have the ADC and FFT clocks working correctly, but I am still having issues syncing them with SignalTap. If I use a PLL block, SignalTap doesn't recognize it as an available clock. If I use a clock_derived block and use it for SignalTap, then SignalTap never stops collecting data; when I click "Acquire," SignalTap just freezes and I have to force quit Matlab. How do you suggest I slow down the SignalTap data acquisition so it is in sync with the FFT output data? Sorry to keep bugging you, but I feel like I'm getting close to making this thing work.

Thanks again,

Cory