adc2:simulations:fft_freq_mismatch
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adc2:simulations:fft_freq_mismatch [2009/11/20 23:15] szymon.kulis |
adc2:simulations:fft_freq_mismatch [2019/03/08 14:08] (current) |
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| + | {{:adc2:simulations:fsim_diff_log.png|}} | ||
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| + | **remark** : 1%@20Mhz@16kp = 12.7 Hz | ||
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| + | **conclusion** : if we want to achive resonable measurement resutls for 10-bit ADC working @ 20 Mhz (and with 16k FFT len) input signal freq should not differ from ideal one more then ~1 Hz. | ||
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| + | **conclusion 2 ** : reducing lenght of FFT (fbase is becoming larger) should relax this requirement (but also degrade precision of measurement) | ||
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