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Lena/Sep 2016: Difference between revisions
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ElenaZhivun (talk | contribs) |
ElenaZhivun (talk | contribs) |
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Talked to Mike about the insufficient bit resolution problem. Mike says the correct averaging should give us effectively more bits http://www.analog.com/library/analogDialogue/archives/40-02/adc_noise.html
This should work as long as we increase the number of bits after the averaging.
== 09/08/2016 ==
Implementing Mike's suggestions in LabVIEW (because it's easier to change the code than the hardware). The code mostly works, but still needs some debugging to make it compatible with the heartbeat recording VI.
Changes done:
# Data is acquired at the maximum ADC rate of 500 ksps
# Raw ADC data is scaled up to int32 from int16 and anti-aliased by a rational resampler. The output data rate is ~20 ksps (2011 ticks at 40 MHz instead of expected 2000 ticks).
# Data is low-pass filtered at 250 Hz by a 6-pole Bessel filter.
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