[time-nuts] 31bit ADC, 1000 samples per second
lists at rtty.us
Mon Dec 10 21:30:41 UTC 2012
I suspect you can prove it mathematically. You could also just sit there and watch what it puts out for a year or so. With a reasonable ramp it likely would put out all codes. That's not to say you could prove they are in order, only that you saw all 4 billion codes. More or less:
1,000 samples a second, 4 billion codes -> you need 4 million seconds if everything works perfectly. 10X that number is probably adequate to catch them all.
On Dec 10, 2012, at 3:53 PM, Didier Juges <shalimr9 at gmail.com> wrote:
> I do not understand how anyone can guaranty no missing codes when the lower
> 11 bits are essentially noise? (31 bits resolution versus 20 effective bits)
> On Mon, Dec 10, 2012 at 2:19 PM, <lists at lazygranch.com> wrote:
>> It is 31 bits with no missing codes. Usually missing codes is of concern
>> in feedback systems, but I don't see the use in a geophone. Perhaps they
>> will average the digital signal further to reduce the noise, hence the
>> noisy bits.
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