This makes things even more strange of how data is packed. I'm getting samples, for example , 236775168, which is way more than 2^24. May be the data is shifted 8 bits to MSB? I'm dividing the samples by 2^31 - 1, the end of scale of 32 bits.
- Rafael
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On 2/4/24 21:07, Gordon Gibby wrote:
Those are 24 bit a to D ?converters. ?They have 80 to 90 DB dynamic ranges from the spec sheet. They are 30 or 40 or 50 DB more than we need!
Some people are selling systems with only eight bit eight bit ADC and that sounds pretty crappy but these are astonishingly good
On Feb 4, 2024, at 16:03, Dave, N1AI <n1ai@...> wrote:
?On Sun, Feb 4, 2024 at 03:48 PM, Gordon Gibby wrote:
Dave, to give an accurate answer will take a little bit of study,
but remember these things work in an environment of positive
supply voltages, without any negative supply voltage. So it’s
likely that they only measure positive voltages. There are no
negative voltages. And it’s also likely that the analog to
digital converter is CD quality, with far more bits than our
communications grade channel can support with a normal
transceiver. So wasting 3DB worth of dynamic range may be
negligible. I think I remember comments to that subject much
earlier, when I get the chance I’ll go back and look at it, busy
trying to make measurements to protect our new EOC from noise
generators… Head is spinning with numbers
Thanks, Gordon, for the insights.? They are a good start!
--
Regards,
Dave, N1AI
