Soft Rock exciter update
Alberto di Bene
dibene at usa.net
Mon Oct 2 14:31:46 CDT 2006
Robert E. Seastrom wrote:
> Mike O'Dell <mo at ccr.org> writes:
>> the head-slapper is the "digital oscilloscope" pods
>> these are USB2.0/Firewire boxes with front-ends and
>> high-quality A/D converters. they routinely have
>> decent bandwidth out beyond 1 MHz. they aren't
>> very expensive, either, and you get an oscilloscope
>> in the bargain. almost all of them have at least
>> 2 channels and BNC inputs.
> heh, why didn't someone think of that sooner?
Probably because for a digital oscilloscope 8 bits of ADC resolution are enough, and 12 an overkill, which cannot be
said for an SDR application.... with today's standards one should aim for a dynamic range of 120dB, and this implies at
least 20 *real* bits of amplitude resolution, rarely, if ever, reached by the so-called 24-bit sound cards....
73 Alberto I2PHD
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