[time-nuts] Win XP and NIST time

David I. Emery die at dieconsulting.com
Tue Mar 26 21:08:32 EDT 2013

On Tue, Mar 26, 2013 at 07:39:51PM +0100, Alberto di Bene wrote:
> On 3/26/2013 7:21 PM, Dan Kemppainen wrote:
> >Keep in mind, we are after all, taking about windows. An operating
> >system that IS NOT real time operating system. (You think it is, try
> >move a continuous stream of a few 6+ MBytes/Sec data to it!)
> Well, the Perseus SDR, when set to its maximum sampling rate after the DDC, 
> sends
> the I and Q continuous streams (24 bit/sample each), to the PC at a rate of 
> 2 MHz. This
> means 12 MBytes/sec via a high speed USB2 port. Using one the many 
> available SDR
> programs, those 12 MBytes/sec are received, FIR and FFT are applied, 
> demodulation
> algorithms are used, and there are no glitches in the final audio...  if 
> even a single sample
> would be lost, you would ear immediately the artifact....
> Windows is not as bad as somebody would depict it... :-)

	I have been using Windows for digital video analysis and
capture for years... often capture multiple 70-80 mb/s transport streams
by the hour from USB and PCI sources and output similar for testing.

	It works.

	Does take buffering and tuning in the code, and some in the

  Dave Emery N1PRE/AE, die at dieconsulting.com  DIE Consulting, Weston, Mass 02493
"An empty zombie mind with a forlorn barely readable weatherbeaten
'For Rent' sign still vainly flapping outside on the weed encrusted pole - in 
celebration of what could have been, but wasn't and is not to be now either."

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