[time-nuts] Re: Accuracy of a sound card

David Kirkby david.kirkby at onetel.net
Mon Aug 22 18:06:49 EDT 2005

Alberto di Bene wrote:
> Tom Van Baak wrote:
>>I measured the phase, frequency and Allan deviation of
>>the sound card on my cheap PC. You'll enjoy the results:
>>If any of you with a high-end sound card want to repeat
>>the experiment let me know.
> Unfortunately, while my 5328B has the HPIB interface, my PC doesn't, so
> I cannot collect data automatically, otherwise it would have been a very
> interesting experiment...
> 73  Alberto  I2PHD

If your PC has an ISA slot, or you have an older PC with an ISA slot, 
then a GPIB board is not that expensive on eBay. Just save yourself a 
lot of hassle and get one from National Instruments, as they are better 
supported than other makes.

PCI GPIB cards are current, and so are *much* more expensive.

I guess a modern sound card will not fit in an old PC with an ISA slot, 
but there is nothing to stop you using a modern PC with the high-end 
sound card, and an old PC with a cheap ISA card for the data collection.

There are free drivers for FreeBSD, linux and possibly Windoze, but I am 
not sure about the latter.

David Kirkby,

Please check out http://www.g8wrb.org/
of if you live in Essex http://www.southminster-branch-line.org.uk/

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