[ntp:questions] re-engineering pc motherboards, was Re: PCI add on oscillator

rtxo gnu at wraith.sf.ca.us
Fri Apr 29 16:04:49 UTC 2005


Joshua Coombs wrote:
> Given standard pc clocks are less than ideal, with wide drift, etc, does 
> anyone make a good quality oscillator as an add in, say via PCI? Ideally 


If you have an external reference (LORAN disciplined OCXO, Rubidium, Cesium)
then you could use the "Rubidium PC:"


http://www.moshier.net/#Rubid_pc

A slightly less ambitious (read expensive) hack would be this TCXO:

http://www.maxim-ic.com/quick_view2.cfm/qv_pk/3476

The problem with the DS4000 is its LPBGA package makes it less than
convenient to hack around with.

Cheapest of all is to buy a dozen or so higher quality RTXO's from
an electronics distributor such as Mouser:

p/n 695-HC49US-143  (pg 530 of catalog 618)

This is a +/- 30ppm crystal that might be better than your existing
motherboard's crystal.

../Steven



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