Hans Glitsch wrote:
I want to change the clock on the usrp. Anyone know of a mail order
place that would have the right kind of vctcxo at 38.4MHz ? I tried
Digikey and Mouser. no luck.
Based on the common frequency table here:
http://www.cardinalxtal.com/common-frequencies.htm
it doesn't look like it's going to be easy to find a 38.4 MHz vctcxo.
I just spent a decent amount of time looking for more stable clocks to
replace the onboard TCXO. I found that unless you're willing to order a
custom TCXO/OCXO (which is expensive and takes a long time), your best
bet is to choose a frequency which is common, and then use one of those
TCXOs. That way, you get the quantity advantage. For example, a 13 MHz
GPS TCXO that's 0.5 ppm can cost well under $10. (Also, don't forget you
can multiply the clock up, either using a discrete IC, or some transistors.)
-Roshan
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