Lots' of help herein; ...but, also lots' of nay-sayers, too. Don't let the nay-sayers scare you.
A VERY accurate, newbie-based, GPSDO can be built with minimal investment or cost. It's not hard at all. Just Do-It. Mistakes allowed. I have built two GPSDO's from scratch. Both worked very well against each other measured with an HP 5370B; against my rubidium; as well as my cesium. Just look at it at the 'building-block' level. (no real need for an embedded computer unless you like code more so than dips. :-) 1. Get a good, used, GPS receiver with a 10Khz output. 2. Get a good, used, 10MHz OCXO with a voltage control. 3. Design a simple divide-by-thousand divider. 4. Exclusive-or these two using a 4046 PLL (comparator 1) 5. Design a voltage tracking / filter to match the OCXO control requirements. 6. And, ...ta-dah; 7. You have a 10MHz, bench frequency standard that will rival all others; and the best part....you designed and built it! 8. NOTE: Take the unused, SR flip-flop output of the 4046 PLL and connect a small, analog, milliampmeter. It will swing back and forth trackin the XOR function until your GPSDO 'locks'; then become stationary. Basic? Yes! Over-simplified? Probably. But it will work and you will feel like you accomplished your goal of 'doing-it-yourself'. -Don ====================================================== > -- dlewis6767 <dlewis6...@austin.rr.com> _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.