Don't do it, it may drag you deep into nut territory... All i wanted was a clock based on a cheap LPro rubidium. Next thing i knew were strange things piling up on my desk. Now theres a custom power supply, 7 AVRs on a couple of boards, an FPGA running a 1GHz counter, a lump of metal and some rather nice blinkenlights.
Does anybody else have an atomic clock with ir remote control, a gregorian calendar (1582-29999), full leap year support, all official holydays incl. easter date calculation, alarm mode with snooze and 4 bit snooze period counter that is shifted out in a kind of frequency modulation, a temp controlled fan for the LPro, external c-field adjustment via d/a converter, pc interface and software for logging, time setting and main avr memory dumps, it even knows (quite acurately) how many ns its off the gps 1pps. Did i mention the alarm can be set to only ring on days i have to work? And it ain't even finished yet. You see? Don't do it, don't even think about starting. Go buy a trimble thunderbolt, it will save you LOTS of time! http://www.dulli.org/pics/20100502%20-%20Clock.jpg -------- Original-Nachricht -------- > Datum: Sat, 01 May 2010 14:28:04 -0500 > Von: "[email protected]" <[email protected]> > An: [email protected] > Betreff: [time-nuts] oscillator choice question > > I'd like to build a GPS disciplined frequency standard. > > I am slowly gathering up pieces. > > I have a Trimble Resolution T GPS card that appears to work, > and an antenna for it. > > I'm thinking now of the oscillator part. > > I have two Racal 1992 counters with the stable oscillator option > (probably 04E since these are former military units). I also have an > old Schomandl ND-100M Frequenzdecade signal source with an (I assume) > ovenized oscillator w/unknown properties. > > I'm wondering if I could use an oscillator from one of these > gizmos instead of shelling out real money on ebay? Speaking of > which, it seems like half the people in China are selling oscillators. > I assume some of them are good for this application and some not > so good? The usual suspects from HP and Agilent are there, and > they seem to command a pretty good (high) price. Which is why > I'm eyeing the Schomandl. > > Chris > w0ep > > > > > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. -- "Feel free" - 10 GB Mailbox, 100 FreeSMS/Monat ... Jetzt GMX TopMail testen: http://www.gmx.net/de/go/topmail _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
