John, I appreciate your help. Among other things, I'm not sure what to do with the adjustment pots after I finish building the board.
Speaking of software, I was wondering if anyone had written a program for controlling the PICTIC II and logging the data. Using a serial terminal can be tedious. Joe Gray W5JG On Sun, Feb 5, 2012 at 11:12 AM, John Miles <[email protected]> wrote: >> I know it has been a while since the boards were sent out, but I >> finally placed an order with Mouser to populate the two boards I >> bought. I already have the "unobtainium" chips and can program the >> PICs, so no problems there. >> >> The question is, how do I use the PICTIC II after I've assembled it? I >> have read the information on the KO4BB WIKI and downloaded the files, >> but what I really need is an explanation of how to adjust the circuit >> after assembly and then a simple example of its use. Comparing a >> FE-5680A with a HP Z3801A would be a good example, since I have those >> :-) >> >> I've lurked on this list for quite some time, but I'm still a newbie, >> compared to most here. >> >> Joe Gray >> W5JG > > Let me see if I can set up a demo/example use case later on today. I was > getting good results in 1pps-triggered 10 MHz measurements a couple of years > ago, but my software platform was then rewritten for other reasons and I > haven't gotten the PICTIC running with the new code yet. > > Unfortunately it won't have the stability to measure a rubidium standard > very effectively, at least at timescales shorter than a few hours. The > PICTIC II's residual ADEV crosses into the E-13s at around 1000 seconds, > while a small Rb clock in good working order will get there at about t=80 > seconds. If sufficiently ambitious, you could fix that problem with W. R. > Riley's "Small DMTD" system, which used a PICTIC as the back end > (http://www.wriley.com/A%20Small%20DMTD%20System.pdf ). > > -- john, KE5FX > > > > _______________________________________________ > 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. > _______________________________________________ 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.
