Stanley and Nigel, I have received the go ahead to distribute the Small DMTD project files from Bill. It is in the form of a 500k zip so how do we want to play this? For a start, Gmail will not let me send .exe files, even though they are inside a zip file and I'm not putting them into a password encrypted file to circumvent this so I'll send the archive with the extension changed to .xxx. If you don't know how to change that back to .zip may I suggest you contact Mr Gates and tell him that his method of file typing sucks and is a noddy system fit only for Toytown.
Steve ---------- Forwarded message ---------- From: William Riley <wjri...@embarqmail.com> Date: 16 August 2010 02:32 Subject: Re: Fwd: [time-nuts] PicTic Data To: Steve Rooke <sar10...@gmail.com> Steve: You are welcome to freely distribute the Small DMTD files. Best regards, Bill W.J. Riley Hamilton Technical Services 650 Distant Island Drive Beaufort, SC 29907-1580 USA Phone: 843-525-6495 Fax: 843-525-0251 E-Mail: b...@wriley.com Web: www.wriley.com -------------------------------------------------- From: "Steve Rooke" <sar10...@gmail.com> Sent: Sunday, August 15, 2010 8:39 AM To: <b...@wriley.com> Subject: Fwd: [time-nuts] PicTic Data > Hello Bill, > > I have not started on the DMTD project yet as I'm still in the process > of building Richard's PICTIC II boards but Stanley Reynolds posted > about your DMTD expressing a desire to build them. As I have all the > info needed for this, I would be in a position to supply him and > anyone else with this data BUT this depends upon your willingness for > the distribution of your design to go beyond myself. If you are happy > for me to do this, I will, otherwise, i will refrain from doing this? > > Best regards, > Steve > > ---------- Forwarded message ---------- > From: Steve Rooke <sar10...@gmail.com> > Date: 16 August 2010 00:05 > Subject: Re: [time-nuts] PicTic Data > To: Discussion of precise time and frequency measurement <time-nuts@febo.com> > > > On 15 August 2010 17:01, Stanley Reynolds <stanley_reyno...@yahoo.com> wrote: >> >> Thanks for looking at my data that was what I was fishing for all along :-) >> >> I was looking at the article: >> >> "A Small Dual Mixer Time Difference (DMTD) Clock Measuring System W.J. Riley >> " >> Richard posted >> >> And thinking it would be nice to do the DSS and Mixer boards to go with the >> pictic II. > > I have been speaking to Bill Riley about doing this myself and he has > sent me all the board designs, software, etc. to enable one to be > built. I can ask him if he is OK if I distribute this if you wish. > > Steve > >> Or changing the Pictic II to use the Acam TDC GP2 Time to Digital Converter; >> 2 >> channel w/65 ps resolution now under $30. as Bruce suggested a while back. >> >> My wants sure exceed my cans ;-) >> >> Stanley >> >> >> >> ----- Original Message ---- >> From: John Miles <jmi...@pop.net> >> To: Discussion of precise time and frequency measurement <time-nuts@febo.com> >> Sent: Sat, August 14, 2010 11:25:44 PM >> Subject: Re: [time-nuts] PicTic Data >> >> >>> John glad you are getting good results and have something to >>> compare to. Back to >>> me who doesn't have any knowns but lots of guessing. Attached is >>> a run with a >>> box cover over the pictic, run is shorter ~ 800 seconds but the >>> box does look >>> like it helps. >>> I need to do a lot more testing but sometimes I just get excited :-) >> >> I imported your .txt file alongside the traces I captured. Assuming it was >> taken with 1 Hz on both START and STOP, it looks like the attached. >> >> You're getting the exact sort of results that I see if I feed both the START >> and STOP inputs at 1 Hz. My guess is that the onboard oscillator limits the >> performance in that case, since it has a lot of time to drift during the >> measurement if the two pulses occur close to 1 second apart. Even the 5370B >> looks much worse if driven with 1 Hz on both inputs than it does with 1 Hz >> at START and 10 MHz at STOP. >> >> So I think you're basically up and running OK. When I get around to trying >> a better clock, I'll also go back and see if the 1-pps x2 performance >> improves. >> >> It would be great if the next spin of the board could include sine-to-CMOS >> shapers for the input channels as well as an external clock input, for >> people who are working directly with RF signals as opposed to 1-pps. >> >> -- john, KE5FX >> >> >>> ----- Original Message ---- >>> From: John Miles <jmi...@pop.net> >>> To: Discussion of precise time and frequency measurement >>> <time-nuts@febo.com> >>> Sent: Sat, August 14, 2010 10:19:46 PM >>> Subject: Re: [time-nuts] PicTic Data >>> >>> A few preliminary measurements here (I'm working on getting some software >>> support together): >>> http://www.ke5fx.com/pictic.htm >>> >>> -- john, KE5FX >>> >>> > -----Original Message----- >>> > From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com]on >>> > Behalf Of Stanley Reynolds >>> > Sent: Saturday, August 14, 2010 7:12 PM >>> > To: Discussion of precise time and frequency measurement >>> > Subject: Re: [time-nuts] PicTic Data >>> > >>> > >>> > >>> > >>> > My guess as to what the data may indicate is performance of the >>> > 10 Mhz 20PPM >>> > PICTIC internal oscillator, need to repeat test with precision >>> > 10Mhz and auto >>> > calibrate off. Fatness of the line/width maybe PICTIC error. Note >>> > graph seems to >>> > show me leaving the room and returning via the outside door. Not >>> > sure what the >>> > ~100 sec oscillations are, need to check a/c cycle time. >>> > >>> > Stanley >>> > >>> > _______________________________________________ >>> > 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. >>> > >>> >>> >>> _______________________________________________ >>> 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. >> >> _______________________________________________ >> 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. >> > > > > -- > Steve Rooke - ZL3TUV & G8KVD > The only reason for time is so that everything doesn't happen at once. > - Einstein > > > > -- > Steve Rooke - ZL3TUV & G8KVD > The only reason for time is so that everything doesn't happen at once. > - Einstein > > No virus found in this incoming message. > Checked by AVG - www.avg.com > Version: 9.0.851 / Virus Database: 271.1.1/3071 - Release Date: 08/14/10 > 04:48:00 > -- Steve Rooke - ZL3TUV & G8KVD The only reason for time is so that everything doesn't happen at once. - Einstein _______________________________________________ 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.