Xav

Hi, I'd like to do some PPS comparisons on an SBC (like a Beaglebone or RPi) using a TDC. So far the ones I've seen which could be suitable are ACAM's TDC-GPX and TI's THS788: http://www.acam.de/fileadmin/Download/pdf/English/DB_GPX_e.pdf http://www.ti.com/lit/ds/symlink/ths788.pdf However these chips don't look so simple to connect to a standard SBC. Would anyone of you already have attempted that journey, or simply have a reasonably good idea about how to do that ? Thanks, Xav

 Xav

What about the PICTIC? <http://www.ko4bb.com/dokuwiki/doku.php?id=precision_timing:pictic> On Tue, Sep 15, 2015 at 4:30 PM, Xavier Bestel <xavier.bestel@free.fr> wrote: > Hi, > > I'd like to do some PPS comparisons on an SBC (like a Beaglebone or RPi) > using a TDC. So far the ones I've seen which could be suitable are ACAM's > TDC-GPX and TI's THS788: > http://www.acam.de/fileadmin/Download/pdf/English/DB_GPX_e.pdf > http://www.ti.com/lit/ds/symlink/ths788.pdf > > However these chips don't look so simple to connect to a standard SBC. Would > anyone of you already have attempted that journey, or simply have a > reasonably good idea about how to do that ? > > Thanks, > > Xav > _______________________________________________ > 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.

		Attila Kinali

On Tue, 15 Sep 2015 16:30:59 +0200 Xavier Bestel <xavier.bestel@free.fr> wrote: > I'd like to do some PPS comparisons on an SBC (like a Beaglebone or RPi) > using a TDC. So far the ones I've seen which could be suitable are > ACAM's TDC-GPX and TI's THS788: > http://www.acam.de/fileadmin/Download/pdf/English/DB_GPX_e.pdf > http://www.ti.com/lit/ds/symlink/ths788.pdf > However these chips don't look so simple to connect to a standard SBC. > Would anyone of you already have attempted that journey, or simply have > a reasonably good idea about how to do that ? Why don't they connect easily to SBCs? (beside, is there such a thing as a standard SBC?) Yes, they both use differential inputs (for obvious reasons) but this easy to solve with a single gate. Alternatively you can try the PICTIC-II [1] which you can extend to do more than just timestamping and to multiple ports. For this application it should be precise/accurate enough. Attila Kinali [1] http://www.ko4bb.com/dokuwiki/doku.php?id=precision_timing:pictic -- It is upon moral qualities that a society is ultimately founded. All the prosperity and technological sophistication in the world is of no use without that foundation. -- Miss Matheson, The Diamond Age, Neil Stephenson

 Xav

There's some useful information in the following long threads: acam TDC chips (was: PicTic Data) https://www.febo.com/pipermail/time-nuts/2010-August/049463.html Some info on the ACAM TDC and a question to Brooks Shera's PI controller https://www.febo.com/pipermail/time-nuts/2010-October/051134.html Acam TDC's https://www.febo.com/pipermail/time-nuts/2014-April/084070.html Experience with THS788 from TI? https://www.febo.com/pipermail/time-nuts/2012-March/065293.html /tvb ----- Original Message ----- From: "Xavier Bestel" <xavier.bestel@free.fr> To: <time-nuts@febo.com> Sent: Tuesday, September 15, 2015 7:30 AM Subject: [time-nuts] Easy-to-use TDC to compare PPS > Hi, > > I'd like to do some PPS comparisons on an SBC (like a Beaglebone or RPi) > using a TDC. So far the ones I've seen which could be suitable are > ACAM's TDC-GPX and TI's THS788: > http://www.acam.de/fileadmin/Download/pdf/English/DB_GPX_e.pdf > http://www.ti.com/lit/ds/symlink/ths788.pdf > > However these chips don't look so simple to connect to a standard SBC. > Would anyone of you already have attempted that journey, or simply have > a reasonably good idea about how to do that ? > > Thanks, > > Xav > _______________________________________________ > 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.

 Xav

I don't recall ever hearing from Deutschland about this chip. Gave up, if I remember aright. Still engaged in the mad race to update, 5 yr later. Got a 620, and the BBblsck boards for the 5370's Don Tom Van Baak > There's some useful information in the following long threads: > > acam TDC chips (was: PicTic Data) > https://www.febo.com/pipermail/time-nuts/2010-August/049463.html > > Some info on the ACAM TDC and a question to Brooks Shera's PI controller > https://www.febo.com/pipermail/time-nuts/2010-October/051134.html > > Acam TDC's > https://www.febo.com/pipermail/time-nuts/2014-April/084070.html > > Experience with THS788 from TI? > https://www.febo.com/pipermail/time-nuts/2012-March/065293.html > > /tvb > > > ----- Original Message ----- > From: "Xavier Bestel" <xavier.bestel@free.fr> > To: <time-nuts@febo.com> > Sent: Tuesday, September 15, 2015 7:30 AM > Subject: [time-nuts] Easy-to-use TDC to compare PPS > > >> Hi, >> >> I'd like to do some PPS comparisons on an SBC (like a Beaglebone or RPi) >> using a TDC. So far the ones I've seen which could be suitable are >> ACAM's TDC-GPX and TI's THS788: >> http://www.acam.de/fileadmin/Download/pdf/English/DB_GPX_e.pdf >> http://www.ti.com/lit/ds/symlink/ths788.pdf >> >> However these chips don't look so simple to connect to a standard SBC. >> Would anyone of you already have attempted that journey, or simply have >> a reasonably good idea about how to do that ? >> >> Thanks, >> >> Xav >> _______________________________________________ >> 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. > > -- Felix qui potuit rerum cognoscere causas. Lucky is he who has been able to understand the causes of things. Virgil ------------------------------- "Noli sinere nothos te opprimere" Dr. Don Latham, AJ7LL Six Mile Systems LLC, 17850 Six Mile Road Huson, MT, 59846 mailing address: POBox 404 Frenchtown MT 59834-0404 VOX 406-626-4304 CEL 406-241-5093 Skype: buffler2 www.lightningforensics.com www.sixmilesystems.com

Xav

 Xav

Hi guys, sorry for the delay (!), thanks for your suggestions. I didn't know about the PICTIC, it looks good - and cheaper than the other options. I've not made up my mind yet, and now thanks to you I have 3 choices instead of 2. Good job guys. I'll keep you informed if I manage to do something of my liking. Xav Le mardi 15 septembre 2015 à 12:56 -0600, Don Latham a écrit : > I don't recall ever hearing from Deutschland about this chip. Gave up, if I > remember aright. Still engaged in the mad race to update, 5 yr later. Got a > 620, and the BBblsck boards for the 5370's > Don > > Tom Van Baak > > There's some useful information in the following long threads: > > > > acam TDC chips (was: PicTic Data) > > https://www.febo.com/pipermail/time-nuts/2010-August/049463.html > > > > Some info on the ACAM TDC and a question to Brooks Shera's PI controller > > https://www.febo.com/pipermail/time-nuts/2010-October/051134.html > > > > Acam TDC's > > https://www.febo.com/pipermail/time-nuts/2014-April/084070.html > > > > Experience with THS788 from TI? > > https://www.febo.com/pipermail/time-nuts/2012-March/065293.html > > > > /tvb > > > > > > ----- Original Message ----- > > From: "Xavier Bestel" <xavier.bestel@free.fr> > > To: <time-nuts@febo.com> > > Sent: Tuesday, September 15, 2015 7:30 AM > > Subject: [time-nuts] Easy-to-use TDC to compare PPS > > > > > > > Hi, > > > > > > I'd like to do some PPS comparisons on an SBC (like a Beaglebone or RPi) > > > using a TDC. So far the ones I've seen which could be suitable are > > > ACAM's TDC-GPX and TI's THS788: > > > http://www.acam.de/fileadmin/Download/pdf/English/DB_GPX_e.pdf > > > http://www.ti.com/lit/ds/symlink/ths788.pdf > > > > > > However these chips don't look so simple to connect to a standard SBC. > > > Would anyone of you already have attempted that journey, or simply have > > > a reasonably good idea about how to do that ? > > > > > > Thanks, > > > > > > Xav > > > _______________________________________________ > > > 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. > > > > > >