Check http://www.ko4bb.com/Test_Equipment/GPIB.php
Didier KO4BB ------------------------ Sent from my BlackBerry Wireless thingy while I do other things... -----Original Message----- From: Mark Spencer <mspencer12...@yahoo.ca> Sender: time-nuts-boun...@febo.com Date: Sat, 24 Jul 2010 18:15:20 To: <time-nuts@febo.com>; <j...@quik.com> Reply-To: Discussion of precise time and frequency measurement <time-nuts@febo.com> Subject: Re: [time-nuts] Basic question regarding comparing two frequencies Thanks for the insight re the GPIB interface. I'm curious if any has any insight as to a suitable usb or pci to GPIB interface module or card ? It sounds as though other surplus test gear is likely to have a GPIB interface. Regards Mark Spencer On Sat Jul 24th, 2010 6:40 PM EDT J. L. Trantham wrote: >I would agree. GPIB (aka HPIB) is ubiquitous and is a great place to start. >Unfortunately, I haven't gotten that up to the top of my 'to-do' list yet. >I have a computer, HP and National interface cards, cables, but no time to >find the software to make everything communicate yet. I think it has a lot >to do with the fact that I have relatively old HP equipment that is >relatively 'tongue-tied' but I think I will be able to figure it out once I >get the time. > >Certainly the right place to start though, IMO. > >Joe > >-----Original Message----- >From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On >Behalf Of J. Forster >Sent: Saturday, July 24, 2010 5:24 PM >To: Discussion of precise time and frequency measurement >Subject: Re: [time-nuts] Basic question regarding comparing two frequencies > >".. more generic interface." ?? > >The vast majority of professional test equipment has GPIB. Virtually >anything else is an "also ran". > >FWIW, > >-John > >============ > > >> Thanks, I'm glad to hear I am on the right track. At some point it would >> be >> nice to obtain a counter that can measure the drift of the time base in >> the >> 5328A. The 5328A has a GPIB interface but as the display only varies by a >> few >> counts I'm not inclined to track down a GPIB adapter just to plot this.) >> Hopefully a newer counter would have a more generic interface. >> >> Best regards >> Mark Spencer >> >> >> ----- Original Message ---- >> From: J. L. Trantham <jlt...@att.net> >> To: Discussion of precise time and frequency measurement >> <time-nuts@febo.com> >> Sent: Sat, July 24, 2010 1:49:51 PM >> Subject: Re: [time-nuts] Basic question regarding comparing two >> frequencies >> >> Sounds about right. One cycle per 5 seconds or about 0.2 Hz difference. >> Therefore, 9,999,999.8 Hz. >> >> I would feed the GPSDO to trigger your scope and look at the output of the >> time base on one channel of the scope. You could also look at the GPSDO >> on >> the other channel. Then you could adjust your counter time base to >> 'freeze' >> the display. Probably good to 'align' the counter time base but for long >> term comparison, probably better to use a counter and plot the difference. >> >> Joe >> >> -----Original Message----- >> From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On >> Behalf Of Mark Spencer >> Sent: Saturday, July 24, 2010 12:29 PM >> To: time-nuts@febo.com >> Subject: [time-nuts] Basic question regarding comparing two frequencies >> >> Hello: >> >> Just for grins I decided to compare the frquency from my GPSDO to the time >> base >> in my 5328A counter. >> >> >> I connected the 10 mhz time base from the counter to channel A of my 100 >> Mhz >> >> scope, fed the 10 mhz signal from my GPSDO into Channel B and with a T >> adaptor >> also fed this signal into the input of the counter. I scope to trigger >> from >> Channel B. >> >> >> The drift betwen the two signals on the scope seems to match the error in >> the >> displayed frquency on the counter. (ie. if the counter shows 9999.9998 it >> takes >> approx 5 seconds for the the wave form on channel A to slip a full cycle >> realitve to channel B.) >> >> >> Is this a reasonable approach or is there a better way to compare two >> frequencies using a scope ? >> >> Best regards >> Mark Spencer >> >> >> >>_______________________________________________ >> 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. >> >> > > > >_______________________________________________ >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. _______________________________________________ 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.