Daun -- Guess who you see frequently who has a Prologix you might able to borrow...
John ---- Daun Yeagley said the following on 11/28/2007 08:45 PM: > Well, I have a 3478A, but unfortunately not a Prologix. If I get my hands on > one > I could add a data point. > Personally, I think there is a fault in that particular 3478's driver chips. > > Daun > > -----Original Message----- > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf > Of Chuck Harris > Sent: Wednesday, November 28, 2007 8:06 PM > To: Discussion of precise time and frequency measurement > Subject: Re: [time-nuts] OT: Prologix GPIB and HP3478A...The Answer! > > Didier Juges wrote: > >> I would like to make sure we find out where the problem is. I agree with >> John that the Prologix has proven to be dependable and that the design >> approach was a reasonable compromise. Measurement Computing sells a GPIB >> driver chip that is in a small surface mount package, but it costs more than >> the Atmel chip Abdul is using, and it's just a driver. >> >> Didier > > Making changes for the sake of making changes is probably a folly. > The Prologix concept is sound the way it is, but it should have some > mention of the known limitations. > > It would be nice if we could find a couple of other folks that > have 3478's to test with the Prologix unit. > > Because the 3478 uses 75ALS160/161's, it could have the tristate/pullup > modes selected by the microprocessor. So it could be a part failure, > or a firmware problem. > > I will try and determine which is true, but it will have to wait for > a while. > > Thanks to all for their help and input into my problem > > -Chuck Harris > > _______________________________________________ > 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. > > _______________________________________________ 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.
