Hi Jim I'm wondering that if we were to find an example of a known "good" unit as well as a bad one, that we could look at the EPROMS to determine any defenses and then clone the good ones. That would be one way to save David if he gets a "bad" one.
Daun -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of [EMAIL PROTECTED] Sent: Tuesday, April 26, 2005 12:18 PM To: [email protected] Subject: RE: [time-nuts] Difference between HP 5370A and 5370B Hi David, Apparently the GPIB fix occurred in the 5370B models only and as far as he knows, there could be some units out there with "bad" firmware in them and some with the GPIB fix. The problem still remains where they didn't change the firmware revision number so there's no way to confirm it one way or the other, besides having your GPIB hang up on you. Sorry, but that's about the best that can be done on this issue. I hope your 5370B is a later model that has the fix in it! Regards, Jim > >>-----Original Message----- >>From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] >>Behalf Of David Kirkby >>Sent: Friday, April 15, 2005 1:52 PM >>To: Discussion of precise time and frequency measurement >>Subject: Re: [time-nuts] Difference between HP 5370A and 5370B >> >> >>[EMAIL PROTECTED] wrote: >>> Hi again David, >>> >>> I talked to xxxxx this morning and here's what >>> he said: >> >>Thanks. >> >>> The 5370B has a different processor board than the >>> "A" model, with on-board RAM (the "A" had a separate >>> RAM board). The "B" has had an upgrade to its DAC >>> board. The "B" has a different input module that is >>> more stable than in the "A". The firmware has had an >>> upgrade in the "B", as the HPIB (GPIB) would occasionally >>> hang up in the "A" model. The bad news is that the >>> newer firmware carries the same rev. number as the old one >>> so you can't easily tell which one you have installed. >> >>I'm slightly lost there. You seem to be implying the B's have newer >>firmware than the A's, but then saying its not easy to tell if >>you have >>the new firmware, since the revision is the same. If the newer >>firmware >>was installed only in B's, then all you would need to do is >>look at the >>model number. Clearly then I assume either some B's have the old >>firmware, or some A's have the new firmware, or perhaps HP >>would update >>an A to a B firmware. >> > >_______________________________________________ >time-nuts mailing list >[email protected] >https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > _______________________________________________ time-nuts mailing list [email protected] https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts _______________________________________________ time-nuts mailing list [email protected] https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
