[EMAIL PROTECTED] wrote:
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.
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-- Dr. David Kirkby PhD CEng MIEE, Senior Research Fellow, Department of Medical Physics, Mallet Place Engineering Building, Gower St, University College London, London WC1E 6BT.
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