[time-nuts] OT: Prologix GPIB and HP3478A...The Answer!

Chuck Harris cfharris at erols.com
Wed Nov 28 15:39:42 EST 2007

Ah yes!  You gotta love it when the test instrument fixes
the problem ;-)

I recall hearing of a few instruments that had scope probes
built in to fix strange parasitic problems...

-Chuck Harris

Poul-Henning Kamp wrote:
> In message <E1IxRdG-00038h-Eg at febo.com>, "Prologix" writes:
>> Hi Chuck,
>> Good work identifying the problem! Leaving out the bus driver chips was a
>> conscious decision based on available board space and was not made lightly.
>> Extensive testing had shown that not to be an issue, so far. In fact, yours
>> is the first reported case of a drive related problem. However, we consider
>> even one incident to be one too many, and will be revisiting the decision
>> during a future release.
> I think I can report having seen the problem as well, only not
> realizing the cause, because it worked flawlessly when I put my
> HP59401A Bus Analyser on the bus.

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