[time-nuts] Prologix GPIB-NET, HP 5370A, HP5334A problem?

[Gerry Glauser]

Bill,
I recall there was some question on the Prologix "unlisten", but I suspect
you're seeing a 5334A issue. While testing my driver at max 5334A
throughput, I found found you cannot trust a ++read until the status byte
returns data ready, else you may get the previous reading. That would happen
even at reduced throughput, depending on gate time. So I send a trigger,
then loop on status byte (with timeout of gate time+), then read. Because
that is necessary, I didn't see any advantage to the WA1 mode.
Gerry

>wje <wje at quackers.net>
>With the 5334A, I can get samples for as long as I want, no problem. 
>However, if I set the 5334A to 'WA1' mode, which is supposed to wait 
>until the counter is addressed before taking each sample, what happens 
>is that I can read one value. Every successive read returns the same 
>value; the 5334A never triggers for a new sample. Either I don't 
>understand the behavior of WA1, although HP's sample program indicates 
>that what I've described is proper, or there is some incompatibility 
>between the Prologix and the 5334A.