[time-nuts] Prologix GPIB-USB hint

[Jack Hudler]

++aread ... this issue (multiple devices talking) is what kept me from
trying USB/GPIB.

-----Original Message-----
From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
Behalf Of GerryG
Sent: Saturday, June 09, 2007 12:10 PM
To: time-nuts at febo.com
Subject: [time-nuts] Prologix GPIB-USB hint

A previous post had,
>Some GPIB instruments will complain if addressed to talk when they have not
>been asked about anything.  The HP6626A Power Supply is my present instance

I've got a half-dozen devices on the bus, and the behavior of ++auto 1 was
an issue. While it's convenient for continous readings from a single device,
it causes mass confusion with many. His new ++aread solves that issue. Just
remember to adjust the timeout to suit the device and measurement. With this
I can trigger multiple devices, then later go and collect the results.

Just completed testing Abdul's latest, and all the basic functionality looks
good, including SRQ and serial polls. He's been great to work with, upgrades
are very easy to apply, and progress has been good.

>From much past experience, bear in mind there will still be some glitches
from a few odd devices, but that's the nature of the beast (especially HP
reciprocal counters). Now moving on to high-speed data transfer from
multiple devices, so I'll see how well things hold up.

I'd be interested in hearing about any GPIB/Prologix issues or questions
that I may be able to help with.

Gerry K7ATS

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