[time-nuts] Prologix GPIB-USB hint

John Miles jmiles at pop.net
Sat Jun 9 16:10:11 EDT 2007

I assume you just mean ++auto 0 followed by ++read, right?  There's no
++aread command in the 4.4 firmware.

-- john, KE5FX

> -----Original Message-----
> From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com]On
> Behalf Of Jack Hudler
> Sent: Saturday, June 09, 2007 12:46 PM
> To: 'Discussion of precise time and frequency measurement'
> Subject: Re: [time-nuts] Prologix GPIB-USB hint
> ++aread ... this issue (multiple devices talking) is what kept me from
> trying USB/GPIB.
> 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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