[time-nuts] EZGPIB and Racal-Dana 1992 Counter

[Ulrich Bangert]

Ed,

to my own pleasure this problem has been solved completely! 

As it turned out the situation is: No matter what EOS settings you may
otherwise have made using the ibConfig function or the ibEOS function,
the GPIB32.DLL's "receive" function (that i use for reasons beyond this
discussion) will need to be told explicitely to use EITHER the EOI line
OR (exclusive or!) a certain EOS char.

I set the default now to using a EOS char of 0x0A (line feed) and
everythings works ok. I included two new procedures to enable/disable
the use of EOS and to set the EOS char. I am sure that this will cure
your problem.

BTW: The 1992 counter is now the first instrument that I get acquainted
with that does not serve the EOI line or can be told to do so. Their
"bigger brother" 1996 can, at least mine.

The new version of EZGPIB can be downloaded from the usual place.

Best regards
Ulrich Bangert   

> -----Ursprungliche Nachricht-----
> Von: time-nuts-bounces at febo.com 
> [mailto:time-nuts-bounces at febo.com] Im Auftrag von ed
> Gesendet: Mittwoch, 18. Juni 2008 18:35
> An: time-nuts at febo.com
> Betreff: [time-nuts] EZGPIB and Racal-Dana 1992 Counter
> 
> 
> Hello everyone
> My name is Ed
> I'm a time-nut.
> My problem started simply enough, my PC wouldn't keep 
> accurate time even 
> though it was set to update via the net.  I started 
> investigating that 
> and suddenly whipped through NTP, Quartz, Rubidium, Allen variance, 1 
> PPS, and GPSDO!  I jammed on the brakes before I hit Cesium 
> or Hydrogen. 
>   I'm okay.  I can control this thing.....I think.
> 
> Today I'm looking for some help using EZGPIB and a National 
> Instruments 
> GPIB+ controller to program my Racal-Dana 1992 counter.  I can send
> commands to the counter, and read the status byte, but when I try to 
> read data I get a timeout error.  NI Spy confirms the 
> timeout, but shows 
> that there's good data in the buffer.
> 
> Ulrich (author of EZGPIB) has made some suggestions involving EOI 
> (apparently not supported on the 1992) and controller settings like 
> 'Terminate Read on EOS'.  Unfortunately nothing has helped.
> 
> So before Ulrich spends any more time and effort solving my 
> problem, I 
> thought I'd ask here.  Has anyone successfully used EZGPIB and a 
> National Instruments controller to control a Racal-Dana 1991 or 1992 
> counter?  What is the trick?
> 
> Thanks,
> Ed
> 
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