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

[Daun Yeagley]

Hi Chuck

That's certainly a possibility that your Prologix has a problem. 
The comments on the HP-85, etc. parallel mine.  I worked for HP starting back in
1979, as an "HPIB Specialist".  My first experience was with the 9825 ("HPL"),
and when the HP-85 came out, it became the workhorse, although the 9835 and 9845
were fancier and certainly faster. My favorite though was the 200 and 300 series
with the *real* RMB (Rocky Mountain Basic, nicknamed so because it was developed
in  the Fort Collins Desktop Computer Division (DCD). I still have one or two,
and has always been my favorite for doing instrument I/O.  Now I do a lot of it
using the Microsoft stuff... VB, and more recently C#.  Life for I/O was
certainly a lot simpler and foolproof in the RMB days.  Now, it makes me attempt
to go bald!

Daun
 

-----Original Message-----
From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On Behalf
Of Chuck Harris
Sent: Wednesday, November 28, 2007 10:41 PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] OT: Prologix GPIB and HP3478A...The Plot thickens!!

Hi Duan,

I was thinking that way until I moved on to try
another instrument, my Tektronix 7854, only to find
that the Prologix can't address it either!  The Prologix
doesn't hang like it did on the 3478A, but the Tektronix
acts as if it isn't on the bus at all.

I know we have some communication going on because if
I force SRQ on the tektronix, and issue a ++srq command
to the Prologix, the Prologix returns "1" showing
the SRQ line is asserted.  But if I do a ++spoll 10
the 7854's address) the SRQ line is not reset.

As an experiment, I put my 3437A on the bus to act as
surrogate pull up resistors; the 3437A works, but the
7854 is still deaf to the Prologix's charms.

It comes as no surprise to me, however, that when I drive
the 7854 with my HP85B, the 7854 works just fine.

[Everything works with the HP85B.,, Over the nearly 20 years
  that I have used an HP85B, I have never found an instrument
  that it couldn't make play straight out of the box.]

This is beginning to look more and more like I have a
bad Prologix adapter.

Oh Abdul??

-Chuck Harris

Daun Yeagley wrote:
> Well, I have a 3478A, but unfortunately not a Prologix. If I get my hands on
one
> I could add a data point.
> Personally, I think there is a fault in that particular 3478's driver chips.
> 
> Daun 

_______________________________________________
time-nuts mailing list -- time-nuts at febo.com
To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.