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

[Didier Juges]

Chuck,

Most replies to your questions came before I read this :-)

The last tests I reported on yesterday were done with only the 3478 on the
bus. I'll be glad to check the waveform with a scope if that can help.

Didier KO4BB 

> -----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 12:45 PM
> To: Discussion of precise time and frequency measurement
> Subject: Re: [time-nuts] OT: Prologix GPIB and HP3478A...The Answer!
> 
> Hi Abdul,
> 
> Bear in mind that it isn't proved that my HP3478A is working 
> flawlessly.
> 
> It is possible that it has a flaw in its 488 drivers that 
> prevents them from ever putting pull ups on the bus.  This 
> wouldn't be noticed with a controller that fully met the 488 
> standard, such as the one in the HP85B, or on a 488 bus that 
> had more than one instrument.
> 
> You may still be safe with your cost saving decision.  Didier 
> Juges says his 3478A works just fine with his Prologix 
> controller.  So we need to ask him if he has ever 
> successfully used his Prologix controller with only the 
> HP3478A on the bus... and what is the build number of his 3478A.
> 
> Mine is: 2911A523XX.
> 
> -Chuck Harris