Hi John,
> I have run mine with at least a half-dozen daisy-chained instruments on > 20-30 feet of cabling with no problem at all. Some of the 8650-series > signal generators cause loading problems when they're powered off, but > that's true with the NI boards as well. With the loading limits on most small microprocessors, this seems reasonable. And I am glad to hear that it is possible. It extends the use of the Prologix from one adapter/one box model, to being able to run something like an 8505A network analyzer where there are 3 or 4 boxes all on the bus. I waited for version 5.00, with its multi address capability, because I had envisioned using it one day to add automation to my 8505A system. >> I would be angry, except that I already knew that the design had a major >> short cut in it before I bought my Prologix. If you recall, I addressed >> that issue many months back on this forum. > > If you want 'anger', try spending time supporting other boards, especially > the off-brands that claim to be NI488.2-compatible. Anger is only the > second or third stage of the grief that process brings. Abdul has been great with his support. I have no complaints. I would have some, if I didn't jump into this deal already knowing pretty well the potential caveats of the design. A given instrument's support of the IEEE-488 standard is a little different from a competitor's support of NI's house brand standard. Kind of like trying to be a windows compatible operating system when microsoft only wants you to buy its operating system. > And GPIB itself is not exactly a textbook example of how to design a > multiuser bus. Certainly not. But how many use it that way? It is generally used as a single controller with multiple talker/listeners, working sequentially when addressed by the controller. > >> I bought my Prologix controller based on the good reports that all of >> you guys posted. And the need to control a single device, a Tektronix >> 7854. It will do that, so I am satisfied. >> >> The "Go away kid, you bother me!" approach won't win over many >> customers. > > I'm sorry; who said that? It was the tone of your suggestion that everyone that buys a unit and finds out that it doesn't work on such-and-such an instrument should be given his money back, and sent away. I am all in favor of a product that has known design constraints that keep its price low. I bought this adapter knowing that was true. It would be nice, though, to have the option of having the same design available with true 488 drivers. I think that capability would smoke out a few more customers at very little extra cost. > I need to clarify that I've helped Abdul with some testing now and again, > but have absolutely no other business relationship with him, other than the > fact that I happen to live in the same area, and regularly let him (and > pretty much anyone else who asks) drop by to use my test gear. That is what I believed to be true. You have said nothing to imply any other relationship. -Chuck Harris _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.