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Propeller Head Plaza Technical and scientific discussion of amps, cables and other topics. |
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Propeller Head Plaza Technical and scientific discussion of amps, cables and other topics. |
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In Reply to: I'll go look for the posts, but am I wrong? posted by Commuteman on September 3, 2003 at 21:42:04:
""In fact, I think you even claimed that HP engineers you talked to had no idea how he did it.""peterWhat they actually stated was they don't know how he can simply assume that the actual spectra viewed that far down was in fact what was there, as the equipment used was not designed for that application (application being nanovolt signal looking).
They tend to use LN2 for that really hairy stuff, and can spend a lifetime verifying that what they see down there is in fact reality. It's called characterization of the equipment capabilities.
""But first: My reaction to the earlier post was more in response to the suggestion that Steve Eddy might have ever attempted to engage in a sensible technical debate with anyone.....""peter
Ah, but my name was dragged in as also slamming JC's everything.
My premise all along has been that the repeatability of the measurement shows that something cable specific is going on..But, my approach is to view everything in the chain to make sure that what is seen is actually what is there.
To do so requires examining everything..the equipment is no exception.
You will, without exception, find throughout the archives, that for pleasant posts and responses, I always respond in kind. You will also find that I am not shy about responding in kind to posts where I am told I don't know what I'm doing, all I am doing is nitpiking, I should enter the real world of physics, etc., etc.
You will also find that I bend over backwards giving the benefit of the doubt..Case in point: the recent post where JC asked you to let him know if you find any peltier or seebeck effects. I then posted that I really did not know how it would present, with a little embellishment..To which I got "bullshit". Needless to say, my assumption that there was an interest in discovery was incorrect, and it was just a jab..
You will also find (I believe) that I do not bow to credentials. I work with some nuts who have degrees out the wazoo, and I've learned very good soldering techniques from non english speaking hispanic line workers, who I would match assembly capabilities against any technician alive. So to state that I will question input validity based on credentials is to beg comment by me.
You can stop looking if you wish..I withdraw the request..If you choose to continue looking to find where I behaved in the fashion you have stated, that is also fine..I would like to know.
""were completely clueless about the simple fact that the test JC described involved averaging over a large number of samples, which reduces the noise floor considerably""peter
That most certainly would not have been me. We perform many measurements requiring averaging to drop the ambient noise. In fact, one of my co-workers writes all his own FFT algorithms because he has found over the last 20 years that the commercial stuff is not good enough for his applications..he still scares me..
""I try to stick to areas in which I know what I'm talking about. I also try to engage in real discussion (such as our Peltier effects thread...)""peter
I also try to follow that..but, both of us are certainly fringing our knowledge in that thread..IMO, that's the most fun..
Cheers, John
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Follow Ups
- Re: I'll go look for the posts, but am I wrong? - jneutron 07:10:52 09/04/03 (0)
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