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Re: Definition of terms


 

No, it isn't "you just gotta know". Those of us who actually spend the
time and make the effort to find an engineering sound reference online
which everyone can access to answer the question(s), simply mean to help
and give you a sound answer without your invoking any number of search
engines and avoiding snake oil so prevalent on the www. Chances are we've
"been there, done that" in our training/careers. There are sources online
that put things much clearer and more succinctly than our own wording.
Chances are, we know where to look for clear and concise and engineering
sound answers which all can access and learn if they choose to pursue the
URL's.

I take the effort of helping others by emailing out sound, correct, no
snake oil references to properly answer question(s) very seriously. If you
don't want to pursue those links, I can't help you. Please don't put them
in the "you just gotta know' category.....please.....

Yes, I'm just a bit offended.

*Example:* Just this week I had to put out yet another "take" on the 101
points allocated to any set frequency span. I just hope others read it and
internalized it and are willing to pass it on to other newbies of the
NANOVNA community. Nothing but VERY SIMPLE algebra, no "higher" math!!!

Distance between points for a given frequency range = (Frequency
Range) / 101.

Of course, if you use SAVER, you can set any number of bins to
greatlyincrease this frequency resolution.

EXAMPLE: Frequency Range defined as 1 through 30 MHz.

Point spacing (resolution: = (30 MHz - 1
MHz) / 101 = 29 MHz / 101 = 0.29 MHz

If I then look specifically at 75/80
meters which spans 3.5 to 4.0 MHz, a total span of 0.5 MHz, I will have
1.74 (at best, 2) points in the whole
band. This is not too terribly useful for looking at tuning a multiband
antenna.

EVERYONE: PLEASE,......P L E A S E,.............., take the above and
pass the 101 point "gotcha" on to other new members of the NANOVNA
community. PLEASE??

Dave - W?LEV

On Fri, Jun 5, 2020 at 11:52 AM BruceN <k4tql@...> wrote:

Gary,

This is something that I have issues with, too. It reminds me of the day,
way back in the day, when I asked someone where I could find documentation
regarding the Unix operating system. This was before the Internet (over 50
years ago). The answer was "you just gotta know".

When the answers to your questions are "read this wiki" or "read that
wiki", the answer is just the same as: "you just gotta know where to
look". It would be just as easy for a response to be furnishing a link to
"where" to look. And, as in your case, maybe you looked there and missed
it. Happens to me all the time. And maybe there is a better place to look
as one responder provided.

I've run into many instance of this smug attitude of "I know and you
don't. Go find it yourself". I'll bet a lot of them wouldn't know how to
solder two wires together without burning themselves for all their
"knowledge". I knew professors of electrical engineering in college who
couldn't change their car battery. That wasn't an electrical task, it was
a mechanical task.

And, no I can't answer your questions either. If you find a good place to
find them, let me know. I need the answers, too. You might also point out
where you have looked unsuccessfully.

BruceN / K4TQL

--
*"To invent, you need a good imagination and a pile of junk"* -- Thomas
Alva Edison (1847-1931)



--
*Dave - W?LEV*
*Just Let Darwin Work*

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