Re: errors of "error" models
I guess this is why R&S introduced the T-check many years ago as a simple approach to establish quality of measurement In my own simple words, L calibration establishes the center of the smith chart,
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Erik Kaashoek
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#9142
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Re: errors of "error" models
Gary, are you saying that different "characterized" SOL standards, when measured after calibration, produce identical results. (-1,0,1)? If so, this is not true -- they produce the results equivalent
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Jeff Anderson
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#9141
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Re: NanoVNA-saver and Windows XP
I had what seems to be the same problem, but with the last version, updated Windows Vista Professional. The error message was "could not load Qt platform plugin "windows" in "" even though it was
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DougVL
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#9140
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Re: Crystal measurements & QEX review
I find it interesting that some very educated folks like Dr Stebers are quick to critique things but you rarely see them helping with the creation of improved documentation or helpng others on the
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Larry Rothman
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#9139
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Re: Cancelling out coax feeder length?
Search under the concept of de-embedding and on the vna you will use the function electrical delay. 73' Alan
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alan victor
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#9138
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Re: NanoVNA-saver and Windows XP
I know that. As a matter of facts, on this PC I have a dual boot with Debian Buster. And the main HD is an SSD (I have 4 additional disks on this tower). Yes, I could boot with Debian and run
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Alberto I2PHD
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#9137
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Re: Crystal measurements & QEX review
His overall impression seems pretty favorable - like many of us amazed that such performance could be available at such a price. He found impedance measurements to be very good in the range of 12 to
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Nick Kennedy
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#9136
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Re: What is the best method to measure a stripline impedance with the nanoVNA????
Thanks , it worked out very well. Given a 900MHz max frequency I was able to use a 2 inch stripline, find the frequency for its 1/4 wavelength and then measure the reactance at 1/2 the 1/4 wavelength
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Erik Kaashoek
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#9135
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Re: errors of "error" models
Good morning Erik; @ Erik... I believe the reference to "absurdness of identicality" was with respect to the notion that different load values... which, when calibrated, produce identical results (-1,
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Gary O'Neil
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#9134
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Re: NanoVNA-saver and Windows XP
Pentium 4 machines (originally with Win XP) run very nicely with any of the popular Linux distros (like Linux Mint 19.3) ,obviously 32 bit . With a ( nowadays low cost) SSD the system is fast . Go for
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Frank Dinger , EI7KS
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#9133
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Re: errors of "error" models
GIN&PEZ I failed to include in my summary... @ Gary O¡¯Neil - /g/nanovna-users/message/9128 the also very revealing and important consequence of polynomial error correction attempts;
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Gary O'Neil
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#9132
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Re: errors of "error" models
@gin&pez On this group we have people that live in the percentage world (me) and people that live in the "per millionth" world (such as Dr. David Kirby) For those that live in the percentage world
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Erik Kaashoek
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#9131
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Re: errors of "error" models
#105: On the Absurdness of the Identicalness of All Standard Loads in this World... @Gary O'Neil , N3GO - 4 January 2020 Dear Gary, Thank you for your time you spend all these months to comment on our
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gin&pez@arg
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#9130
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Re: NanoVNA-saver and Windows XP
It can be upgraded to Linux, under which NanoVNA-saver runs just fine.
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Jim Allyn - N7JA
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#9129
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Re: errors of "error" models
Hello GIN&PEZ; @ GIN&PEZ - /g/nanovna-users/message/9108 #103 : The Fourth Load * ¡°It seems that the ratio of these two cross-ratios, the one of the loads and the other one of their
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Gary O'Neil
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#9128
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Re: Cancelling out coax feeder length?
I was wondering a similar thing, more generically how do you test an antenna with an UN-removable length of cable.... ? -- Regards, Chris
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Chris K2STP
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#9127
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Re: errors of "error" models
#104': On the Criterion of Cross-Ratios - Errata Section 1 - In 3rd line from below, instead of the wrong : "Thus there is by any chance possible", the correct : "So, there is not by any chance
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gin&pez@arg
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#9126
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Re: errors of "error" models
@Gary O'Neil , N3GO - 3 January 2020 /g/nanovna-users/message/9087 Dear Gary, Yes, it is. Happy New Year 2020 ! gin&pez@arg
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gin&pez@arg
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#9125
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Re: errors of "error" models
#104: On the Criterion of Cross-Ratios @Erik, PD0EK - 2 January 2020 - /g/nanovna-users/message/9074 Dear Erik, Thank you, very much indeed, for your time spent on these questions. 1
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gin&pez@arg
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#9124
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Re: Crystal measurements & QEX review
On Fri, Jan 3, 2020 at 02:56 PM, Nick Kennedy wrote: " ¡ I should have mentioned that the QEX article was probably pretty out-of-date by publication time ¡"
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hwalker
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#9123
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