errors of "error" models
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@Gary O'Neil , N3GO - 17 December 2019
/g/nanovna-users/message/8292 Dear Gary, Thank you. Well, we are now proceeding carefully, step-by-step, by multi-checking and cross-verifying the results with all available independent procedures, including the [NanoVNA] internal one, as well as both of these you are mentioning, because our two experimental two-ports are consisting of DC Resistive Taus, with a third one being under construction, having in our minds to demonstrate all possible cases by three, representative, as much as possible, practical applications - if it is possible at all, of course, since we don't know and we will see. Anyway, up to now all of the results are too encouraging - permitting a cautious optimism - but we will see. #78'' : #78' was re-corrected 20 November 2019 /g/nanovna-users/message/7272 #80: [S]-parameters from [Z]-parameters 2 December 2019 /g/nanovna-users/message/7657 Best regards, gin&pez@arg |
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@Gary O'Neil , N3GO - 17 December 2019
/g/nanovna-users/message/8294 Dear Gary, Your decision is really great. So, would you allow us, please, to ask you if could you reconsider your other decision: 27 October 2019 - /g/nanovna-users/message/5815 regarding our: 21 October 2019 -/g/nanovna-users/message/5395 invitation? Best regards, gin&pez@arg |
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REF: 17 December 2019 - /g/nanovna-users/message/8335
- Dear Gary: this is obviously another experiment by itself - the objective is to investigate the possibility of an openly edited paper - at least one - and the paper by itself constitutes a concrete knowledge target - needless to say how much interesting we find this scientific procedure - best regards, gin&pez@arg - ps: let us know, please, if it is easy enough for you to get the basic paper by Hackborn from a nearby Library - |
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@Gary O'Neil, N3GO - 18 December 2019
/g/nanovna-users/message/8386 Dear Gary, Thank you for the interesting suggestions. We will prepare and send you two copies - the one with colored underlined highlights. Best regards, gin&pez@arg |
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#86": Two Notes On #86': UPGRADE : On the Results of Measuring Two-Ports
Using Only [NanoVNA] Channel [CH0] or a [LeastVNA] 16 December 2019 - /g/nanovna-users/message/8278 Note 1 At the paragraph (1) of the above, the "the usual form of { -1, 0, +1 }" must be corrected and/or understood as follows: "the usual form of { (-1, 0) , (0, 0) , (+1, 0) } ordered pairs of values in Cartesian form" in accordance with the remarks made at: #73': On the sine qua non Core Uncertainty of AnyVNA - incl. NanoVNA - System 6 November 2019 - /g/nanovna-users/message/6529 Note 2 At paragraph (3) of the above -as well as in general- "The Common User" may have a control on these matters, but only in the extent and depth that is permitted by the manufacturer, who makes available any related information to him. gin&pez@arg :86"# |
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@Gary O'Neil, N3GO : 19 December 2019 :
/g/nanovna-users/message/8399 Dear Gary, [pdf]=>[pdf-xchange-2.5.322.10]:[export-to-image]:[png][300x300-true-color-24 bpp]:[8-pages]=>[cdware][*]:[psp5.0.3]:[sharpen-more][resize:50%][grey-scale] [decrease:16][optimized-nearest][brightness/contrast:0/18]=>[8-images]=>[pdf- -shaper-9.6]:[image-to-pdf][fit-to-page(keep...)]=>[pdf:of-reduced-size]=>[pdf- xchange-2.5.322.10]:[ocr][preserve][medium]=>[pdf:of-reduced-size-with-search] [*] cdware : A Classification of Ware Types : - done - sent - Best regards, gin&pez@arg |
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#87: The 5 Main Points in the First Introduction of an Automatic VNA System
- REF : #85: On the Formation of a Virtual Port - 15 December 2019 : /g/nanovna-users/message/8237 In "An Automatic Network Analyzer System", Microwave Journal, May 1968, p.46 the 5 main points have as follows: but the scaring "nontouching loop rule" mentioned in number 4 is redundant. gin&pez@arg :87# |
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@Gary O'Neil, N3GO : 20 December 2019
/g/nanovna-users/message/8429 Dear Gary, Thank you, very much indeed, because you noticed this ! Well, in our sow this means : "keep the signal flow diagrams, use them to correctly express the relations between a-s and b-s at joining ports, and forget the -most disorientating- "rules" of them". And we used it in this way for more than 25 years until last January 2019, when we found -with much pleasure, indeed- its full independent justification at: D. M. Kerns and R. W. Beatty, "Basic Theory of Wave guide Junctions and Introductory Microwave Network Analysis" [*], Part 2, Introductory Microwave Network Analysis, 2.18 Signal Flow Graph Applied to the Scattering Equations pp.123-124, International Series of Monographs in Electromagnetic Waves, Editors: A. L. Cullen, V. A. Fock J. R. Wait, Volume 13, Pergamon Press Inc, First Edition, 1967: "(f) Comments on use of signal ?ow graphs This technique offers nothing fundamentally new and, if correctly applied, yields the same results one would obtain by solutions of the scattering equations. It seems to be simpler in some eases to write down the solutions by inspection of diagrams rather than by algebraic manipulations. However, one must he careful not to miss any of the loops, and this is a possible source of difficulty, especially when we are dealing with 3-ports, 4-ports, or more complicated networks. As a graphical aid to intuitive thinking about the analysis of systems, it is no doubt valuable, and is therefore a tool to supplement conventional algebraic analysis." Best regards, gin&pez@arg [*] 16 November 2019 : /g/nanovna-users/message/7092 |
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#88 : the G formula - our research work has been completed
Hello, Allow us, please, to present the complete G formula - in our sow and facupov, of course - at: in terms of its measurement g, as well as of S, L, O loads given by their honest manufacturers as (Nominal Value, Uncertainty) couples, and their measurements s, l, o respectively - all complex. By the way, also allow us, please, to announce -with much pleasure, indeed- that our related research work in this very subject - that is on the assumption that the VNA measurement g caused by a connected to VNA load G can be considered as obeying the equations of an irreversible, non-reciprocal, two-port - a virtual-real one consisting of a virtual measurement port and a real load port - along of course with their errors caused by the inaccuracies of these measurements and the uncertainties of these loads - has been substantially completed, since in our Small Objective World sow we can not see anymore any further existing omissions in this picture facupov From A Common User's Point Of View. Sincerely, gin&pez@arg :88# |
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When I use the well known formula's used for calibration (%i16) and I do a linsolve twice to get G expressed in only g,s,l,o,S,L,O and then I write out all the multiplications I get (%o20)
Factoring out your equation gives (%o29) As these are not the same I must be doing something wrong????? -- NanoVNA Wiki: /g/nanovna-users/wiki/home NanoVNA Files: /g/nanovna-users/files Erik, PD0EK |
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@Erik, PD0EK
- REFERENCES: [2] 21 December 2019 - /g/nanovna-users/message/8473 [1] 10 December 2019 /g/nanovna-users/message/8105 Dear Erik, If we understand correctly, we have to start from [1]: and transfer * c o r r e c t l y * their equations to Maxima, as in [1]: and/or as in [2]: /g/nanovna-users/attachment/8473/Check.PNG But, we think that, as it seems, there is a wrong transferring of them regarding some signs, as well as an interchanging of small letters with capital ones regarding the names of variables. Would you check for us, please, these two particular points ? Best regards, gin&pez@arg |
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#89: On the Comparison of our Formulation with that by Erik, PD0EK
- REFERENCES [1] 21 December 2019 - /g/nanovna-users/message/8459 [2] 21 December 2019 - /g/nanovna-users/message/8482 - Hello, Allow us, please, to announce that we uploaded our results, using our copy of Maxima 64-bit 5.43.0 running under our wxp64p&sp2, from our comparison of our formulation [1] with that proposed by Erik, PD0EK [2], at: Also allow us, please, to inform The Common User, who interested enough, that we also uploaded this Maxima program by us, at: Sincerely, gin&pez@arg #89: |
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#90: On the -Second- Arithmetical Method of Error Estimations in
VNA Measurements - REFERENCE: ann : next-to-come : a practical introduction to errors of "errors" 20 December 2019 - /g/nanovna-users/message/8436 Hello, Allow us, please, to inform you that after our presentation of our -First- Analytical Method of VNA Error Estimations Using Complex Differential Error Regions DERs and Real Differential Error Intervals DEIs, - - - - - - (c) gin&pez@arg (cc-by-4.0) 2019 : start - - - - - - we are just starting our step-by-step presentation of our -Second- Arithmetical Method of Error Estimations in VNA Measurements Using Complex Arithmetical Error Regions AERs and Real Arithmetical Error Intervals AEIs, as they introduced by us in: "Measurement Uncertainty in Network Analyzers: Differential Error Analysis of Error Models - Part 1: Full One-Port Calibration", FunkTechnikPlus # Journal, Issue 1, Thursday 31 October 2013, p. v4-18, Fig.1 page 20: [1] excerpt of ftpj: "Total Differential Errors in One-Port Network Analyzer Measurements with Application to Antenna Impedance", Radioengineering, Vol. 16, No. 2, June 2007, p.7, Fig. 7 and Fig.10: [2] excerpt of re: - - - - - #90.00 : A Practical Introduction to our -Second- Arithmetical Method of Error Estimations in VNA Measurements : [SAMEEVNAM] In addition to [1] and [2] above, we also just uploaded our first SAMoEEiVNAM program, as well as and its results, at: regrading our [NanoVNA] operation at ~405 MHz, as follows: [3] Our Maxima Program SAM.20191222.MC: [4] Its Numerical Results: [5] A graphical Error Value result of Real Part Rt of Zt withinin its R-DEI: [6] A graphical Error Value result of Imaginary Part Xt of Zt within its X-DEI: [7] A graphical Error Value Zt within its Z-DER: Notably, this SAMoEEiVNAM is most appropriate for Programming. - - - end : (c) gin&pez@arg (cc-by-4.0) 2019 - - - - - - - - - - Sincerely, gin&pez@arg :#90.00 |
gin&pez@arg
