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Here is a one hour PPT I did in March 2021 on the Nano VNA.
The club that recorded this presentation is in the Philly area.
The first portion is the “business” meeting of the MidAtlantic ARC.
The rest of the video is a basic 3rd grade summary of what a Vector Network Analyzer can do. I try to keep the mathematics to an absolute minimum on the first hour talk.

Part II is another one hour, and delves into reflection coefficient (rho) and Return Loss (dB) and SWR and looks at phase more critically. Translate: more math.
The end of Part II deals with … yes …. Calibration and Smith Charts.

Let me know if you spot the ERROR I made in Part I of the Nano VNA talk.

73
De k3eui
Barry
K3euiBarry-at-gmail.com
West Chester PA

December 06, 2022

Hi Barry, great job with lots of practical examples !

Not sure if it is the error you meant, but at 37' in part 1, when talking about the OSL calibration, you said "from one socket to the other socket ...", that should of course be "at the Reflection socket" (or CH0)

73,
Luc ON7DQ/KF0CR

... and for those that have trouble finding part two:


Barry's talk start around 20' into the meeting

73
Luc ON7DQ/KF0CR

On Wed, Dec 7, 2022 at 02:03 AM, Luc ON7DQ wrote:

that should of course be "at the Reflection socket" (or CH0)

I fail to understand why the designers of all of these VNAs labeled the ports CH0 and CH1, when every other VNA I have used over the past 45+ years has had Port 1 and Port 2.
This just adds to the confusion, especially when trying to explain S-parameters. S21/S12 makes more sense when the ports are 1 and 2, much less so with 0 and 1.
73, Don N2VGU

On 12/7/22 7:31 AM, Donald S Brant Jr wrote:

On Wed, Dec 7, 2022 at 02:03 AM, Luc ON7DQ wrote:

that should of course be "at the Reflection socket" (or CH0)

I fail to understand why the designers of all of these VNAs labeled the ports CH0 and CH1, when every other VNA I have used over the past 45+ years has had Port 1 and Port 2.
This just adds to the confusion, especially when trying to explain S-parameters. S21/S12 makes more sense when the ports are 1 and 2, much less so with 0 and 1.
73, Don N2VGU

zero based indexing. The first person to build one happened to choose CH0 and CH1, and then it stuck.

Matlab and Fortran (and BASIC) follow the mathematician convention of 1 based.
C started zero based because of the array/pointer duality and the desire to keep the compiler simple.

Component numbering usually starts at 1, but often has a hundreds or thousands to indicate which board or assembly (that is, C302 is the second capacitor labeled on board #3)

Yeah - it's kind of like emacs vs vi; or case sensitive file and directory names. Someone picks something, and the rest follow, or not.

"Standards are /good things/...that's why there are so /many/ of them!"

John

at radio station VE7AOV

+++++

On 2022-12-07 07:52, Jim Lux wrote:

On 12/7/22 7:31 AM, Donald S Brant Jr wrote:

On Wed, Dec? 7, 2022 at 02:03 AM, Luc ON7DQ wrote:

that should of course be "at the Reflection socket" (or CH0)

I fail to understand why the designers of all of these VNAs labeled the ports CH0 and CH1, when every other VNA I have used over the past 45+ years has had Port 1 and Port 2.
This just adds to the confusion, especially when trying to explain S-parameters.? S21/S12 makes more sense when the ports are 1 and 2, much less so with 0 and 1.
73, Don N2VGU

zero based indexing.? The first person to build one happened to choose CH0 and CH1, and then it stuck.

Matlab and Fortran (and BASIC) follow the mathematician convention of 1 based.
C started zero based because of the array/pointer duality and the desire to keep the compiler simple.

Component numbering usually starts at 1, but often has a hundreds or thousands to indicate which board or assembly (that is, C302 is the second capacitor labeled on board #3)

Yeah - it's kind of like emacs vs vi; or case sensitive file and directory names.? Someone picks something, and the rest follow, or not.

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