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Kirkby calibration kit alternatives?

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hendorog:

--- Quote from: Mechatrommer on February 26, 2018, 02:20:02 pm ---
--- Quote from: hendorog on February 26, 2018, 06:02:38 am ---If you extract the data then you can still do better using scikit-rf. It supports a calibration type called 'Two Port one Path' or something like that. Basically you can do a full 2 port cal with only one directional coupler. You do need to swap around the DUT to measure both ports.
However to do this, first you need to be able to extract the raw data for the sweeps and transfer it to a PC. Then use software on the PC to do the calibration instead of using the software inside the KC901V.

Without doing a cal of the device, you do a sweep of your cal standards, and export them each into different files - i.e. short.s1p, open.s1p, load.s1p, thru.s1p and the device you want to test dut.s1p. Then you should be able to use those files containing 'raw data' with software like scikit-rf or Metas to do a calibration and measure the device on your PC.

--- End quote ---
i think this is the missing piece for me to all of your discussions here, thanks i'll try to catch up. but the downloaded META VNA Tools II only works on Windows later than Vista, so my WinXP cant installed, another |O moment... i'll try install it in another Win10 PC.


--- Quote from: hendorog on February 26, 2018, 06:02:38 am ---Check the 'Data Saving' section of the manual. I found it online, apparently you can export s1p data files to an SD card in the smith chart mode.

--- End quote ---
correct. i'll study this more seriously when i got installed any VNA tools. thanks.


--- End quote ---

Cool.

Now that I have Metas I think you are better off using scikit-rf for this type of thing. Metas is obviously targeted at Metrology and lab work, and as such is very 'rigorous' in its processes. Having worked in a lab (food not RF!) before I recognise the focus on recording everything, traceability of measurements, cables and adapters used for the measurement etc etc.
I am not even sure yet what it can and can't do! This is just my impression from using it once so ymmv.

scikit-rf is a much more techy to get installed and working, but has more flexibility so I will use that for experimentation.

Mechatrommer:

--- Quote from: hendorog on February 26, 2018, 07:56:49 pm ---scikit-rf is a much more techy to get installed and working, but has more flexibility so I will use that for experimentation.

--- End quote ---
i am heavy butt lazy arse nowadays that i expect a ready made exe, i dont have much more time for long step by step install of Anaconda, Phyton learning etc. but i'll try that if i cant work out META... thanks.

hendorog:


--- Quote from: Mechatrommer on February 27, 2018, 03:51:59 am ---
--- Quote from: hendorog on February 26, 2018, 07:56:49 pm ---scikit-rf is a much more techy to get installed and working, but has more flexibility so I will use that for experimentation.

--- End quote ---
i am heavy butt lazy arse nowadays that i expect a ready made exe, i dont have much more time for long step by step install of Anaconda, Phyton learning etc. but i'll try that if i cant work out META... thanks.

--- End quote ---

Yeah I can understand.

It actually was quite straightforward though as anaconda takes care of installing python, scikit-rf and all of the dependancies, including a simple IDE. Certainly it is much easier than back when anything python related had to be installed manually, package by package. Now that was a pain in the a$$.



hendorog:
New thread with install guide for the IN3OTD script is here:
https://www.eevblog.com/forum/rf-microwave/vna-cal-kit-modelling-script-install-guide/

hendorog:
In other news, on his Test Equipment group Dr Kirkby offered a couple of out of spec cal kits at a low price.

Since these come with s-params I grabbed one of them. Shipping is very high, but ultimately still worth it for me to have items which I can use as a calibrated reference.

https://groups.io/g/Test-Equipment-For-Sale-Wanted-or-Exchange

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