Products > Test Equipment
Kirkby calibration kit alternatives?
Gandalf_Sr:
I got a floppy disk with calibration data on it when I bought the cal kit from Kirby.
KE5FX:
--- Quote from: Gandalf_Sr on February 22, 2018, 01:38:44 am ---OK, thanks for the advice. I'm travelling right now but I will try to re-calibrate my VNA and then ask the questions along the lines of - Am I doing it right?
--- End quote ---
I have no idea why they're not on YouTube, but there are some videos and other material here that should be helpful:
http://rfic.eecs.berkeley.edu/142/labs.html
technogeeky:
Does anyone here know how long it would take to record all of the relevant calibration coefficients, if someone purchased a open-short-load and sent it to another forum member with access to a good/great VNA?
At the end of the day, when is the modeling necessary? If it's only when you are making your own and trying to improve your design of DIY devices, then we can just bypass that step and send devices to people who can make the measurements for a small fee?
Mechatrommer:
equipments needed should be in 5 digit price. the man should have access to company's equipments, or he must already invested his own money for the cost or borrowed from friend. not to mention knowledge need to be gained so he can answer all customers inquiries about the field. how many VNA customers potentially buying the service? 10? 100 a year? $600 seems reasonable already, imho....
fwiw, among other things, attached is attenuator plot provided from Kirkby to me. the result i got on my VNA is much noisier, so i know something went wrong. i'm ordering stuffs to further verify my VNA condition if its fits for measurement etc later. i hope they will not get lost during CNY...
hendorog:
--- Quote from: technogeeky on February 22, 2018, 05:17:39 am ---Does anyone here know how long it would take to record all of the relevant calibration coefficients, if someone purchased a open-short-load and sent it to another forum member with access to a good/great VNA?
At the end of the day, when is the modeling necessary? If it's only when you are making your own and trying to improve your design of DIY devices, then we can just bypass that step and send devices to people who can make the measurements for a small fee?
--- End quote ---
Yes the modelling would not be required to transfer a calibration from someone elses' cal kit.
In theory, all you need to do is send them the items you want to use as calibration standards and adapters. They just need to generate an S parameter file for each one on their calibrated VNA.
Then you run it through the script to determine the coefficients. How well that step works is unknown.
If you also sent a decent attenuator then that could be used to compare your new calibration with the calibration of the other user.
So they would need a VNA and a good cal kit. Then they would do a calibration first, and then make 5 or 6 measurements, transfer them to a PC and email them. Then ship back the items.
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