Electronics > Projects, Designs, and Technical Stuff
Measurement of Q-factor with modern hardware ?
(1/3) > >>
cdev:
I am wondering if anybody has used any of the newer all in one tools (for example, various newish DDSs or the ADALM2000 or Analog Discovery 2) to set up some easy automated way to measure inductor Q up to some fairly high frequency, somehow?

ogden:

--- Quote from: cdev on December 07, 2018, 07:41:27 pm ---I am wondering if anybody has used any of the newer all in one tools (for example, various newish DDSs or the ADALM2000 or Analog Discovery 2) to set up some easy automated way to measure inductor Q up to some fairly high frequency, somehow?

--- End quote ---

DDS alone is not enough - it's just signal source. You need to add at least two phase-coherent receivers - to do RF I/V impedance analysis. ADALM2000 is 1-10MHz bode analyzer out of the box, at least they say so. Then goes some [unverified] google search results: VNA /w Analog Discovery, VNA out of Lime SDR. Looked into this just because I was interested in answer to your question as well.
jbb:
You might be able to find an LCR meter with communications and a high enough test frequency.
cdev:
Thank you for these links. Lots of interesting info at the myriadrf one especially.

I wish I could afford a network analyzer. That is what I really need to do antenna stuff especially.

I should try to build one from one of the projects floating around on the net.


--- Quote from: ogden on December 07, 2018, 08:43:53 pm ---
--- Quote from: cdev on December 07, 2018, 07:41:27 pm ---I am wondering if anybody has used any of the newer all in one tools (for example, various newish DDSs or the ADALM2000 or Analog Discovery 2) to set up some easy automated way to measure inductor Q up to some fairly high frequency, somehow?

--- End quote ---

DDS alone is not enough - it's just signal source. You need to add at least two phase-coherent receivers - to do RF I/V impedance analysis. ADALM2000 is 1-10MHz bode analyzer out of the box, at least they say so. Then goes some [unverified] google search results: VNA /w Analog Discovery, VNA out of Lime SDR. Looked into this just because I was interested in answer to your question as well.

--- End quote ---
ogden:

--- Quote from: cdev on December 07, 2018, 10:52:59 pm ---I wish I could afford a network analyzer. That is what I really need to do antenna stuff especially.

--- End quote ---

VNA for antenna tuning is gigantic overkill, especially for hobbyist who say that can't afford it ;) W2aew video below will explain how you can do occasional antenna stuff without breaking bank. His youtube channel is treasure, make sure to check other videos and obviously subscribe (i am not affiliate, just fan).



[edit] Hate this forum engine which throws in thumbnail of the video - needed or not.
Navigation
Message Index
Next page
There was an error while thanking
Thanking...

Go to full version
Powered by SMFPacks Advanced Attachments Uploader Mod