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   Home   Help Search  
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Author Topic: Antenna Analyzer with STM32F7 (homebrew) from EU1KY  (Read 23788 times)
DH1AKF
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« on: December 22, 2017, 02:32:26 AM »

Hello,
after successful building this famous analyzer, I want to announce it here.
Please have a look into the gallery:

https://bitbucket.org/kuchura/eu1ky_aa_v3/wiki/Gallery

Some landmarks:
- frequency range: 500 kHz  ..  450 MHz
- uses a touch screen (STM32F7 Discovery)
- calculates real and complex antenna impedance
- shows the Smith- diagram
-calculates the matching values for LC- adaption
- all software is open source.


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DH1AKF
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« Reply #1 on: January 01, 2018, 02:30:56 AM »

A Happy New Year to all visitors!

Here a picture of the "Measurement" menu:



A little article about my modifications you can find here:

http://www.wkiefer.de/x28/EU1KY_AA.htm
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DH1AKF
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« Reply #2 on: January 22, 2018, 02:19:31 AM »

A new design was created by help of 15 russian beta- testers:







The source code can be found at:
https://bitbucket.org/kuchura/eu1ky_aa_v3/branches/
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DH1AKF
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« Reply #3 on: April 20, 2018, 08:39:47 AM »

News from my Analyzer project: (EU1KY- AA450)
- frequency range exceeded, now from 100 kc to 600 Mc with the same hardware
- separate tuning window with sound and big progress bar for use in open air
- shows R and X values for the serial or parallel model, calculates resulting L and C

http://www.wkiefer.de/x28/EU1KY_AA.htm

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DH1AKF
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« Reply #4 on: May 06, 2018, 11:43:21 AM »

New results of my development:
Outdoor- mode for SWR- optimisation:



"Find Frequency scan mode":



Simple spectrum analyzer:



You have more ideas? Please reply!
« Last Edit: May 06, 2018, 11:45:38 AM by DH1AKF » Logged
DH1AKF
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« Reply #5 on: May 17, 2018, 04:18:34 AM »

Now are available:
- Russian Manual http://www.cqham.ru/forum/attachment.php?attachmentid=289144&d=1526543660 from LY2BOK

- English Manual  http://www.cqham.ru/forum/attachment.php?attachmentid=289133&d=1526519722 from VK5COR
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DH1AKF
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« Reply #6 on: June 11, 2018, 09:48:28 AM »

An idea of a different kind: It would be awesome if someone would find a buried treasure with the AA EU1KY! As a search coil a magnetic loop for 300 kHz, adapted to 50 ohms, and then you can start the search ...
Menu TUNE SWR // Sound, (to hear something)
Just an idea ...
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K9AQ
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« Reply #7 on: June 16, 2018, 06:32:31 AM »

I have purchased the analyzer and can't wait to get it!  I like the changes that you made to the software.  I will play around with it using the software it comes with, but then would like to install your modified software. 

Thanks

73,

Don
K9AQ
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K9AQ
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« Reply #8 on: June 25, 2018, 06:00:40 AM »

I have received my Eu1KY analyzer and have been testing it with the installed firmware.  I appreciate the enhancements that you have made and would like to install your software.  Do you have instructions on how to install your software to the STM32F7 board?

Don
K9AQ
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DH1AKF
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« Reply #9 on: June 25, 2018, 06:55:54 AM »

Firmware update
Programming is done with the STM32 ST-LINK Utility from ST Microelectronics at the ST-Link connector. (USB mini plug)
https://www.st.com/en/development-tools/stsw-link004.html

 Target> Connect: connect to the device
 File> Open File ...: load firmware in binary form
 Target> Program & Verify: program and verify
The latest version of the extended firmware can be found here:

http://www.wkiefer.de/x28/test/F7Discovery.bin

If you have more questions, please ask!
73, Wolfgang
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K9AQ
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« Reply #10 on: June 25, 2018, 11:35:24 AM »

Thanks!
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K9AQ
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« Reply #11 on: June 25, 2018, 11:41:30 AM »

Wolfgang,

I bought mine assembled, tested and calibrated.  After I install you firmware will I have to recalibrate it?

Don
K9AQ
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DH1AKF
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« Reply #12 on: June 25, 2018, 12:11:11 PM »

Yes, because the edge frequencies and the structure of some files is changed.
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DH1AKF
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« Reply #13 on: July 04, 2018, 12:40:28 AM »

Now I found a description, how to make the OSL- calibration resistors themselves:

https://forum.nvra.net/viewtopic.php?f=79&t=70
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KD2PTC
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« Reply #14 on: August 28, 2018, 01:22:35 PM »

I just finished building my analyzer and am having a problem so I wondered if anyone can comment on the following:

    When I try to do the HW Calibration. It gets up to 91% and then a message appears in the top left of the screen that says "No Signal. SYSTEM HALTED". I rebooted the system and tried again and it failed the same way.
 
    When I look at the DSP window, the magnitudes are about 1991 and 2093.  The instructions say it should be 1200-1600.  Are my values too high and too different from each other?

The main menu screen says I am running 'mod DH1AFK, Build 2018-08-10 19:58 UT'

Any help would be greatly appreciated. Thanks.
Karl
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