Release Firmware CEC Version 0.1 for Antenna Analyzer(EU1KY)I would like to thank EU1KY and DH1AFK OM for making and improving this wonderful antenna analyzer. The Antenna Analyzer is already perfect enough. I just want to add a little bit. This project will continue until CEC Version 1.0.
1.Introduction - http://www.hamskey.com/2019/02/faa-450-antenna-analyzer-eu1ky.html
2.Create FAA-450 - http://www.hamskey.com/2019/02/assembling-faa-450-antenna.html
3.How to update the Firmware - http://www.hamskey.com/2019/02/3-antenna-analyzereu1ky-how-to-update.html
4.How to Setup and Calibration - http://www.hamskey.com/2019/02/4-antenna-analyzereu1ky-how-to-setup.html
5.Principle of Antenna Analyzer
6.Antenna Analyzer Firmware Improvement (this article)
1.Improvements in CEC Version 0.1
1.1 Program stabilized
Did Antenna Analyzer occasionally freeze during operation? People around me and me have often had that experience. If you have such experience, please upload and test this firmware. I would really appreciate it if you could let us know your test results in this post comment or in my email.
I have fixed a few things for stability.
1.2 Improve measurement speed
I increased the speed by adding a little extra code when measuring the frequency range.
Frequently used is an icon on the desktop. but this is not fixed. It may change several times until it becomes CEC Version 1.0.
1.4 Tracking Scope
I have several VNA and I use it mainly to measure filters when I use VNA for amateur radio.
The high-end Spectrum Analyzer has RF Generator Mode, sets the tracking mode, and measures the transmission characteristics according to frequency. It is similar to S2 -> S1 measurement of VNA. (Phase measurement excluded)
That's what I created.
To do this, the S2 port must be added. The S2 port is simply connected to the CLK2 of the Si5351. CLK2 is an unused PIN.
Please see below link for details.
If you need more advanced VNA functionality in addition to Tracking Scope mode, we can make it together. But the RF board seems to have to be redesigned.
There was an opinion of DH1AKF. It is not necessary to test the filter and the transmission line which are not connected to electricity like me, but if you need to measure directly by using the probe on the PCB with the electronic parts, you can use 2 ~ 3 resistors and 1 capacitor You will be able to add. (The performance of the tracking scope may be degraded if you apply this)
I am making another Antenna Analyzer, and I will apply Probe Safety there.
Please refer to the link below for how to update the firmware.
The source code will be released through the github or zip file at the end of the Beta version.
3.How to use
The EU1KY Antenna Analyzer is already in wide use and you can easily find the usage on the Internet.
The video below shows an example of using the Tracking Scope, an added feature.
How to use Tracking scope has been registered as a subtitle in the video above.
The pictures below are capturing only the main parts.
Probe for measurement
Connect to S1, S2
Calibration for Tracking Scope function
Test filter ( Low pass filter for ~ 5Mhz)
Measurement result 1
Measurement result 2
I will post more examples of using the Tracking scope feature.
This project will continue until CEC Version 1.0. If you want to be added, please email me.
Thanks for reading.