Skip to main content

Use the filter and Attenuator to test the VNA(Track scope) function in Antenna Analyzer

Use the filter and Attenuator to test the VNA(Track scope) function in Antenna Analyzer
I have measured the performance of the S2 port added to the EU1KY Antenna Analyzer.
 
1.Introduction - http://www.hamskey.com/2019/02/faa-450-antenna-analyzer-eu1ky.html
6.Antenna Analyzer VNA(Track scope) Test (this article)
 
1.Comparison of measurement results between commercial instrument and AA for filter
1.1 45.1 Mhz
I used a filter on a Motorola radio.




The filter is attached to the socket.





Measurement result of AA



Testing on a Spectrum Analyzer with signal generator


Measurement result of Spectrum Analyzer with signal generator


 The characteristics of the filter are similar to each other when viewed with AA and a commercial instrument.



1.2 50.1 Mhz
50.1Mhz Filter from YAESU FM transceiver.


Measurement result of AA




Measurement result of Spectrum Analyzer with signal generator


Video





2.Attenuator
I used the attenuator to check the measuring range.
Connect the attenuator to S1 and S2.


Calibration


 I set the range from 1 to 100 MHz.
0dB




-5dB


 The measurement result indicates -5dB.



-10dB


 The measurement result indicates -5dB.



-25 dB


 It is -25dB which starts the problem at 80Mhz or higher.
I recommend that the filter test be done at 70Mhz or less.
When measuring within -25dB, all frequencies are available.



I changed the frequency range from 1 to 40 MHz.

-50dB

Measurement is possible up to -50dB, Most filter measurements are possible with -50dB.


-60dB (The maximum value of my attenuator)




 Measurement is not possible up to -60dB.

Video



3.conclusion
Maybe if you have a more sensitive attenuator, the range you can use can be measured even wider.

If you measure up to -25dB, you can use it at most frequencies. If you make a filter of 60Mhz or less, you can measure up to -50dB.






Comments

  1. HELLO IAN
    it will be nice if you can make cursor vertical lines right and left if you determinat the filter bandwith so that you can set bouth lines left or right
    but in all good job nice .
    regards vojko
    de S52E

    ReplyDelete
    Replies
    1. Thank you for your good opnion.
      Maybe it would be good to compare dB. I will put the feature in the next version.

      Ian KD8CEC

      Delete
  2. You have been busy Ian!
    It looks excellent. I will definitely be doing the transmitter mod on my EU1KY in the near future.
    73
    Gerry / EI8DRB

    ReplyDelete

Post a Comment

Popular posts from this blog

Release CEC Firmware v1.200 for uBITX All version(include V2, V3, V4, V5)

Release CEC Firmware v1.200 for uBITX All Version (include v2, v3, v4, v5) I did the firmware work for v5 when uBITX V5 was released, but I release it now.
I received the feedback from a thankful beta tester and tested it myself by converting my uBITX v3 to v5 but I was not sure.

I ordered the uBITX V5 and delivered the correct uBITX V5, so I made a little more fine-tuning.
If you use V2, V3, V4, you do not need to update this firmware.

uBITX with Nextion LCD (CEC Firmware) - Installation and Introduction

uBITX with Nextion LCD (CEC Firmware) - Installation and Introduction uBITX CEC Firmware supports various LCD since Version 1.08 (16x02 Parallel, 20x04 Parallel, 16x02  I2C, 20x04 I2C, 16x02 Dual LCD with I2C).
Supports Nextion LCD (Graphic LCD) from Version 1.09, Version 1.09x is primarily aimed at Nextion LCD support. Also 1.09x will continue to be Beta version. If you want a stable version, please use 1.08 or 1.1 version to be released in the future.

Release EU1KY AA Firmware CEC Version 1.01 and 1.0a

Release EU1KY AA Firmware CEC Version 1.01 and 1.0a
It is the stabilized final version of EU1KY AA. Updates starting with Version 0.1 continue to add features. Please refer to the link below for added features.

I have separated the Version to 1.01 and 1.0A for users who want to use AA only for instrumentation purposes.

*  If you want to use all the features added up to Version 0.71, please use Version 1.0A.
*  If you want to use it only for instrument use, please use Version 1.01



Version V1.0A


Version V1.01



1.Download Firmware Version 1.01 and 1.0a
https://github.com/phdlee/antennaanalyzer/releases
Version 1.01 (Version with only antenna analyzer function) https://github.com/phdlee/antennaanalyzer/releases/download/v1.01/AA_CEC_V1.01.zip
Version 1.0A (Version with all features added up to Version 0.71) https://github.com/phdlee/antennaanalyzer/releases/download/v1.01/AA_CEC_V1.0A.zip
ConvertRXP (Converters for using AA measurement data in other tools such as Matlab) https://github.com/phd…