Measuring Frequency at minimum SWR?

[Bob.S...@bsege.com]

Hello Everyone,

I am trying to calibrate a controller for a magnetic loop antenna.  To do this I want to measure the optimal frequency for a given tuning point.  If I collect enough data points I can create an automated tuner (pre-tuner?) for the antenna.

Here is the image my SARK-110 produces.

Is there a way I can get the SARK to give me the specific frequency of the minimum SWR?  (the point at the bottom of the green curve...)

Bob

KO2F

[s a]

Hi Bob, I had similar idea for auto tuner at my antenna feed point using  

RigExpert AA-30 zero

Connect to arduino.....

73 Fil

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[John G3PQA]

Hi Bob,
See Page 71 of the manual.
You can set a marker to track any chosen scale reading, in this case it may be VSWR=minimum or Xs=crossing ,  then set crossing value Xs=0, am sure Melchor will confirm the detail. Is that what you are looking for?
The marker frequency is shown at top of scale.
John G3PQA

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[Bob.S...@bsege.com]

Thanks John,

That helped a lot

Is there a way to increase the resolution displayed to something beyond 2 decimal places?  I searched the user manual for "resolution", but didn't find anything relavent.

Bob

KO2F

[melchor...@gmail.com]

Hello Bob,

 

It is not possible. For SWR values less than 10, the readings are shown with two decimal digits. Note that the rounding error of using two decimal digits, is not relevant compared to the accuracy of the analyzer.

 

Best regards,

Melchor EA4FRB

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