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First of all I must explain that I am pretty much a newbie when it comes to spectrum analyzers and I apologize if the answer to my question should be obvious.

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I have a TinySA and I've been working on an amateur DMR repeater that is using a Repeater Builder STM32-DVM controller. It became necessary for me to null out the FM carrier and the Bessel null procedure was recommended. However, I wasn't able to properly discern any carrier level changes when adjusting the Tx on the controller. To my understanding, the High channel input does not have enough resolution but the Low channel input does. All the examples of using a TinySA that I can find seem to be performed on a VHF or lower frequency.

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My question is this, would a TinySA Ultra+ model work in this situation? If so, any help with setup recommendations would be greatly appreciated.

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Regards and thanks in advance,

Chris

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The Ultra is much better for doing Bessel nulling, its resolution bandwidth is much narrower.

Gary

W9TD

Not to mention 1 port handles it's whole frequency range... Get an ultra?!

Not sure what you are trying to do or why with the repeater but if you have an older FMradio you can tune to the test signal connect the SA to its 10.7MHz ((etc) IF signal before the demodulator and watch the signal there instead - much easier?