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Finding a signal frequency Via type of antena

Posted: Sun Sep 09, 2018 10:53 pm
by Hoshen_Kadosh
Hi. i am new to sdr. i am trying to find my local emergency sirens frequency. i know from the manufacturer that it can be either UHF or VHF activation via DTMF codes. now, this is the yagi antenna mounted on the siren its self. dose it Looks like its tuned to UHF or VHF? trying to get a Direction where to scan...



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Re: Finding a signal frequency Via type of antena

Posted: Mon Nov 05, 2018 12:53 am
by Remon
In which country or state do you live? You can try to figure out what horns are used, what their size it is and determine the yagi element sizes. Then use an online yagi calculator to find out the frequency.