Note that 430MHz systems come in two flavors... VSB (vestigial sideband) and AM. At 1.2GHz and above, all these systems use FM due to the larger chunk of spectrum available.
Usually people are using 1.2 Ghz, 1.3Ghz, 2.4Ghz or 5.2Ghz for videos. And those systems are easy to find. There are systems below 1Ghz but not easy to find them. you might get some around 430Mhz..
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