Today since many transmitting frequencies are standardized in most countries, and some frequency such as 433.92MHz and 315MHz are very popular in most countries, while this is a good thing about standardization, but it also means you will more likely to experience signal interference.
Signal interference may happen in some countries where 433.92MHz is used a lot, such as UK and some other European countries, as well as Australia.
That’s why nowadays newer openers are using technology called multi-frequency or frequency-hopping, one of the most widely application is ATA PTX-5 trio-code remotes, which use three frequency on 433.5 / 433.95 / 434.4 band, the other possible frequency used are 433.47 / 433.92 / 434.37 band.
In applications, the three frequencies tri-code do reduce a lot of interference, even when two ATA PTX-5 trio-code remotes operate at the same time.
In development of this ATA PTX-5 trio-code compatible remotes, we have also mastered technique to simultaneously transmit at more frequencies, such as 5 or more, please contact us if you need this kind of products.