Posted on March 4, 2009
Im sure most of you have used 2 way radios with pl tones or Continuous Tone-Coded Squelch System (ctcss), most of the bubble pack radios on the market have these tones as added privacy or to tone the squelch on a repeater. My gmrs handhelds have this option and can even be set for groups in case you need to send messages to only certain people, while the other groups will not get the message.
Many users can be on one frequency without interfering with anyone else.
So anyway, what if fm radio stations used this feature?
For example, on 97.7 fm there could be 3 stations in a 20 mile radius sharing this frequency but all three stations will be using different tones, the listener would choose 97.7 fm and press a scan button that would scan for all stations on 97.7 fm, maybe playing a few seconds of that station before moving to the next station.
It would seem like this would work but on the same token, there is the possibility of interference, so power levels would have to be controlled somehow.
It would be great if this would work, think of all the stations that could share the same channel being more efficient and possibly fitting more stations on the fm dial.
Maybe this idea can be used in some of the low vhf bands like 46 to 49 mhz while fitting many more stations on a small slice of spectrum.
Maybe get rid of IBOC too lol yeah right!
Just one of the many crazy ideas rolling around in my head.