In broadcasting an adjacent channel is an AM, FM, or TV channel that is next to another channel. First-adjacent is immediately next to another channel, second-adjacent is two channels away, and so forth. Information on adjacent channels is used in keeping stations from interfering with one another.
Channel plans and modulation schemes for both new and existing transceivers must be interoperable and capable of immediately participating in the VHF maritime distress and safety system if narrowbanding is implemented.
The power of the adjacent transmitters was 25 watts and three cases of antenna heights were considered: 3 meters, 3 and 10 meters, and 10 meters.
Adjacentchannel separation distances were also calculated for a narrowband receiver versus a wideband transmitter off-tuned by 12.5 kHz.
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