Originally Posted by RUSHFAN
Hello gents. Just wanted to know what "FMN" signified in some mode listings in the database. Would
appreciate any info.
FM Narrow / narrowband FM. Typically, FM would be 20 khz or thereabout, and NFM would be 11.25 khz or less. If your scanner doesn't do narrowband FM, it's not a big deal. But if your scanner does have an NFM mode, you should use it on those frequencies that are listed as NFM.
That's in a nutshell. Someone with more knowledge of the whole requirements of agencies switching to narrowband will likely chime in with better info.