NFM

[SPERT20906]

Whhat is NFM [saw it on the scanner com wb page on the main screen.

thanks

BOB

 

[N_Jay]

Whhat is NFM [saw it on the scanner com wb page on the main screen.

thanks

BOB

I would guess Narrow FM, which technically means anthing with a bandwith of 50 Khz or less for voice, but is recently being used to mean the new 12.5 KHz width channels and/or the ability to tune the center frequencies of those channels.

 

[SPERT20906]

Thanks & God bless

 

[scanfan03]

Whhat is NFM [saw it on the scanner com wb page on the main screen.

thanks

BOB

Do a search on this site about NFM and you will find a lot of posts already about it that will answer your question.

 

[SPERT20906]

thanks

 

[scanfan03]

no problem.

 

[DaveH]

Up until recently, most land-mobile voice "narrow-band" has
been 5kHz frequency deviation. The highest audio frequency
is about 3kHz. A simple formula for the bandwidth (occupied)
is: twice the deviation plus twice the highest audio frequency,
which works out to 16kHz.

To conserve bandwidth, a new low-deviation FM is being
used: 2.5kHz deviation, 3kHz audio bandwidth (as above).
The occupied bandwidth is 11kHz.

It can be a bit confusing, since some scanners refer to
the narrower one as NFM. They are all "narrowband",
compared to broadcast FM.

Dave

 

[SPERT20906]

thanks