• Effective immediately we will be deleting, without notice, any negative threads or posts that deal with the use of encryption and streaming of scanner audio.

    We've noticed a huge increase in rants and negative posts that revolve around agencies going to encryption due to the broadcasting of scanner audio on the internet. It's now worn out and continues to be the same recycled rants. These rants hijack the threads and derail the conversation. They no longer have a place anywhere on this forum other than in the designated threads in the Rants forum in the Tavern.

    If you violate these guidelines your post will be deleted without notice and an infraction will be issued. We are not against discussion of this issue. You just need to do it in the right place. For example:
    https://forums.radioreference.com/rants/224104-official-thread-live-audio-feeds-scanners-wait-encryption.html

What does NFM mean?

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DaveH

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Ottawa, Ont.
"Standard" narrowband FM (communications, not broadcast) has
come to mean 16kHz bandwidth which comes from +/-5kHz frequency
deviation. That's the amount the carrier frequency can swing
either side of its centre frequency.

NFM in the scanner sense is the newer 11kHz-wide FM, which
is due to lower (+/-2.5kHz) frequency deviation. Continuous
improvements in technology (better filters, more stable/accurate
oscillators, and audio processing) have made this practical,
even in lower-end radios such as FRS.

Dave
 

Rico8458

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Jul 22, 2006
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roger that sir. thanks for putting up with us noobs here. we learning fast though, no choice, but to read and learn...
 

bassmkenk2508

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Rico8458 said:
roger that sir. thanks for putting up with us noobs here. we learning fast though, no choice, but to read and learn...
we were all new to scanning once and these forums on RR make it much easier and informative to learn :)

great site!
 

nexus

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Mississippi
Just since you guys opened up a can of worms....

AM = Amplitude Modulation
FM = Frequency Modulation
NFM = Narrow Frequency Modulation
WFM = Wide Frequency Modulation
SSB = Single Side Band
LSB = Lower Side Band
USB = Upper Side Band
CW = Continuous Wave (Morse Code)
 

doneros

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Feb 20, 2007
Messages
2
Location
SC
NFM and other Info

I'm a scanner user since 1981 - had a Ham (using a friend's license). But this site, the forums and people who participate in the forums have saved "even" me. (lol). I found this page by searching for the meaning of NFM. I recently bought a BCT8 - gave a friend my old Realistic Pro 2021 --- > had the BCT8 only 3 weeks and decided to go to the BCT15X. Sold the BCT8 to my son. It had a learning curve but that curve was mainly related to trunking.
The BCT15X makes me feel like I just moved to a foreign country and can't speak the language. I set the State a few days ago - then put it on AIR tonight - had to do a "reset" to get AIR off. Could not find a way to get it quit scanning AIR, although it was still scanning my local.
So my point in this post is to thank you all > but to ask - once I got it on AIR, I could not find a way to get to stop scanning AIR. No matter what the service I'd love to know how to take it off. I'm a private pilot since 1979 so have used 2-way communications in flying and using the Ham ... But my first Bearcat in 1981 and the Radio Shack scanner I just gave away make me miss them in a way after the intimidation factor built into the new ones. Still I had to move to the BCT15X - and all the reviews about it not coming with a manual are SO true. The CD has 20mb of "HTML" documents > and navigating through them is harder than filing a flight plan.
Last question: Is there a forum section or other place devoted specifically to the BCT15X because I feel like I just fell through the hole and ended up in some wonder-land. Thanks for this great site and all the info I found when I was using my last 2, most recent, scanners. As for the BCT15X; I'm not sure I should have upgraded after only 3 weeks.
 

SCPD

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Feb 24, 2001
Messages
65,126
Location
Virginia
Nfm

So my dumb question would be when do you use it? All or I should cay US Forest service and NP when to narrow band , would you use for this?
 

W2NJS

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Mar 27, 2006
Messages
1,934
Location
Washington DC
"I'm a scanner user since 1981 - had a Ham (using a friend's license)."

Someone please explain what in the hell this statement means. I thought I'd seen it all, or at least most of it, on this Board, but this is a new one to me.
 

nodak1crdet3

Member
Joined
Jan 5, 2008
Messages
546
Location
Detroit, MI
I'm a scanner user since 1981 - had a Ham (using a friend's license). But this site, the forums and people who participate in the forums have saved "even" me. (lol). I found this page by searching for the meaning of NFM. I recently bought a BCT8 - gave a friend my old Realistic Pro 2021 --- > had the BCT8 only 3 weeks and decided to go to the BCT15X. Sold the BCT8 to my son. It had a learning curve but that curve was mainly related to trunking.
The BCT15X makes me feel like I just moved to a foreign country and can't speak the language. I set the State a few days ago - then put it on AIR tonight - had to do a "reset" to get AIR off. Could not find a way to get it quit scanning AIR, although it was still scanning my local.
So my point in this post is to thank you all > but to ask - once I got it on AIR, I could not find a way to get to stop scanning AIR. No matter what the service I'd love to know how to take it off. I'm a private pilot since 1979 so have used 2-way communications in flying and using the Ham ... But my first Bearcat in 1981 and the Radio Shack scanner I just gave away make me miss them in a way after the intimidation factor built into the new ones. Still I had to move to the BCT15X - and all the reviews about it not coming with a manual are SO true. The CD has 20mb of "HTML" documents > and navigating through them is harder than filing a flight plan.
Last question: Is there a forum section or other place devoted specifically to the BCT15X because I feel like I just fell through the hole and ended up in some wonder-land. Thanks for this great site and all the info I found when I was using my last 2, most recent, scanners. As for the BCT15X; I'm not sure I should have upgraded after only 3 weeks.


I would try this site that has easy to read scanner manuals.
Mark's Scanners

Easier to Read BCT15-X Scanner Manual

From what I've read. Looks like you press MENU & then L/O or Scan to back out of what your listening to.
That's weird? Glad I don't have one of these new fangled scanners. ;~)
 
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