Narrow Band ????

[kc0rnp]

I have been told by a radio dealer in Southern IL that when every Public Service Department goes to Narrow Band there current freqs will not be the ones they will be using. Like 154.07 is used for CoalBelt but when everyone goes to Narrow Band I have been told the freq will be 154.2725 or something like that. To me this does not make any sence as if you look at MURS you will see that the upper freqs of 151.820 151.880 and 151.940 are all to be Narrow Band. So anyone know if this is true about the freqs having to be changed?

I do understand that everyone has tell 2012 to do Narrow Banding, but trying to understnad all of this.

 

[N9JIG]

The FCC has mandated that current wide bandwidth channels be converted to narrower bandwidth to accommodate additional channels being inserted between original channels. This has happened several times before, prior channel spacing in the VHF Highband had been 60, 30 and 15 KHz., the new standard is 7.5 KHz.

Current wide bandwidth licensees can continue to operate but no new licenses are issued for wide channels and the operations will have to convert to narrow band by the deadline. They can remain on the existing channels after converting to narrow band but many operations are switching to new narrow channels instead to avoid congestion on the older channels and to increase operational resources by using narrowband repeaters to replace wideband simplex channels.

MURS and FRS have specific bandwidth and power requirements. They took existing business band and some new and existing GMRS channels, established technical restrictions including power limits and made other rules for these services. These are similar in scope as the public safety narrow band rules, it just happened that the MURS service did not use the interstitial channels.

 

[RADIOGUY2002]

Yes, they are in the process of change. A process of the future to make more agencys or business opearte in the spectrum. Somthing that should have been forced into effect sooner so that their would be as much as a hardsip for some with limited budgeting. But, the again their are changes in inter-agency systems. So be happy that you can still hear them.

 

[Starcom21]

Remember, 154.0775 and 154.0625 are narrowband frequencies, (The way we think of it now), but 154.07 will also be a narrowband [ONLY] frequency eventually. This way the split between all frequencies are the same (.0075)

Again, 154.07 will still be used but in NARROWBAND emission instead of WIDE emission.

For more info on "Rebanding", see the RR Wiki:
http://wiki.radioreference.com/index.php/Rebanding

Also here...
http://mabasradio.org/Sub_Main_Pages/Narrowband.htm

FCC Info on emissions (on the license data): http://wireless.fcc.gov/services/index.htm?job=licensing_2&id=industrial_business

FCC Info on "Refarming"
http://wireless.fcc.gov/services/index.htm?job=operations&id=private_land_radio