Frequency Question

[SCPD]

So I have a question about narrowbanding so I have an example

451.400/151.400 would be a 25 khz freq?
what would 155.865 be? this is a narrowband frequnecy?
what about 155.8725?

whats is the diff between:

483.150 and 483.1625? im just trying to figure out who is narrowbanded and who is not just by looking at the frequency.

thanks.

 

[captclint]

S im just trying to figure out who is narrowbanded and who is not just by looking at the frequency. thanks.

All public safety groups have to convert to narrow band shortly. This has to do with the bandwidth of the transmission, so existing frequencies will be narrow band, along with any of the newer frequencies in between. You may experience a drop in volume on those old frequencies, but otherwise you won't know they have been converted. So 483.150 and 483.1625 will both be narrow band. See: http://wiki.radioreference.com/index.php/Refarming

 

[W8RMH]

im just trying to figure out who is narrowbanded and who is not just by looking at the frequency.
thanks.

You can't tell just by the frequency because they may or may not change.

The easiest way is to look for the Emission Designator.

Usually a license with a 20K0F3E has not narrowbanded whereas a 11K2F3E has.