12.5Khz spaceing

[gunz2000]

Wirelessly posted (BlackBerry9300/5.0.0.846 Profile/MIDP-2.1 Configuration/CLDC-1.1 VendorID/107)

hello, I'm programing my radios to a frq that a group of guys I hunt with use and when I called the store they got them from he told me that my radios are not narrow band and that the channels they use are and my radio will not do that
Here is what I got
Motorola P200 UHF
There frq is ch1 462.XXX
And ch2 is 467.XXX
Ch1 uses a DPL and Ch2 uses a PL
I entered this in the RSS and it excepted it and loaded into the radio
My question is am I going to have any problems
Thanks

 

[CommJunkie]

It depends on what radios they are using. If they are using the radios you buy off a walmart shelf (commonly called Bubble pack radios), then they are probably narrowband. If you are using the same radio as them, then they would be wideband.

Frequencies are not narrowbanded, it's the radios using the frequencies that are narrow or wideband. Someone can not tell (at least until 2013) if a freq is narrowband or wideband just by knowing the frequency.

 

[gunz2000]

Wirelessly posted (BlackBerry9300/5.0.0.846 Profile/MIDP-2.1 Configuration/CLDC-1.1 VendorID/107)

One channel is 50Khz above gmrs and one is like 7khz under a gmrs or something like this and the frq's where issued by industry canada

 

[CommJunkie]

Oh, you're in Canada. You have now stepped out of my comfort zone lol. I don't know anything about Canadian radio stuff.

 

[chrismol1]

The Motorola Radius P200 is an late 80's and early 90's portable that is not capable of 12.5khz channels
Whatever frequencies you have programmed in are not narrowband channels

 

[RKG]

To the OP: you should differentiate in your mind "channel width" (i.e., how much spectrum is occupied by a given FM channel when transmitting fully modulated voice?) and "channel spacing" (i.e., what is the gap between adjacent FM center frequencies that the firmware of a given radio will accept?).

A generally accurate rule of thumb is as follows:

So-called "wideband" channels tended to be spaced at even 0.025 MHz (in the UHF bands), had a max deviation of 5.0 KHz, and tended to occupy about 16 KHz of spectrum.

So-called "narrowband" channels tend to be spaced at even 0.0125 MHz (in the UHF band), have a max deviation of 2.5 KHz, and tend to occupy about 11 KHz of spectrum.

The fact that a given radio will tune to a 0.0125 offset from an even MHz does not mean that it is narrowband.

Hope this helps.