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 Band width setting for PMR channels

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Templar
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Templar


Call Sign : 26-CT-3550 Ham:- M7DEW
Posts : 90
Times Thanked : 3
Join date : 2019-08-14
QTH or Location : Huddersfield West Yorkshire. UK
Equipment Used : Yaesu FT-450D. CRT SS 6900n. CRT Micron
Age : 63

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PostSubject: Band width setting for PMR channels    Band width setting for PMR channels  Icon_minitimeMon Aug 10, 2020 8:18 pm

Hi all, hope you're all doing O. K. 
I've noticed a lot of activity recently, so I've just programmed all the 16 analogue PMR channels into my CRT MICRON, so I can use the scan function. 
I'm wanting to know which Bandwidth setting to use? 
Choices are:- Wide = 25K   Mid = 20K   Narrow = 12.5K

Cheers and thanks in advance. 
Stay safe 
Dale 
CT3550

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Victor
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Call Sign : 26-CT-3228 Ham M7VIC
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QTH or Location : Bedford
Equipment Used : Various

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PostSubject: Re: Band width setting for PMR channels    Band width setting for PMR channels  Icon_minitimeMon Aug 10, 2020 8:41 pm

Hi Dale,

The channels are spaced 12.5khz apart on the analogue 16 channels and the modulation mode is NBFM, (Narrow Band Frequency Modulation - 2.5khz deviation)

I think that's what you're after? Wink


All the best,
Victor
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Templar
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Templar


Call Sign : 26-CT-3550 Ham:- M7DEW
Posts : 90
Times Thanked : 3
Join date : 2019-08-14
QTH or Location : Huddersfield West Yorkshire. UK
Equipment Used : Yaesu FT-450D. CRT SS 6900n. CRT Micron
Age : 63

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PostSubject: Re: Band width setting for PMR channels    Band width setting for PMR channels  Icon_minitimeMon Aug 10, 2020 9:14 pm

Hi Victor, thanks for the reply. 
Yes, it seems logical that with 12.5khz spacing that the bandwidth is the same, but you never know.
I'm sure someone will be along shortly with a confirmation or the right information. 
I'm new to this pmr stuff but quite frankly I'm having a lot of fun listening so I thought I'd put together a more permanent setup, together with a better antenna. 
It's really very active around here and the additional channels that Ofcom gave us are lively without the usual kids playing about. I guess they only have the 8 channel models. 
I'm surprised at how clear and clean the received modulation is too, much less interference than on the 27Mhz.
I don't know why I didn't have a go with this sooner. 
Anyway stay well mate. 
73's 
Dale 
P. S. Can anyone confirm Narrow setting - 12.5k.?  Cheers
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Red Fox
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PostSubject: Re: Band width setting for PMR channels    Band width setting for PMR channels  Icon_minitimeMon Aug 10, 2020 9:35 pm

Hi Dale,

This may be of some help.

https://www.wildtalk.com/knowledge-base/pmr-446-technical-specification/#:~:text=Bandwidth%2012.5kHz%20%26%206.25Khz%20with%20some%20digital%20modes.

Cheers

Graeme.

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Templar
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Templar


Call Sign : 26-CT-3550 Ham:- M7DEW
Posts : 90
Times Thanked : 3
Join date : 2019-08-14
QTH or Location : Huddersfield West Yorkshire. UK
Equipment Used : Yaesu FT-450D. CRT SS 6900n. CRT Micron
Age : 63

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PostSubject: Re: Band width setting for PMR channels    Band width setting for PMR channels  Icon_minitimeMon Aug 10, 2020 10:13 pm

Cheers for that Graeme. Interesting website. 
Going to program all the channels with the narrow band setting. 

73's 
Dale 
CT3550
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