Re: What Spectrum is Available from 30 MHz to 120 MHz?

Feico de Boer wrote:
> "DAB sounds worse than FM" <dab.is@xxxxxxxxxxx> wrote in
> news:l%0Me.13141 $U36.1073@xxxxxxxxxxxxxxxxxxxx:
>
>> Why not? What spectrum between 30 and 120 MHz do you think might
>> become available for DRM?
>
> My guess, and that is what it says, a guess is that only the FM band
> (band II) will become available for DRM.
>
> Everything between 30 and 50 MHz is mostly military fixed mobile, I
> don't believe they will give that up despite modern cutting edge
> communications technology. There is some other stuff there as well,
> but no large contineous allocation.


Just how much spectrum do the military need? Anybody'd think there's a
frigging war on.


> Between 68 and 88 MHz there is also fixed/mobile. Since space is
> pretty scarse around that area I don't think they will give that up
> either.


Then why can't certain applications be moved elsewhere?


> Currently in The Netherlands we have amongst others the Red
> Cross and (military) police in this band. The police has moved to a
> new digital system above 170 MHz so I don't know what the current
> status is. I think that it should be possible to allocate 68 through
> 88 to broadcast but it will be a hell of a job to get Europe aligned
> for this.


In this day and age of software radios, why does the whole of Europe
need to be aligned?


> And remember, you will not 20 MHz of spectrum elsewhere in
> already crowded VHF-high and UHF bands. Trunking and digital systems
> help to improve density, however demand for frequencies is still high.


I'm sure demand is high, but we're only talking about 100kHz-wide
channels carrying between 2 and 4 radio stations per 100kHz.


> 118 upto 120 is for aeronautical beacons, doesn't seem to be something
> they want to change, I guess the 120 just looked more sensible that it
> actually is (30 and 120 are mathematically linked).


What about 108 - 118 MHz?


> Apart from current use, thing have to be regulated with
> administrations in roughly 30 countries or so.


Why should a country thousands of miles away from the UK care about a
few 100kHz DRM channels in the UK?


> Considering how hard
> it is already to reallocate within the same allocation (TV->DAB;
> Analog TV->DVB) I can hardly imagine that there will be new
> allocations within considerable time.


I'm starting to think you're a serious pessimist! ;-)


> This leaves my with 48-68 MHz aka TV band I. My best guess is that
> countries having these frequency allocated will keep them for TV as
> they allow for pretty cheap TV distribution (wide area coverage with
> relatively few sites/power).


TV?? Why TV? What's wrong with the 400 MHz or so in Bands IV & V?

And you've missed out 61-68 MHz.


--
Steve - www.digitalradiotech.co.uk - Digital Radio News & Info

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  • Re: What Spectrum is Available from 30 MHz to 120 MHz?
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