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More from OFCOM on PMSE clearing the 700MHz band...


Simon Lewis

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Erm, slightly confused (though I'm not a regular noise-boy so may have missed something)...

 

I understood the PMSE band to be in the 800MHz range - ie 823 to 832MHz, which is what we have on our licence as PMSE users...

So is there another PMSE band in 700MHz??

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You are thinking of the free to use part of the spectrum - Ch70.

 

As you probably know PMSE stands for Program Making and Special Events, who look after the whole spectrum.

 

Current availability can be seen on a lovely diagram from Shure - Here

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Tony,

 

The 800MHz band sell off was where we lost channels 61 to 69 (790 - 862 MHz) although we were "given" 823 to 832 back in 2014. Channel 38 was designated as the "new 69".

 

The 700MHz sell of will see us losing channels 49 to 60 (694 - 790 MHz) and STT services displaced by this have to go to channel 31 - 37 (so we effectively lose that space too).

 

The 700MHz sell off was going to be from 2022, but now they want it done more quickly...

 

We will be left with 21-30 (470 - 550MHz) and 39 - 48 (614 - 694 MHz) as interleaved spectrum, 823-832 MHz and channel 38 as dedicated shared spectrum and (part of ) channel 70 as a free to use (but somewhat busy).

 

Oh, there's 1.8GHz too :-)

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PMSE is for practical purposes split into two types - your 'normal' licence isn't the same as the one that's being re-allocated. These are bought as a series of one-offs. The broadcasters make frequent use of these, and they're allocated for shorter time periods for specific locations or smaller areas to provide OB type coverage. 700MHz users have a 'standard licence' - this is not the same as the UHF one man y of us have - If I log into my OFCOM account, I do not have the appropriate registration to book a 700MHz frequency. You have to apply to get this kind of licence - I guess the system works because it's a little like the PMR technically assigned comms licences, they are coordinated, to make best use fo the space. Broadcasters usually do not use ch 38 or the old 69/70 ones. Probably a sensible move because when they come to theatres, they never ask, but just turn on their kit!
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It's possible to get a co-ordinated licence for site specific long term use (~one year), but yes - the short term PMSE use is normally along the lines of 'we need 6 frequencies at this geographical location between these dates and our kit will tune to this range". The other key benefit is not only should there be no other users in your allocated slot, but that you are the only one authorised to use it....
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In short, then, those of us who moved to CH 38 in the last enforced move are safe (for now, I guess) as this new move won't affect that licensing...?

 

Yes....

 

But those of us who moved to Ch54 and surrounding area will have to do it all again. Sigh.

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But those of us who moved to Ch54 and surrounding area will have to do it all again. Sigh.

 

It's a pain... but at least there is the prospect of payment to ease the move. Of course, PMSE is being squeezed into yet smaller bits of spectrum, and sharing stuff with DTT so life isn't necessarily going to get easier....

 

 

 

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