[cma-l] Radio Link Transmission systems

Fri Jun 3 11:35:18 BST 2016

Does anyone know the Ofcom policy for using 24GHz? Ubiquiti have a range
that operate at that frequency. They would be ideal for IP Radio links if
you can actually see the transmitter with no obstruction.

Pete

On 3 June 2016 at 10:13, Alan Coote <alan.coote at 5digital.co.uk> wrote:

> Here's how The Bay (now Hot Radio) in Bournemouth was set up.
>
> We started with expensive business grade ADSL links at the studio and TX
> using professional low latency codecs( the same equipment the BBC uses on
> it’s Network Radio).
>
> We then added a couple of Draytec routers and utilised backup consumer
> grade ADSLs. Seeing an opportunity to save money, we then removed the
> expensive codecs and replaced them with Barix, but to increase the fidelity
> we dumped the business grade ADSL with a two hop 5.8Gb wireless LAN as
> there was not a direct line of site to the TX site.
>
> We used Draytek routers which allows a wireless dongle as a backup which
> got us out of trouble a couple of times.
>
> After the first year we ended up with double link redundancy at the TX,
> and triple from the studio.
>
> To be honest we initially we made a mistake by putting too much strain on
> our operational costs by leasing the business ADSLs and the professional
> codecs. Dumping them and buying Barix, Draytek, and the 5.8GHz WLAN saved
> us a stack of cash and meant we could afford to make the whole system
> significantly more reliable.
>
> Kind Regards
>
> Alan
>
>
>
> Alan Coote
>
> Email - alan.coote at MonogramMedia.co.uk <alan.coote at 5digital.co.uk>
>
> Phone - 0800 949 6655
>
> Mobile - 07801 518858
>
> Twitter - @TheAlanCoote <http://www.twitter.com/TheAlanCoote>
>
>
> Twitter - @LTBShow <http://www.twitter.com/TheAlanCoote>
>
> Web - http://www.LetsTalkBusinessOnline.com <http://www.5digital.co.uk/>
>
> From: <cma-l-bounces at mailman.commedia.org.uk> on behalf of "
> transplanfm at hotmail.com" <transplanfm at hotmail.com>
> Reply-To: "cma-l at mailman.commedia.org.uk" <cma-l at mailman.commedia.org.uk>
> Date: Thursday, 2 June 2016 at 20:04
> To: "cma-l at mailman.commedia.org.uk" <cma-l at mailman.commedia.org.uk>
> Subject: [cma-l] Radio Link Transmission systems
>
> That's fine - except it's using public networks are domestic-quality
> equipment with the many risk elements that entails.
> Hardly a professional broadcast solution.
> We would only install professional rack-mounted codecs using the latest
> minimum-latency software operating via fixed IP addresses linked to
> a known reliable ISP - if the wholly-owned option of if a radio link path
> using any of the 5 available platforms was physically impossible.
>
>
> Ian Hickling
>
> Partner
>
> <http://www.transplanuk.com/>
>
> *Office: 016 3557 8435  (07h to 22h GTS)*
>
> *Car: 075 3098 0115 (only responds when driving)*
>
> *6 Horn Street, Compton, NEWBURY, RG20 6QS*
>
>
> ------------------------------
>
>
>
> *From:* cma-l-bounces at mailman.commedia.org.uk [
> mailto:cma-l-bounces at mailman.commedia.org.uk
> <cma-l-bounces at mailman.commedia.org.uk>] *On Behalf Of *Alan Coote
> *Sent:* 02 June 2016 09:45
> *To:* cma-l at mailman.commedia.org.uk
> *Subject:* Re: [cma-l] Radio Link Transmission systems
>
>
>
> Using IP, you can easily stick in a router at the TX with automatic
> network fail-over. It will pick up your internet stream via a secondary
> ADSL and /or plug a 4G modem .
>
>
>
>
>
> Alan
>
>
>
> *Subject: *Re: [cma-l] Radio Link Transmission systems
>
>
>
> not only that but sometimes the studio location can be in a really non
> suitable position for a transmitter site, and so you have to be situated
> somewhere else.
>
>
> [image: NKPA Broadcast Ltd]
> *Nathan Silveston*
>
>
> *DirectorNKPA Broadcast Ltd (9817955)**M: 07900 494 398*
>
>
> ------------------------------
>
> *From:* cma-l-bounces at mailman.commedia.org.uk [
> cma-l-bounces at mailman.commedia.org.uk] on behalf of Neil Munday [
> neilm at susyradio.com]
> *Sent:* 01 June 2016 15:51
> *To:* The Community Media Association Discussion List
> *Subject:* Re: [cma-l] Radio Link Transmission systems
>
> Nick
>
>
>
> Stop hyping on about 5 km it's a radio wave! Besides some stations have
> special constructions which affect pattern from a perfect circle!
>
>
>
> Neil
>
> On Wednesday, 1 June 2016, Canalside's The Thread <office at thethread.org.uk>
> wrote:
>
> What’s fascinating on this one is that the distance I believe between the
> Transmitter site and the actual base signal is about two and half miles …..
> crikey !   that’s nearly as big as the actual broadcast area !
>
>
>
> May I remind everyone ….. 5km !     don’t exceed that or else Ofcom will
> reach for the panic button the Commercials will chuck all their Toys out of
> the Pram and you’ll be in danger of broadcasting to more than one man and
> his Dog and we can’t have that now can we ?? as it just wouldn’t be
> Cricket. Everyone else pleases themselves but we have to stick to the rules
> of the fair play award.
>
>
>
> Remember, our aka name is   <>   Restricted FM                    LOL
>     J
>
>
>
> A couple of yogurt cartons and a piece of string normally does the trick
> and keeps the signal strength to a whimper, and the cost is negligible as
> well       a fiver (£5) tops
>
> With reference to what Glynn has suggested, if the signal does stray by a
> few yards then you can always lob a few twigs in the way of it, that also
> usually does the trick.
>
> Listening to the state of ours in certain parts of Macc, I think someone
> has chucked a Tree in front of it.
>
>
>
> Nick H Dumpty
>
>
> ------------------------------
>
> *From:*cma-l-bounces at mailman.commedia.org.uk
> <https://UrlBlockedError.aspx> [mailto:
> cma-l-bounces at mailman.commedia.org.uk <https://UrlBlockedError.aspx>] *On
> Behalf Of *Associated Broadcast Consultants
> *Sent:* 01 June 2016 13:33
> *To:* The Community Media Association Discussion List
> *Cc:* cma-l
> *Subject:* Re: [cma-l] Radio Link Transmission systems
>
>
>
> I agree with Bill - if you have perfect line of sight (not even a twig in
> the way) then a digital 5.8GHz link is the way to go.   It gives you ample
> bandwidth to deliver perfect uncompressed PCM (ie CD quality) audio - no
> need for mp3, aac etc compression.
>
>
>
> Rather than the free spectrum though, I'd go for licenced spectrum - for
> £50 a year fee it should be cleaner spectrum less susceptible to
> interference.
>
>
>
> A few more details available on our website 'ere
> <http://a-bc.co.uk/studio-transmitter-links-stl/>.
>
>
>
> --
>
> Glyn Roylance - Principal Consultant
>
> Associated Broadcast Consultants <http://www.a-bc.co.uk/>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
> On 1 June 2016 at 12:06, Jonathan Pinfield <
> jonathan.pinfield at bcbradio.co.uk <https://UrlBlockedError.aspx>> wrote:
>
> Hi all
>
>
>
> We’re looking for cheap and reliable solutions to get our “on-air” output
> from our studios in Bradford city centre to our transmitter site a couple
> of miles away. We’ve got line of site from the top of our building to the
> transmitter site.
>
>
>
> Please let us know cost effective & practical solutions that work for you.
>
>
>
> Thanks
>
>
>
> Jonathan Pinfield
>
> Broadcast Manager – BCB 106.6fm
>
>
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-- 
Peter Symonds
Broadcast Engineer and Radio Tech Geek
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