[cma-l] Radio Link Transmission systems

Fri Jun 3 10:46:16 BST 2016

We're fortunate to have studio premises at the same location as our 
transmitter, so no problem.

However, we also have a remote studio for some programmes. We use a 5.8g 
link, which is also used as a data link, so we can control our main 
studio remotely. Brilliant. We also use a remote facility for OBs using 3G.

We do have some latency, which does vary, but it's not a problem. We 
listen to desk output during speech, flicking to the off air receiver 
during music for a constant check. We can automate this, so that desk 
output goes to headphones when a mic opens!

Phil Dawson
*FANTASY RADIO 97FM**
**DEVIZES,**
**Wiltshire**
*

On 03/06/2016 10:16, cma-l-request at mailman.commedia.org.uk wrote:
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>     1. Re:  Radio Link Transmission systems (Alan Coote)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Fri, 03 Jun 2016 10:13:54 +0100
> From: Alan Coote <alan.coote at 5digital.co.uk>
> To: "cma-l at mailman.commedia.org.uk" <cma-l at mailman.commedia.org.uk>
> Subject: Re: [cma-l] Radio Link Transmission systems
> Message-ID: <E8F20AAD-4C83-4FBD-BCB3-0F0231079E6D at 5digital.co.uk>
> Content-Type: text/plain; charset="utf-8"
>
> 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
>
> Phone - 0800 949 6655
>
> Mobile - 07801 518858
>
> Twitter - @TheAlanCoote
>
>
>
> Twitter - @LTBShow
>
> Web - http://www.LetsTalkBusinessOnline.com
>
>
> 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
>
> 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] 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.
>
>   
>
>
> Nathan Silveston
> Director
> NKPA 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 [mailto:cma-l-bounces at mailman.commedia.org.uk] 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.
>
>   
>

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