[cma-l] Radio Link Transmission systems

Fri Jun 3 08:50:19 BST 2016

Thanks Nathan - beat me to it.Even in these rampantly digital days it is still preferable to listen off air in real time to avoid the situation where something in the chain has gone wrong - and listening to desk output gives no indication of the problem.Does anyone still have a profanity delay?
Not at this level on our 18-year experience.
Ian HicklingPartnerOffice: 016 3557 8435  (07h to 22h GTS)Car: 075 3098 0115 (only responds when driving)6 Horn Street, Compton, NEWBURY, RG20 6QS

From: nathan at nkpa.co.uk
To: cma-l at mailman.commedia.org.uk
Date: Thu, 2 Jun 2016 21:25:56 +0000
Subject: Re: [cma-l] Radio Link Transmission systems

The only real drawback with ip linking is the latency if you wish to listen off air in the studio. Even the most efficient of codecs the delay is too much.

This means you either have to listen to desk output(not great) or have to have a low delay processor in the studio. 

Sent from my iPhone

On 2 Jun 2016, at 21:37, Two Lochs Radio <tlr at gairloch.co.uk> wrote:

That's a desirable approach certainly if funds permit, Ian, but I don't think latency is usually a big deal for a one-way link is it?

Obviously for two-way links, interviews etc latency can be a big problem, but for an STL what does it matter if the transmission is slightly delayed? After all, DAB services can have seconds of latency, even with all the fancy gear the BBC can throw in,
 plus some in the receiver, as does any satellite-based service. And of course big talk stations deliberately go through a 5-10s delay so they can dump any 'inappropriate language'!

Alex

On 02 June 2016 at 20:04 Ian Hickling <transplanfm at hotmail.com> wrote:

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.

-- 

Glyn Roylance - Principal Consultant

Associated Broadcast Consultants

On 1 June 2016 at 12:06, Jonathan Pinfield <jonathan.pinfield at bcbradio.co.uk> 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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