[cma-l] Radio Link Transmission systems

Fri Jun 3 11:13:01 BST 2016

Yes Alex it is a very common requirement/demand of "experienced" presenters
- they are used to hearing their voice in the headphones processed.
Especially when talking over a music bed it helps them judge the levels
better - an unprocessed monitor would be likely to make them drop the fader
too much.  Even a fractional delay creates a weird "empty head" kind of
feeling for the presenter because of the phase difference between their
actual voice and the monitored voice in their headphones.   Trying to do it
with longer delays like those introduced by Barix encoders/decoders
(probably around 300ms) is virtually impossible without stumbling!

Many stations avoid the issue by using an old analogue (zero delay)
processor in the studio for monitoring purposes and keeping the presenters
happy.

I've never come across an amateur/CR presenter require off-air or processed
monitoring though.

I agree with Ian it's also it's good practice to have someone monitoring
off-air.  If not the presenter, then hopefully someone in reception or
back-office.

Glyn

On 2 June 2016 at 23:15, Two Lochs Radio <tlr at gairloch.co.uk> wrote:

> Does anybody routinely listen off-air in the studio? I have never come
> across any station that does that. It's good to monitor it of course,
> typically a radio in the kitchen or reception permanently playing, and it
> should be an option for the studio to check output, but am I alone in
> thinking it unusual to listen off-air as a matter of routine in the studio?
>
> Alex
>
> On 02 June 2016 at 22:25 Nathan Silveston <nathan at nkpa.co.uk> wrote:
>
> 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
>
> <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*
>
>
> * 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
> <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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-- 
Glyn Roylance - Principal Consultant
Associated Broadcast Consultants <http://www.a-bc.co.uk/>
<http://www.a-bc.co.uk/index.html>
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