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DAB for Cars?
Oh dear! DAB doesn't seem to get much support among the motoring classes
either.... http://www.autoexpress.co.uk/car-new...rce=newsletter Go all the way down to the Discussion. |
DAB for Cars?
"UK Traveller" wrote in message ... Oh dear! DAB doesn't seem to get much support among the motoring classes either.... http://www.autoexpress.co.uk/car-new...rce=newsletter Go all the way down to the Discussion. My new Volvo has DAB and FM. I used both on a trip from Edinburgh to Suffolk - no real difference but DAB gave me extra stations like BBC Radio 7. Indoors, I still need FM as Radio 3 on DAB is poor compared to FM. |
DAB for Cars?
UK Traveller wrote... DAB doesn't seem to get much support among the motoring classes either.... Clods who post about radio in a TV group are not flavour of the month either. Go all the way down to the Discussion. If you can't even be arsed to attempt to start a discussion on the topic you posted a link to, why should we bother to follow it? -- UnsteadyKen |
DAB for Cars?
"Geoff Pearson" wrote in message
... My new Volvo has DAB and FM. I used both on a trip from Edinburgh to Suffolk - no real difference but DAB gave me extra stations like BBC Radio 7. Indoors, I still need FM as Radio 3 on DAB is poor compared to FM. How well does DAB on the move adjust to changing from one transmitter to another as you move around the country? Can you hear an audible glitch or is it a seamless transition? I remember some early FM radios with RDS used to mute for a fraction of a second as they switched from one signal to another but more recent ones seem to be immune to any momentary switchover glitch. I imagine that if DAB is transmitted in labelled packets of data which use the same ID numbering across all transmitters then it should be seamless providing the radio buffers a few packets between receipt and playout: it can switch over from packet 123 from transmitter A to packet 124 from transmitter B, though it could equally well switch over a few packets early or later of that, because packet n from one transmitter should be identical data to packet n from all other transmitters. As a matter of interest, should DAB be immune to stray interference from PCs and other similar equipment in the home? My mother's DAB radio seems to work flawlessly until she switches on her PC (*) which is next to it, when reception becomes much more sensitive to people walking near the PC and to the precise location of the radio. And, yes, I've confirmed that it is the switching on of the PC rather than its monitor which is causing it! (*) A desktop in an earthed metal case, not a laptop in an unearthed plastic case. |
DAB for Cars?
NY wrote:
"Geoff Pearson" wrote in message ... My new Volvo has DAB and FM. I used both on a trip from Edinburgh to Suffolk - no real difference but DAB gave me extra stations like BBC Radio 7. Indoors, I still need FM as Radio 3 on DAB is poor compared to FM. How well does DAB on the move adjust to changing from one transmitter to another as you move around the country? Can you hear an audible glitch or is it a seamless transition? Seamless, all DAB transmitters for a given mux operate as an SFN (Single Frequency Network)* so there is no freq hopping (as you get with FM-RDS) That's why DAB is largely immune to multipath, it actually thrives on it, so in a given location you could well be receiving the signal from several transmissions and/or reflected signals from different directions As a matter of interest, should DAB be immune to stray interference from PCs and other similar equipment in the home? My mother's DAB radio seems to work flawlessly until she switches on her PC (*) which is next to it, when reception becomes much more sensitive to people walking near the PC and to the precise location of the radio. And, yes, I've confirmed that it is the switching on of the PC rather than its monitor which is causing it! Yes, it's still an RF carrier you're trying to receive, so it can be destroyed by the sort of RF gunk that emanates from PCs etc * One exception, the Digital One commercial national mux, one freq in Eng/Wales/NI (11D) and another for Scotland (12A) been like that since launch 18 years ago, foresight perhaps !! http://www.wohnort.org/DAB/uknat.html -- Mark Please replace invalid and invalid with gmx and net to reply. |
DAB for Cars?
"UnsteadyKen" wrote in message ...
UK Traveller wrote... DAB doesn't seem to get much support among the motoring classes either.... Clods who post about radio in a TV group are not flavour of the month either. [snip] Actually it is relevant Ken as the technology used to transmit DAB is identical to that used for DTTV except it has fewer carriers and consequential lower data rate. -- Woody harrogate three at ntlworld dot com |
DAB for Cars?
"Mark Carver" wrote in message
... NY wrote: How well does DAB on the move adjust to changing from one transmitter to another as you move around the country? Can you hear an audible glitch or is it a seamless transition? Seamless, all DAB transmitters for a given mux operate as an SFN (Single Frequency Network)* so there is no freq hopping (as you get with FM-RDS) Ah, I didn't know that the muxes were each transmitted as an SFN. Problem solved, then! As a matter of interest, should DAB be immune to stray interference from PCs and other similar equipment in the home? Yes, it's still an RF carrier you're trying to receive, so it can be destroyed by the sort of RF gunk that emanates from PCs etc But is it likely that a DAB radio would be more or less susceptible than an FM radio? http://en.wikipedia.org/wiki/Digital...United_Kingdom says that DAB in the UK uses frequencies of around 200 MHz, roughly twice that of FM. Is 200 MHz more or less likely to suffer interference from a PC than 100 MHz, for CPU clock speeds of a few GHz? Obviously there's the type of modulation and error-correction to be considered as well! |
DAB for Cars?
On Tue, 17 Dec 2013 17:46:07 -0000, Woody wrote:
This is a multi-part message in MIME format. Can you get a ****ing clue? |
DAB for Cars?
NY wrote:
http://en.wikipedia.org/wiki/Digital...United_Kingdom says that DAB in the UK uses frequencies of around 200 MHz, roughly twice that of FM. Is 200 MHz more or less likely to suffer interference from a PC than 100 MHz, for CPU clock speeds of a few GHz? Obviously there's the type of modulation and error-correction to be considered as well! All I can say is that the emissions from the LCD screens I use are about 15dB stronger on the FM band than on the DAB band. Bill |
DAB for Cars?
"UnsteadyKen" wrote in message
... UK Traveller wrote... DAB doesn't seem to get much support among the motoring classes either.... Clods who post about radio in a TV group are not flavour of the month either. DAB is a TV system too, they've been doing it since 2006: http://www.theregister.co.uk/2006/09..._broadcast_tv/ Also, DAB uses TV channels, namely the 7 MHz channels of the long established European System B, divided into quarters. So BBC National DAB Block 12B for example, is actually the second quarter of TV Channel E12. |
DAB for Cars?
I don't have to, just listen to a minicab driver trying to listen to
TalkSport on it in Kingston Upon Thames where it seems to vary between very good to bubbling gurgling and nothing at all at random. Brian -- Brian Gaff....Note, this account does not accept Bcc: email. graphics are great, but the blind can't hear them Email: __________________________________________________ __________________________________________________ __________ "UK Traveller" wrote in message ... Oh dear! DAB doesn't seem to get much support among the motoring classes either.... http://www.autoexpress.co.uk/car-new...rce=newsletter Go all the way down to the Discussion. |
DAB for Cars?
Correct of course but its far more complicated, I believe the Germans have
some dab in UHf. Brian -- Brian Gaff....Note, this account does not accept Bcc: email. graphics are great, but the blind can't hear them Email: __________________________________________________ __________________________________________________ __________ "Stephen" wrote in message ... "UnsteadyKen" wrote in message ... UK Traveller wrote... DAB doesn't seem to get much support among the motoring classes either.... Clods who post about radio in a TV group are not flavour of the month either. DAB is a TV system too, they've been doing it since 2006: http://www.theregister.co.uk/2006/09..._broadcast_tv/ Also, DAB uses TV channels, namely the 7 MHz channels of the long established European System B, divided into quarters. So BBC National DAB Block 12B for example, is actually the second quarter of TV Channel E12. |
DAB for Cars?
In article ,
Brian Gaff wrote: I don't have to, just listen to a minicab driver trying to listen to TalkSport on it in Kingston Upon Thames where it seems to vary between very good to bubbling gurgling and nothing at all at random. DAB requires a decent aerial in a car. Those window ones which come with some are useless. Snag is a decent aerial can cost as much as the radio. I've no experience of factory fit ones. -- *Never miss a good chance to shut up * Dave Plowman London SW To e-mail, change noise into sound. |
DAB for Cars?
Dave Plowman (News) wrote:
DAB requires a decent aerial in a car. Those window ones which come with some are useless. Snag is a decent aerial can cost as much as the radio. I've no experience of factory fit ones. I've made several DAB car aerials for me and Paul. I use a cheap car aerial mount from CPC and fit a bit of steel wire cut to length. I have almost unlimited supplies of the single strand stainless wires that were intended to make up the ropes for the Severn Bridge. The aerials work very well, except that they pick up a lot of Welsh stations. Bill |
DAB for Cars?
On 18/12/2013 11:18, Brian Gaff wrote:
Correct of course but its far more complicated, I believe the Germans have some dab in UHf. No, just Band III, they might have dabbled about with L Band (1.4GHz) in the past, some early DAB receivers were equipped for it, and there were tests here and in France. Canada had a service on L Band but tat ceased in 2011 -- Mark Please replace invalid and invalid with gmx and net to reply. |
DAB for Cars?
"Bill Wright" wrote in message
... Dave Plowman (News) wrote: DAB requires a decent aerial in a car. Those window ones which come with some are useless. Snag is a decent aerial can cost as much as the radio. I've no experience of factory fit ones. I've made several DAB car aerials for me and Paul. I use a cheap car aerial mount from CPC and fit a bit of steel wire cut to length. I have almost unlimited supplies of the single strand stainless wires that were intended to make up the ropes for the Severn Bridge. The aerials work very well, except that they pick up a lot of Welsh stations. You must have used wires from the Welsh side of the bridge instead of the English side! |
DAB for Cars?
In article , Mark Carver
scribeth thus On 18/12/2013 11:18, Brian Gaff wrote: Correct of course but its far more complicated, I believe the Germans have some dab in UHf. No, just Band III, they might have dabbled about with L Band (1.4GHz) in the past, some early DAB receivers were equipped for it, and there were tests here and in France. Canada had a service on L Band but tat ceased in 2011 As well it might .. better frequencies for mobile phone use than broadcast... -- Tony Sayer |
DAB for Cars?
On 18/12/2013 12:18, tony sayer wrote:
In article , Mark Carver No, just Band III, they might have dabbled about with L Band (1.4GHz) in the past, some early DAB receivers were equipped for it, and there were tests here and in France. Canada had a service on L Band but tat ceased in 2011 As well it might .. better frequencies for mobile phone use than broadcast... Yes, possibly, though I walked around Paris about ten years ago listening to their L Band DAB, and it was as good/bad as the Band III reception, (but the Eiffel tower Tx was rarely out of sight !) -- Mark Please replace invalid and invalid with gmx and net to reply. |
DAB for Cars?
In article ,
Bill Wright wrote: DAB requires a decent aerial in a car. Those window ones which come with some are useless. Snag is a decent aerial can cost as much as the radio. I've no experience of factory fit ones. I've made several DAB car aerials for me and Paul. I use a cheap car aerial mount from CPC and fit a bit of steel wire cut to length. I have almost unlimited supplies of the single strand stainless wires that were intended to make up the ropes for the Severn Bridge. The one I've got is active. Actually got two amps. The DAB one is line powered - the other a separate +12v feed. And of course two downleads - one for DAB, one for everything else. It does work very well though on everything. FM reception is much better than on the factory setup with rear window aerial on my other car too. -- *Would a fly without wings be called a walk? Dave Plowman London SW To e-mail, change noise into sound. |
DAB for Cars?
On Wed, 18 Dec 2013 11:24:35 +0000 (GMT), "Dave Plowman (News)"
wrote: In article , Brian Gaff wrote: I don't have to, just listen to a minicab driver trying to listen to TalkSport on it in Kingston Upon Thames where it seems to vary between very good to bubbling gurgling and nothing at all at random. DAB requires a decent aerial in a car. Those window ones which come with some are useless. Snag is a decent aerial can cost as much as the radio. I've no experience of factory fit ones. My 59 reg Focus came with a Sony DAB radio fitted. Works well 99% of the time. Occasional drop-outs when in some parts of Kent - the A249 between the M20 and the M2 in particular. -- Pete |
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