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#31
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Tim Keating wrote:
On Sat, 02 Apr 2005 18:06:59 GMT, Bob Miller wrote: From Digital Spy forum http://forum.digitalspy.co.uk/board/...d.php?t=205206 MRDAB writes... "Yeah I got my power arc aerial from there. it needs 2 batteries once in a blue moon (use some good duracells) it lives ontop of my wardrobe and is very happily picking up all muxes. I'm abt 30 miles from sutton coldfield" Snip... The original AV forum poster doesn't mention in which direction he located from Sutton Coldfield; as there are several repeaters deployed in and around the SC area. (Many of them well within a 30 mile radius, I.E. The AV forum poster could be right next to a repeater, but our resident COFDM Troll would never tell you about that tidbit of info). I assume he knows wherefrom he gets his signal. He could easily be in a direction from Sutton Coldfield that has no repeater. Here is a map of transmitter sites. http://www.wolfbane.com/articles/ukdmap2.htm And even if he is closer to a repeater than a main site the power level of the repeater may be so low as that the main transmitter site is where he still gets his signal. For example on this map of the UK Brierley Hill is the nearest repeater to Sutton Coldfield about 15 miles WSW and its six stations have power levels of 200, 100, and 80 Watts compared to Sutton Coldfields power of 8 kW (5 transmitters) and 10 kW (one transmitter). P.S.. Why so many repeaters(~8) all within 30 miles of SC?? Must be COFDM reception isn't all that good. The power of COFDM lays in its use of multipath instead of avoidance of it and its flexibility that ALLOWS the use of repeaters ON CHANNEL. A feature not a negative. Something that 8-VSB would like to have and sometimes it is suggested that someday if 8-VSB keeps improving it may be able to do what COFDM did out of the box many years ago, SFNs and ON CHANNEL repeaters. There is a wide coverage area in which MRDAB can live where he would be closer to Brierly and still have reception from Sutton Coldfield since Sutton has between 40, 80 and 100 times the power ERP that Brierley has. And as far as I can tell by the map there are only three such repeaters within 30 miles of Sutton and they are all in the direction of and around the other side of Birmingham. He could easily live to the South East and his closest transmitter site would be Sutton regardless of power levels. Another Item. Since when do UK residents measure their distances in Miles?? Awfully odd for a member who just signed up in March 2005.. Another BM plant? I think the UK has been measuring their speed and distance in Miles since the 16th Century when QE the 1st set the mile at 5280 ft. Their speedometers and speed limit signs are in miles. It seems the BM plant is smart enough to know this. One last item, the UK doesn't have any HDTV broadcasts. But that didn't stop Booby from polluting the HDTV usenet group with his meanderings. The UK has one and will have three satellite HD ventures. They are looking into doing terrestrial HD also. Bob Miller |
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#32
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Bob,
I was again accused of being 'you' over at AVS Forum because I asked what is the difference between the front end of a 8-VSB tuner and the front end of a COFDM tuner. You keep saying it is cheaper to make a COFDM tuner, but with 8-VSB receiver chips priced so low ($8.), how can that be? A COFDM HDTV receiver will need a scaler and the same up-front components as a 8-VSB receiver,...right? Also you seem to be comparing the cost of USA 1080i/720p capable receivers with UK's meager 600 line capable receivers. Isn't some of the price difference due to the fact that one is high definition and the other is not? IB (not Bob Miller - laughs!) |
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#33
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PS Current UK COFDM receiver don't need scalers at all because they
only have one 600 line TV standard to deal with,...right? Don't they have just one audio standard as well? So, aren't you comparing apples and oranges? IB |
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#34
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On Sun, 3 Apr 2005, Jeff Rife wrote:
Bob keeps spouting the myth about "broadcasters depending on must-carry", when the reality is that only a very few stations in most markets ever invoke "must carry" on DBS or cable. Any ABC, CBS, NBC, Fox, WB, or PBS station has no problem getting their signal carried without "must carry". Only low-value stations seem to have this problem. For those stations (home shopping channel repeaters, etc.), I have to admit that I agree with Bob that "must carry" is the only thing keeping them going. The sad thing is that "must carry" was not intended to benefit home shopping channel repeaters. Rather, it was intended to benefit such stations as UHF foreign-language channel that served the immigrant community; a channel which is of *great* value to a minority that would otherwise be neglected. It seems to me that "must carry" rules need to be revisited. -- Mark -- http://staff.washington.edu/mrc Science does not emerge from voting, party politics, or public debate. Si vis pacem, para bellum. |
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#35
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On Sun, 03 Apr 2005 14:51:31 -0400, Tim Keating
wrote: On Sat, 02 Apr 2005 18:06:59 GMT, Bob Miller wrote: From Digital Spy forum http://forum.digitalspy.co.uk/board/...d.php?t=205206 MRDAB writes... "Yeah I got my power arc aerial from there. it needs 2 batteries once in a blue moon (use some good duracells) it lives ontop of my wardrobe and is very happily picking up all muxes. I'm abt 30 miles from sutton coldfield" Snip... The original AV forum poster doesn't mention in which direction he located from Sutton Coldfield; as there are several repeaters deployed in and around the SC area. (Many of them well within a 30 mile radius, I.E. The AV forum poster could be right next to a repeater, but our resident COFDM Troll would never tell you about that tidbit of info). P.S.. Why so many repeaters(~8) all within 30 miles of SC?? Must be COFDM reception isn't all that good. Another Item. Since when do UK residents measure their distances in Miles?? Awfully odd for a member who just signed up in March 2005.. ^^^^^^^^^^^ this info is incorrect.. sorry.. The member Bob quoted "Gazza487" who signed up in Jul 2004.. One last item, the UK doesn't have any HDTV broadcasts. But that didn't stop Booby from polluting the HDTV usenet group with his meanderings. |
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#36
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On Sun, 03 Apr 2005 19:41:25 GMT, Bob Miller
wrote: Tim Keating wrote: On Sat, 02 Apr 2005 18:06:59 GMT, Bob Miller wrote: From Digital Spy forum http://forum.digitalspy.co.uk/board/...d.php?t=205206 MRDAB writes... "Yeah I got my power arc aerial from there. it needs 2 batteries once in a blue moon (use some good duracells) it lives ontop of my wardrobe and is very happily picking up all muxes. I'm abt 30 miles from sutton coldfield" Snip... The original AV forum poster doesn't mention in which direction he located from Sutton Coldfield; as there are several repeaters deployed in and around the SC area. (Many of them well within a 30 mile radius, I.E. The AV forum poster could be right next to a repeater, but our resident COFDM Troll would never tell you about that tidbit of info). I assume he knows wherefrom he gets his signal. He could easily be in a direction from Sutton Coldfield that has no repeater. Here is a map of transmitter sites. http://www.wolfbane.com/articles/ukdmap2.htm Judging by my recent research in thed SC area.. I would say the map quoted by your link is incomplete. (I.E. It's missing several transmission towers). |
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#37
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On Sun, 03 Apr 2005 16:16:16 -0400, Tim Keating
wrote: On Sun, 03 Apr 2005 14:51:31 -0400, Tim Keating wrote: On Sat, 02 Apr 2005 18:06:59 GMT, Bob Miller wrote: From Digital Spy forum http://forum.digitalspy.co.uk/board/...d.php?t=205206 MRDAB writes... "Yeah I got my power arc aerial from there. it needs 2 batteries once in a blue moon (use some good duracells) it lives ontop of my wardrobe and is very happily picking up all muxes. I'm abt 30 miles from sutton coldfield" Snip... The original AV forum poster doesn't mention in which direction he located from Sutton Coldfield; as there are several repeaters deployed in and around the SC area. (Many of them well within a 30 mile radius, I.E. The AV forum poster could be right next to a repeater, but our resident COFDM Troll would never tell you about that tidbit of info). P.S.. Why so many repeaters(~8) all within 30 miles of SC?? Must be COFDM reception isn't all that good. Here is a partial MAP of DTV retransmission towers within 62 miles of Sutton Coldfield.. Note: Each tower transmits roughly the same programming. http://www.kswindells.34sp.com/freev...meNGR=SK113003 Another Item. Since when do UK residents measure their distances in Miles?? Awfully odd for a member who just signed up in March 2005.. ^^^^^^^^^^^ this info is incorrect.. sorry.. The member Bob quoted "Gazza487" who signed up in Jul 2004.. One last item, the UK doesn't have any HDTV broadcasts. But that didn't stop Booby from polluting the HDTV usenet group with his meanderings. |
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#38
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#39
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On Sun, 03 Apr 2005 19:41:25 GMT, Bob Miller
wrote: Tim Keating wrote: On Sat, 02 Apr 2005 18:06:59 GMT, Bob Miller wrote: From Digital Spy forum http://forum.digitalspy.co.uk/board/...d.php?t=205206 MRDAB writes... "Yeah I got my power arc aerial from there. it needs 2 batteries once in a blue moon (use some good duracells) it lives ontop of my wardrobe and is very happily picking up all muxes. I'm abt 30 miles from sutton coldfield" Snip... The original AV forum poster doesn't mention in which direction he located from Sutton Coldfield; as there are several repeaters deployed in and around the SC area. (Many of them well within a 30 mile radius, I.E. The AV forum poster could be right next to a repeater, but our resident COFDM Troll would never tell you about that tidbit of info). I assume he knows wherefrom he gets his signal. He could easily be in a direction from Sutton Coldfield that has no repeater. Here is a map of transmitter sites. http://www.wolfbane.com/articles/ukdmap2.htm Judging by my recent research in thed SC area.. I would say the map quoted by your link is incomplete. (I.E. It's missing several transmission towers). Here is a partial MAP of DTV retransmission towers within 56 miles of Sutton Coldfield.. Note: Each tower transmits roughly the same programming. http://www.kswindells.34sp.com/freev...meNGR=SK113003 |
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#40
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Tim Keating wrote:
On Sun, 03 Apr 2005 19:41:25 GMT, Bob Miller wrote: Tim Keating wrote: On Sat, 02 Apr 2005 18:06:59 GMT, Bob Miller wrote: From Digital Spy forum http://forum.digitalspy.co.uk/board/...d.php?t=205206 MRDAB writes... "Yeah I got my power arc aerial from there. it needs 2 batteries once in a blue moon (use some good duracells) it lives ontop of my wardrobe and is very happily picking up all muxes. I'm abt 30 miles from sutton coldfield" Snip... The original AV forum poster doesn't mention in which direction he located from Sutton Coldfield; as there are several repeaters deployed in and around the SC area. (Many of them well within a 30 mile radius, I.E. The AV forum poster could be right next to a repeater, but our resident COFDM Troll would never tell you about that tidbit of info). I assume he knows wherefrom he gets his signal. He could easily be in a direction from Sutton Coldfield that has no repeater. Here is a map of transmitter sites. http://www.wolfbane.com/articles/ukdmap2.htm Judging by my recent research in thed SC area.. I would say the map quoted by your link is incomplete. (I.E. It's missing several transmission towers). Here is a partial MAP of DTV retransmission towers within 56 miles of Sutton Coldfield.. Note: Each tower transmits roughly the same programming. http://www.kswindells.34sp.com/freev...meNGR=SK113003 Well according to your map I was wrong. I thought there was three repeaters within 30 miles of Sutton Coldfield but there are only two. In your post above you say there are "Many of them well within a 30 mile radius". The only two I can see on your map are Brierley Hill: 24.6 km : 233' and Bromsgrove: 31.9 km : 211', both to the South West. Bromsgrove is operating at 50 Watts (2 channels) and 25 Watts (4 channels) which makes Sutton Coldfields lowest powered transmitter 160 to 320 times as powerful as the transmitters at Bromsgrove. All of these stations at high UHF that normally need more power; 34, 41 and 68. Bromsgrove, Channel 34 at 25 and 50 Watts Brierley Hill, Channel 68 at 200, 100 and 80 Watts Sutton Coldfield, Channel 41 at 8 kW and 10 kW A typical US Transmitter on such UHF channels would operate at #41 KKPX CA SAN JOSE 1000 kW #41 WZVN-TV FL NAPLES 1000 kW #41 WXYZ-TV MI DETROIT 700 kW #68 KRCA CA RIVERSIDE 1000 kW (the only station on 68 - no one likes these real high UHF power bills) #34 KWGN-TV CO DENVER 1000 kW (when they finally let them build a tower) #34 WUSA DC WASHINGTON 1000 kW #34 WDAF-TV MO KANSAS CITY 1000 kW Again Sutton Coldfield operates at flea power compared to even what in the US would be called low power and these repeater sites operate at NANO power. And our friend gets good reception of all muxes (stations) at 30 miles. He probably lives to the South East where on your map there are no repeaters at all. http://www.kswindells.34sp.com/freev...t=Show+Terrain And in New York City last week using a receiver with a 5th gen LG chip in it that has benefited from 8 to 10 years of development, we could not receive WCBS broadcasting from the Empire State Building at 34 the St. in an apartment on West 72nd St. about 40 some blocks away. #56 WCBS-TV NY NEW YORK 349 kW This CBS station is operating at 35 times the power of the highest powered transmitter and 43 times the lowest powered transmitter at Sutton Coldfield and can't be received at 40 blocks (or even 9 blocks) while Sutton can easily be received with a simple omni (arc) antenna in someones bedroom on the top of his wardrobe at 30 miles. It would seem that the story that COFDM needs hundreds of times the power that 8-VSB needs is backwards. In fact I don't think you would be able to receive CBS on 72nd St. with the state of the art 5th gen receiver even if the 8-VSB power was so high that the antenna was melting. Bob Miller |
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