Global Network DTV Transition Status (closed) - Page 6 - Canadian TV, Computing and Home Theatre Forums

 
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post #76 of 447 (permalink) Old 2010-10-20, 03:34 PM
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Did I read that correctly? 410 watts in Halifax?! Wow....

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post #77 of 447 (permalink) Old 2010-10-20, 10:17 PM
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Did I read that correctly? 410 watts in Halifax?! Wow....
You did. I did a double take too when I read the CRTC web page today.

I visited Halifax last spring, and judging from the lay of the land, that ain't going to go far....

Might as well hook it into a dummy load....

These requests and decisions simply defy logic from my perspective.

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post #78 of 447 (permalink) Old 2010-10-21, 03:23 PM
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The low power allotments are all on VHF frequencies due to problems caused by co-channel assignments and tropo skip at those frequencies. IMHO, VHF should be turned over to other uses, like they did in some European countries. But then, I doubt they are as valuable to communications companies as the high UHF frequencies that were reassigned. Dropping VHF frequencies, instead of UHF frequencies, would be a lot better for broadcasters and consumers. As it is, consumers must deal with the cost and logistics of installing huge VHF antennas to pick up low powered VHF stations.

CIII in Paris is a problem at 100,000w. It's going to be almost useless at 4,000w. I see they now have transitional approval on channel 6 at a different antenna height. I'm guessing they are going to do some off-hours testing before they cut over full time. IMHO, it would be a lot better for everyone if they used a higher powered UHF channel, instead of 6, for post transitional broadcasting.

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post #79 of 447 (permalink) Old 2010-10-21, 04:00 PM
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I understand the "logic" behind low ERP on VHF stations. I've followed the DTV transition in the US and what a disaster low ERP VHF was down there. Being so isolated, Halifax won't likely have many issues with co-channel interference, even during tropo. Nonetheless, such a low ERP will make the station a challenge at best outside of the city.

It wouldn't surprise me if there's a conspiracy going on here by the stations.

What's the best way to turn off viewers from antenna television? Make the ERP low on VHF, therefore viewers have difficulty getting the signal. And other things as well, such as a defective programming guide, etc.

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post #80 of 447 (permalink) Old 2010-10-31, 10:44 AM
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Many full powered analog stations in the US in the 7-13 range were 316kW ERP. Today in digital many are 30-40kW ERP. So, that 400W transmitter IS a joke. Maybe a 10 mile reliable coverage range.
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post #81 of 447 (permalink) Old 2010-10-31, 11:05 AM
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Many full powered analog stations in the US in the 7-13 range were 316kW ERP. Today in digital many are 30-40kW ERP. So, that 400W transmitter IS a joke. Maybe a 10 mile reliable coverage range.
To me it sounds like IC hasn't learned anything from the experience in the US.
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post #82 of 447 (permalink) Old 2010-10-31, 12:07 PM
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I think they use the 10% rule. Digital ERP is 10 percent of the original analog ERP.
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post #83 of 447 (permalink) Old 2010-11-01, 11:02 AM
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I think they use the 10% rule. Digital ERP is 10 percent of the original analog ERP.
No, it is more complicated than that. They find an ERP that will produce similar Digital Urban and Noise-Limited Bounding Contours as the Grade A and B analog contours. The problem is the models they use were only tested on UHF and they didn't verify that they also work in VHF.

holl_ands gave an excellent explanation of this issue with a lot more details in the OTA ERP Levels (Analogue vs. DTV) - why so different? thread.
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post #84 of 447 (permalink) Old 2010-11-05, 05:33 PM
 
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post #85 of 447 (permalink) Old 2010-11-06, 03:05 PM
 
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post #86 of 447 (permalink) Old 2010-11-07, 02:55 PM
 
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post #87 of 447 (permalink) Old 2010-11-07, 02:56 PM
 
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post #88 of 447 (permalink) Old 2010-11-07, 02:57 PM
 
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post #89 of 447 (permalink) Old 2010-11-07, 02:58 PM
 
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post #90 of 447 (permalink) Old 2010-11-07, 02:59 PM
 
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