[opendtv] Re: Pace 'turns the corner' and returns to profit
- From: "Dale Kelly" <dalekelly@xxxxxxxxxxx>
- To: <opendtv@xxxxxxxxxxxxx>
- Date: Mon, 12 Feb 2007 16:11:35 -0800
Bert wrote:
> What is "higher power"? I didn't see any numbers. Did I miss them?
> The DTT multiplexes from Crystal Palace now are 20 KW apiece.
> Apparently, even at 16-QAM, this is not enough to achieve the same
> coverage as the analog 1 MW.
> So if higher power means ~200 KW ERP when moving up to 64-QAM
The general rule of thumb is that DTV requires approximately -6db of the
analog channel for equal coverage. That would be about 250KW in this case.
So, your estimate is about right.
> -----Original Message-----
> From: opendtv-bounce@xxxxxxxxxxxxx
> [mailto:opendtv-bounce@xxxxxxxxxxxxx]On Behalf Of Manfredi, Albert E
> Sent: Monday, February 12, 2007 2:31 PM
> To: opendtv@xxxxxxxxxxxxx
> Subject: [opendtv] Re: Pace 'turns the corner' and returns to profit
>
>
> Craig Birkmaier wrote:
>
> > Not the same at all. Take a closer look at what they are calling
> > High Power levels. The truth is that they have a distributed
> > transmission infrastructure and will use SFNs to fill in the gaps.
>
> What is "higher power"? I didn't see any numbers. Did I miss them?
>
> The DTT multiplexes from Crystal Palace now are 20 KW apiece.
> Apparently, even at 16-QAM, this is not enough to achieve the same
> coverage as the analog 1 MW.
>
> So if higher power means ~200 KW ERP when moving up to 64-QAM, the next
> logical step up, that would put it on a par with many US UHF
> transmitters, and higher power than many in the US too.
>
> Perhaps they'll do something like Berlin. Their high power channels are
> on two closely spaced towers, one at 120 KW and another at 50 KW ERP.
> This is not quite what you're describing, but it is an SFN. Does not
> help distant coverage, though, compared to a 170 KW big stick.
>
> > Nobody is taking away the Freeview advantage - they are extending
> > it in much the same way that I have advocated for the U.S. market.
> >
> > What BSkyB is doing is leveraging the Freeview platform to deliver
> > additional paid TV programming. This is no different than the
> > TopUpTV tier that is available in the U.K. now.
>
> How is it different from USDTV?
>
> Bert
>
>
> ----------------------------------------------------------------------
> You can UNSUBSCRIBE from the OpenDTV list in two ways:
>
> - Using the UNSUBSCRIBE command in your user configuration
> settings at FreeLists.org
>
> - By sending a message to: opendtv-request@xxxxxxxxxxxxx with the
> word unsubscribe in the subject line.
>
>
----------------------------------------------------------------------
You can UNSUBSCRIBE from the OpenDTV list in two ways:
- Using the UNSUBSCRIBE command in your user configuration settings at
FreeLists.org
- By sending a message to: opendtv-request@xxxxxxxxxxxxx with the word
unsubscribe in the subject line.
Other related posts:
