[opendtv] Re: Doug is Missing the Point
- From: Doug McDonald <mcdonald@xxxxxxxxxxxx>
- To: opendtv@xxxxxxxxxxxxx
- Date: Thu, 16 Feb 2006 12:34:36 -0600
Ian Mackenzie wrote:
> Doug
>
> You have it wrong as usual.
>
> The coverage of Sydney uses a SFN on UHF from
> Multiple transmission sites which are fed
>>From the digital transmission on VHF off air.
> No microwaves, no fibres, etc.
>
Then it's NOT AN SFN. Well, the UHF part micght or might not be
depending on whether the transmitters are phase-synchronized.
>
> As to transmitter costs the cost for a DVB
> Transmitter is identical to an ATSC transmitter
> It just uses a different modulator.
>
What you describe seems not to be a true SFN and if it
is just off-channel repeaters, it's no different from what
ATSC does trivially.
> The nationwide SFN is ridiculous, just like=20
> the thought of covering the USA in ATSC.
> In Australia anyone, anywhere can get the=20
> networks in digital if not FTA VHF or UHF
> Then on satellite.
>
Ah so you DON'T have universal COFDM OTA coverage!
Just what I thought.
Doug McDonald
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