[opendtv] Re: Demand for free DTV rising in Australia

ISTR at least one commenter seeing the system work at 90 mph.

John Willkie

-----Mensaje original-----
De: opendtv-bounce@xxxxxxxxxxxxx [mailto:opendtv-bounce@xxxxxxxxxxxxx] En
nombre de Craig Birkmaier
Enviado el: Saturday, June 23, 2007 7:38 AM
Para: opendtv@xxxxxxxxxxxxx
Asunto: [opendtv] Re: Demand for free DTV rising in Australia

At 4:11 PM -0400 6/22/07, Manfredi, Albert E wrote:
>John Shutt wrote:
>
>>  At the 2000 NAB, Sinclair used HM-COFDM to delivered 13.6 Mbps
>>  to fixed receivers on the exhibition floor using indoor
>>  antennas, and simultaneously delivered 4.5 Mbps to a portable
>>  Nokia Mediascreen that worked everywhere in Las Vegas,
>>  including in a car traveling at well over the legal highway
>>  speed limit, and could only be made to fail when shut inside
>>  of a transmitter cabinet.
>>
>>  At the 2007 NAB, A-VSB delivered 14 Mbps to fixed receivers
>>  and 500 Kbps to mobile receivers that never broke 25 MPH.
>
>Question 1: Did you do a C/N margin comparison? If not, why not? What
>are we comparing here?
>
>Question 2: Did the mobile test try highway speeds for A-VSB? If not,
>why not? What are we comparing here?
>

The Samsung R&S A-VSB mobile demo did get onto a freeway and I would 
guess the spped was up to 45-50 MPH. This did not cause any major 
problems - perhaps a few more break-ups for the less robust 
constellations that were demonstrated.

Regards
Craig
 

 
 
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