[opendtv] Re: Compare and contrast to MSTV's 1999 position/testing
- From: John Willkie <johnwillkie@xxxxxxxxxxxxx>
- To: opendtv@xxxxxxxxxxxxx
- Date: Wed, 21 May 2008 10:40:25 -0700 (GMT-07:00)
seven years and many generations later, they're now warning consumers of the
real facts. Seems that the NxtWave improvements weren't enough.
I'd like to say more about the contemporaneous situation, but I have made a
pledge that I shall operate within.
John Willkie
-----Original Message-----
>From: Dale Kelly <dalekelly@xxxxxxxxxxx>
>Sent: May 21, 2008 8:32 AM
>To: opendtv@xxxxxxxxxxxxx
>Subject: [opendtv] Re: Compare and contrast to MSTV's 1999 position/testing
>
>I can attest to the accuracy of Nat’s’ claims, having been there and also
>having, on more than one occasion, reported this same information; only to
>have the "deniers", who have no personal experience in these maters, reject
>the facts out of hand.
>Dale
>
>> -----Original Message-----
>> From: opendtv-bounce@xxxxxxxxxxxxx
>> [mailto:opendtv-bounce@xxxxxxxxxxxxx]On Behalf Of Nat Ostroff
>> Sent: Tuesday, May 20, 2008 2:28 PM
>> To: opendtv@xxxxxxxxxxxxx
>> Subject: [opendtv] Re: Compare and contrast to MSTV's 1999
>> position/testing
>>
>>
>> For all of you who do not remember those times and events here is
>> some refresher information.
>>
>> The COFDM receiver, whose technical details and manufacturer were
>> hidden from the engineering committee, that was used to "fly off"
>> the 8VSB/COFDM test had a wide open 2ghz front end with a wide
>> band preamp and no filter. The 8VSB receiver was equipped a
>> normal channelized tuner. After the "strange" test results were
>> made available to the MSTV Engineering Committee, at the end of
>> the field operations, the details of the receiver's design were
>> made known to the Committee. . We at SBG were able to go out with
>> the very same COFDM receiver but with a preselect front end
>> filter and demonstrated that the entire test result were flawed.
>> Where the COFDM reception had failed and 8VSB had worked we found
>> that the filtered front end COFDM receiver was able to receive
>> the signal. In fact where 8VSB and COFDM had both failed in the
>> initial testing, the filtered COFDM receiver was able to receive
>> the transmissions.
>>
>> It became quite clear that the data for the COFDM tests were
>> corrupted by a receiver that was suffering from front end
>> overload by strong, off channel, signals. In fact, the
>> manufacturer of the COFDM receiver sent a letter stating that
>> their equipment was for laboratory use and not suitable for field
>> testing using an antenna. This information was presented to the
>> joint NAB/MSTV Boards in Carlsbad Ca. The joint Boards chose to
>> ignore the results and moved to approve support of 8VSB as the US
>> standard.
>>
>> So here we are today with the consequences of that decision. The
>> full impact of which may not be felt till Feb 09.
>>
>> Nat Ostroff
>>
>>
>> ----- Original Message -----
>> From: "John Shutt" <shuttj@xxxxxxxxx>
>> To: opendtv@xxxxxxxxxxxxx
>> Sent: Tuesday, May 20, 2008 3:46:38 PM (GMT-0500) Auto-Detected
>> Subject: [opendtv] Re: Compare and contrast to MSTV's 1999
>> position/testing
>>
>> That's because in 1999 MSTV was promised that NxtWave had
>> "cracked the code
>> for mobile and indoor reception."
>>
>> http://www.hdtvmagazine.com/archives/Nxtwave.html
>>
>> And in 2000, MSTV was told to ignore the flaws in the chosen
>> COFDM receiver
>> for the Washington/Baltimore/Cleveland MSTV-NAB tests.
>>
>> (Yes, Bert, I know.)
>>
>> John
>>
>> ----- Original Message -----
>> From: "John Willkie" <johnwillkie@xxxxxxxxxxxxx>
>> To: <opendtv@xxxxxxxxxxxxx>
>> Sent: Tuesday, May 20, 2008 2:51 PM
>> Subject: [opendtv] Compare and contrast to MSTV's 1999 position/testing
>>
>>
>> > Seems to me that MSTV's perspective now is at odds with their
>> defense of
>> > 8-VSB
>> > in late 1999.
>> >
>> >
>> http://www.washingtonpost.com/wp-dyn/content/article/2008/05/19/AR
>2008051902730.html?sid=ST2008051902978
>>
>> John Willkie
>
>
>
>
>
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