[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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