[opendtv] Re: Compare and contrast to MSTV's 1999 position/testing
- From: "Bob Miller" <robmxa@xxxxxxxxx>
- To: opendtv@xxxxxxxxxxxxx
- Date: Wed, 21 May 2008 12:41:26 -0400
If you read the comments attached to the Post article that started this
thread you will see that there are already a lot of unhappy campers out
there even before the tap is turned off.
A lot of people who have reception problems of all kinds. There are going to
be millions more.
Bob Miller
On Wed, May 21, 2008 at 11:32 AM, Dale Kelly <dalekelly@xxxxxxxxxxx> wrote:
> 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<http://www.washingtonpost.com/wp-dyn/content/article/2008/05/19/AR2008051902730.html?sid=ST2008051902978>
> >
> > John Willkie
>
>
>
>
>
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