[opendtv] Re: FCC comments on DTT reception
- From: Mark Aitken <maitken@xxxxxxxxxx>
- To: opendtv@xxxxxxxxxxxxx
- Date: Wed, 14 Dec 2005 16:47:04 -0500
Yes, we have been trying to ingest the document for the last several
days. Our continuing message to Congress (the folks that drive the FCC!)
is simple. Read this report addressed to you, then make the FCC finish
its tuner mandate work (namely, specify performance requirements)!
Among other interesting facets of the OET discussion, the graph on page
34 details a large discrepancy in performance for a large variety of
receivers/tuners/converters based on multipath performance. While the
focus of discussion in this report is whether (or not) coverage
assumptions made by the FCC are relevant (they argue yes), the body of
data gathered can paint a picture similar to the focus of many previous
discussions.
While it is possible to develop/market/sell DTV
receivers/tuners/converters that work well (at least some prototypes
show promise!), there is NO MANDATE that they do so, any many fall
short! The fact that only ~ 1/3 of the tested units (from this report)
are capable of reception in this stated example (multipath environments)
adequately is a vivid portrayal of the realities WITHOUT a mandate for a
minimum performance requirement.
Additionally, while the CEA and most of its members tend to throw up the
ATSC A/74 "Recommended Practices" document as proof that there is no
need to specify performance requirements, the facts that the above OET
document shed light on tend to show otherwise. "Recommended Practices"
are NOT enough to ensure that the American public have ready access to
well performing DTV receivers/tuners/converters.
A recent article that has been recently posted here
(<http://www.digitaltvdesignline.com/showArticle.jhtml?printableArticle=true&articleId=173601582
<http://www.digitaltvdesignline.com/showArticle.jhtml?printableArticle=true&articleId=173601582>>)
puts into perspective the need to go /*beyond*/ the ATSC A/74
"Recommended Practices" document. While it is argued that the ATSC A/74
"Recommended Practices" is the baseline, issues such as real world
ability to perform well with multiple high power signals present are not
even spelled out in the recommended practices.
The whole body of evidence available today suggests that, YES!, it is
/*possible*/ to develop/market/sell DTV receivers/tuners/converters that
works reasonably well! The experience of the Broadcast community is
that, while possible, there is no reasonable expectation that the few
products put into the hands of Americans today /_will_/ work in the
majority of locations, most of the time, with simple antennas.
If the expectation of Congress is that DTV receivers/tuners/converters
WILL work for most Americans (a requirement to complete an ill-guided
transition), it is my opinionated suggestion that performance
requirements be placed on ALL such products, not simply the "digital to
analog converters" being looked at for subsidy. The future ability to
reach into American homes with "Over-The-Air" television under any
circumstances is surely at risk otherwise.
Mark Schubin wrote:
>http://hraunfoss.fcc.gov/edocs_public/attachmatch/FCC-05-199A1.pdf
>
>
>
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--
><> ><> ><> ><> ><> ><> ><>
Regards,
Mark A. Aitken
Director, Advanced Technology
<>< <>< <>< <>< <>< <>< <><
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in no institution of government,
until every part of it had been
adjusted to the most exact standard
of perfection, society would soon
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