[opendtv] Re: (No To: opendtv@xxxxxxxxxxxxx
- From: "Dale Kelly" <dalekelly@xxxxxxxxxxx>
- To: <opendtv@xxxxxxxxxxxxx>
- Date: Sat, 12 Apr 2008 12:13:36 -0700
My personal experience with AntennaWeb is based upon coverage studies done
in central California?s Santa Barbara market and the results are universally
inaccurate for two reasons:
1. The terrain database has marginal resolution, which results in reception
predictions that are physically impossible. If one studies the terrain
profile using using Delorme?s Topo USA, or by simply referencing a topo map,
the prediction errors are obvious.
2. The software does not always correctly locate the receive location.
However, the latest version of the software does allow the user to correct
that error if they recognize it exists. However, correcting the receive
location does not improve the resolution issue, if it is in play for the
particular location.
The TVFool product was consistently more accurate for my particular studies.
Dale
-----Original Message-----
From: opendtv-bounce@xxxxxxxxxxxxx [mailto:opendtv-bounce@xxxxxxxxxxxxx]On
Behalf Of Richard Hollandsworth
Sent: Friday, April 11, 2008 5:57 PM
To: opendtv@xxxxxxxxxxxxx
Subject: [opendtv] Re: (No To: opendtv@xxxxxxxxxxxxx
On 12Feb2008, Centris website admitted that their (proprietary) study was
based on
antennaweb.org, as was cited in Dave Lung's 15Feb article:
http://www.centris.com/pages/viewnews.aspx?newsID=34&SiteID=9
http://www.tvtechnology.com/pages/s.0015/t.11299.html
Also note the current article reiterates that they ASSUMED outdoor
antennas, despite
their separate study indicating over 47% of OTA users used indoor
antennas.
PS: I find Longley-Rice model results from Radio-Mobile and www.tvfool.com
to be
quite accurate, although neither includes
tree loss, attic/indoor loss, antenna gain
and whether or not a Preamp is used.
Which is why I plug Radio-Mobile propagation loss results into a spread
sheet.
holl_ands
=================================
Doug McDonald <mcdonald@xxxxxxxxxxxx> wrote:
Richard Hollandsworth wrote:
> This appears to be simply more detailed data released from the Feb
study.
>
> No one puts any credence in the Centris study:
> http://www.tvtechnology.com/pages/s.0015/t.11299.html
>
> Because the Centris study simply used www.antennaweb.com
> to predict coverage,
REALLY??
Are you sure you know what you are talking about?
(A rhetorical question ... you don't ...)
Hint: look carefully! You'll figure it out.
Doug McDonald
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