[opendtv] Re: New DTV SIGNAL STRENGTH PREDICTOR

Bert wrote:
> BTW, AntennaWeb used to be very accurate for me, showing all the Balt
> stations I receive, but then they suddenly "got religion" and
> turned overly
> conservative. On the other hand, this site shows more stations than I can
> receive, but then they give signal strengths that are really low, and
> co-channel interference warnings for a good many of them.

That is a good call on you part; AntennaWeb did change reception criteria to
compensate for overly optimistic predictions. I spoke to the programmer, who
confirmed this. In my particular location the prediction it is still overly
optimistic, showing coverage that we do not have. This lack of reception is
the result of serious terrain obstructions, which they continue to miss.
However, if terrain is not a significant issue I believe that they are
fairly accurate.

> -----Original Message-----
> From: opendtv-bounce@xxxxxxxxxxxxx
> [mailto:opendtv-bounce@xxxxxxxxxxxxx]On Behalf Of Albert Manfredi
> Sent: Thursday, June 21, 2007 5:45 PM
> To: opendtv@xxxxxxxxxxxxx
> Subject: [opendtv] Re: New DTV SIGNAL STRENGTH PREDICTOR
>
>
> Tom Barry wrote:
>
> >Cool site!
> >
> >It shows I've got a couple low power digital stations less than 2
> >miles away, though I don't seem to be able to get them.
>
> It is a cool site. I like the fact that they give you the signal
> strength.
> It does list some statiuons I can't receive, but ...
>
> Even though I entered an antenna height of 30', they say my strongest
> station is -70 dBm, and ones I pick up fine are just about always
> below -80
> dBm. One Balt example that is reliable supposedly comes in at
> -120 dBm. My
> Annapolis PBS station is -105 dBm.
>
> Man, these Accurians rock!
>
> BTW, Antennaweb used to be very accurate for me, showing all the Balt
> stations I receive, but then they suddenly "got religion" and
> turned overly
> conservative. On the other hand, this site shows more stations than I can
> receive, but then they give signal strengths that are really low, and
> co-channel interference warnings for a good many of them.
>
> I think that my Hata model, as tweaked by the ITU-R, is instead
> my best bet.
> If it shows received signal strength of around -73 dBm, I'm good. That
> sounds reasonable. Sometimes, more complex does not translate to more
> realistic.
>
> Bert
>
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