[mythtv-users] Hauppauge WinTV-quadHD TV Tuner Card 1609 and Pixelation

Allen Edwards allen.p.edwards at gmail.com
Mon Feb 18 03:01:09 UTC 2019

On Sun, Feb 17, 2019 at 5:55 PM Barry Martin <barry3martin at gmail.com> wrote:

> Jim and Devin:
> You mentioned the HVR-2250.  I threw that card away because it could not receive my local PBS station. my HDHR Connect and Quatro can receive that station at ~50%.  My new WinTV Quad PCIe receives that station at 83%.
> - -
> I would encourage you to be very careful throwing around these numbers
> as they are not an apples-to-apples comparison.  Each demodulator chip
> exposes it's SNR and signal level in a different format, so the scales
> are largely arbitrary (and each of the three products you mentioned
> have different demodulator chips).  Knowing that 50% is worse than 80%
> is useful for a particular card, but don't think 80% on one product is
> the same as 80% on a different product if they have different
> demodulator chips.
> Thanks for the replies. I found Jim’s comment interesting as I also have
> problems receiving the two local PBS stations – one is 80 KW ERP, the other
> 368 KW – guess which one causes me the most difficulty? Here the
> transmitting antennae are on the same tower which is also shared by the
> three 1000 KW stations, so other than transmitting power and frequency the
> only difference is elevation.
> As for the signal strength reading I interpret the display as a relative
> value. It has been probably almost two years since I did the testing but I
> think my system needed a ‘48’ to get a usable signal but was only able to
> get to around ‘90’ as maximum reading. My intent was not to get a high
> number but a more consistently usable signal; if it ended up at ‘75’ and I
> could essentially eliminate the pixelation I’d be overjoyed!
> As for the the of high-end test equipment and design – Devin provided a
> good explanation. As I suggesting an an earlier post I’m thinking over the
> years improvements have been in tuner technology. While I don’t think using
> a current tuner will magically eliminate all of my pixelation issues it
> appears upgrading will be a worthwhile cost; thanks to all for their input.
> (Now to get the time and money!)
> Barry

You can pretty much make the sensitivity of all of the tuners irrelevant
with a preamp right at the antenna.

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.mythtv.org/pipermail/mythtv-users/attachments/20190217/df34c688/attachment.html>

More information about the mythtv-users mailing list