On 12/2/06, Haavar Valeur <[EMAIL PROTECTED]> wrote:
I got a PVR-500, and I'm having some problems with the picture quality. I think my signal is pretty strong from the cable provider. When I turn off the internal amplifier on the card (in the kernel), I get a snowy picture on some channels and a pretty good on others. When I leave the amp on, I get distortion lines on some channels others are fine. It seems to me the problem could be solved here, but there is a lot of tuning and recompiling the kernel to be done. Are you sure that some cards are more sensitive than others, and it's not that peoples cable signal is different? If there is a chance I could get a better card, I could return this and get another one.
I am not sure of this but I can possibly do some testing on my non amplified signal. I'll explain. When I first connected my cable modem to my cable line my signal was below standards around downstream channel power of -13 dBmV and a upstream channel power of > 60dBmV. With these signals I was experiencing a lot of problems with my modem (disconnects and poor speed). I complained a few times to the cable company but they were not much help and since I bought my modem and did not rent one from them for $5/month they were giving me a hard time. So I did a little homework and shopping on eBay and in 1 week and $35US I had myself a quality cable modem amp. With the 4 port amp installed instead of the main splitter inside of the house on I was getting around 0dbmv downstream (which is ideal) and around 35dBmV upstream in my computer room which is 2 floors above the cable amp. Two years later my signals are a little stronger downstream power of around +6dBmV right now. But anyways I could easily put the original splitter back on the main and test. With this setup I estimate my downstream power to be around -6dBmV. I'm getting the best PQ on most channels by padding the cable with a
3 way slitter and leaving the internal amp on (as it is in the 2.6.18 kernel). I padded my signal by connecting my cable from the wall into the output of a 3 way splitter and connected my computer to another output (nothing on the input). I've ordered actual signal pads (attenuators) and a ground breaker to see if this helps.
This is exactly what I did to get the best signal. John
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