There's some fine tuned analog circuitry inside the RF tuner box on the
card, and I think it's possible that heat or voltages that are too high
or too low could cause the components to go out of spec in such a way
that there is signal loss only at specific locations in the spectrum.
If RF noise makes it into the tuner, it could cause problems at the
frequency the noise is at and all harmonic frequencies as well, causing
seemingly random channels to have issues. Noise could come in via the
power from the power supply or via electromagnetic radiation.
It could also be that the signal strength on the channels you're having
trouble with are low, and your TV is able to handle it, while the PVR
350 is not. A signal amplifier might help then.
On 2011-09-05 18:49, Sathish Vasudevaiah wrote:
Thanks, I will investigate these three points.
In my case, I do not have a regular cabinet instead a custom made with
everything tightly packed around a mini-ITX board. There is only one PCI
slot on the board. I will especially check up on the power supply.
One thing that confuses me is that there are some channels which are
equally good on both the legs of the splitter. If it is heat or the power
supply problem, I guess it would have affected these channels also, no ?
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