[mythtv-users] Using Cable-tv certain channels fuzzy

[Daniel Leaberry]

This is a mystery to me so I figured I'd let others offer help.

I receive basic cable (about 20 channels) at my house and use a pvr-500 to
record with a dedicated backend in the garage. 1 week ago channels 7-13
began to show moderate amounts of noise. I changed nothing. Today I had the
technician come out and check my line. The signals are fine, the filters are
fine everything seems fine on their end. The setup has been running
flawlessly for over 2 months.

Things I've tried:

1) replacing the cable between the pvr-500 and the splitter (one end goes to
the cable modem)
2) fine tuning the frequencies using ivtv
3) rebooting

Things I suspect might have something to do with it:

1) The backend runs in the garage which is un-airconditioned and typically
between 80-95 degrees. Maybe the heat affects only certain channels? I would
think it would add noise to all the channels.

My setup is as follows:

*Dedicated backend running dual p3's and pvr-500. lspci -v of the tuner is
as follows

02:09.0 Multimedia video controller: Internext Compression Inc iTVC16
(CX23416) MPEG-2 Encoder (rev 01)
        Subsystem: Hauppauge computer works Inc. WinTV PVR 500 (2nd unit)
        Flags: bus master, medium devsel, latency 64, IRQ 7
        Memory at f4000000 (32-bit, prefetchable) [sizedM]
        Capabilities: [44] Power Management version 2

I'm using ivtv 0.4.5 on kernel 2.6.15 (gentoo).

Just fishing for possible issues. I would love to hookup a tv and see if
it's just the card but I don't own one (The frontend connects to a 21"
monitor). I'll have to ask the neighbor and see if I can borrow one.
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