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Intermittent Signal Dropouts and Pixelation

I have had FIOS since 2007 and up until a couple of months ago have had flawless service. I am in the central VA area. I am now experiencing signal dropouts and picture degradation on any channel in the 327 Mhz - 345 Mhz range. These problems are intermittent and occur on channels 568, 744, 780, 781. I have one TV and no splitter with a 12 db attenuator inline with the cable that comes directly from the ONT. I have a TV cable card for signal decryption with no set top box.

I have tried no attenuation of the signal and different levels of signal attenuation without correcting the problem. I have also tried eliminating obvious sources of interference, such as wireless routers, computers, and phones. A tech at the Fiber Solutions Center said that no one else in my area has reported the problem.

Again, the problem is intermittent. It can occur at random times during the day and night. I can have up to a week of problem-free service, followed by several hours where the broadcasts on these channels are unwatchable. All other channels are fine.

I don't have another TV for testing. Any thoughts or suggestions appreciated.

Comments

GaryDoug

When I had a similar problem on another service, it was a damaged cable with an open shield.The cable was slightly underground and someone had hit it with a shovel while "gardening". The water has gotten in and corroded the shield strands making it open circuit between the ends. I discovered it with an ohmeter by shorting one end with a wire jumper and using the ohmeter function at the other end (should read near 0 ohms, but it read over 10megs).

The symptoms I had were usually late at night and the same as yours.

This could be caused by many reasons, including low or high signal strength. Or even a defective TV. Or a bad fiber cable.

bugged

Thanks for the reply. Diagnostics on my TV indicate a low signal strength. I've noticed the SNR on these channels drop below 32 when the problem occurs. But then it will magically fix itself at some point and the SNR will revert back to the 37-38 level. I'm no expert, but I would be very surprised if the TV tuner was defective within a narrow frequency band. Maybe the ONT has developed a glitch. I dunno...

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