Whats the buzz on buzzing cable channels?
Q. We have digital cable. Lately we have noticed a buzzing sound on the lowest channels. When we go to the higher channels, it disappears. The situation is the same for both of our TVs. Why would this happen? It does not make any sense. — Trish, Green Tree A. A service visit from your cable company is required to know for sure, but the problems you are experiencing suggest interference on your analog band of channels. Most digital cable services are a hybrid of analog and digital video sources, unlike digital satellite service, which is 100 percent digital. To explain what this means to you, a little lesson in analog and digital cable service is probably in order. With analog cable, the television signal is similar to the signal you would receive with an antenna. It is a radio frequency signal, containing picture and sound information. Either your television’s tuner or your cable box tunes in the signal and sends it for display on your television. Radio frequency signals are subject t
