Originally Posted by TheGSRGuy
I'm having some real issues with ABC (7-1) giving huge random blocks of digital noise every few minutes. Only about 7.5 miles from the Sears Tower. Signal strength is 80 or better. Occasionally see it on NBC (5-1) as well, but it's really obnoxious on ABC.
Antenna is a Radio Shack "UFO". No discernible reduction in this strange digital blocking by adjusting gain, location, or "channel" on it.
It's a problem with WLS, not you at all. They have recently reduced "bitrate" on the ABC HD feed, to allow a second HD feed to occupy the 19.4 Mbps (megabits per second) of bitrate WLS can use. The problem is, only one HD feed can occupy a digital TV station, without causing the problems you notice. For additional evidence, just watch a few minutes of the feed on 7-2.
This same problem also occurs at a Philadelphia, PA station that is, like WLS, owned by ABC. A screenshot of a user with the same problem can be seen in this post
NBC channel 5-1 has low-bitrate issues too, since that station airs too many feeds in their 19.4 Mbps feed, in addition to their HD channel. Since they don't have a second HD channel, their problem is smaller than WLS.