more likely to scramble their signals when they become aware that home viewers and other "unauthorized" viewers are watching their signals. Therefore, those who know what signals are available may sometimes be reluctant to share that information in open forums. While sites exist that attempt to list currently viewable FTA signals, most of them are incomplete or do not contain current information. Such sites typically rely on reports of changes by viewers, and if viewers are reluctant to report new FTA signals for fear they might disappear, it becomes more of a challenge for such sites to maintain up-to-date listings. What some would consider the most desirable signals, e.g. feeds from broadcast networks, are primarily only available on C-band, which requires a large dish (usually at least in diameter or more, although a few hobbyists have found it possible to receive some C-band signals using smaller dishes and high quality LNBs). Also some of those signals utilize high-bitrate formats that cannot be received by many older receivers, even if those receivers are capable of receiving digital signals, and such signals may require a larger than usual dish for adequate reception. In many areas, local zoning laws and/or homeowner associations forbid the placement of a large dish, therefore such dishes have fallen out of favor since commercial satellite services became widely available. Therefore, very few people have the capability to receive the C-band broadcasts. Another issue is that properly aiming a C-band dish is not something that a typical end-user would know how to do, since it tends to be a somewhat complex procedure (especially when a moveable dish is used with the intention of tracking the visible satellite arc in order to receive multiple satellites), and many of the installers that knew how to set up and correctly aim a C-band dish have exited the business. While equipment and software is becoming available that allows home users to set up a backend system that can deliver received over-the-air ATSC signals to several frontend systems (for example, a HDHomeRun, VBox Home TV Gateway or similar TV tuner, used with MythTV or TVHeadEnd), a similar system for receiving FTA signals is considerably more difficult to set up. While PCI/PCIe tuner cards and USB tuners for DVB-S and DVB-S2 are available, there are often issues with drivers, or the cards may simply not be compatible with the backend software in use. Therefore, setting