This type of eye fatigue or eye strain is sometimes known as computer vision syndrome. It affects about 50%-90% of computer workers. Some estimates say computer-related eye symptoms may be responsible for up to 10 million primary care eye examinations each year.
MAST MOUNTED PREAMPLIFIERS. Chapter Eight-TV ANTENNA-MOUNTED AMPLIFIERS. A mast or TV antenna-mounted amplifier (preamp) is used primarily to eliminate snow on the TV screen.Snow is actually electrical noise that is generated by the TV receiver and other electrical devices.he preamp itself is mounted on the TV antenna boom or on the mast as close to the TV antenna as possible. The power supply unit is mounted indoors. Power is supplied to the preamp unit through the transmission line.
The disadvantages of the outdoor antennas are: 1  Easy to install, almost right out of the box. 2  Some have great receptivity wherever you place them in your home. 3  Some cheaper antennas have limited receptivity. 4  Choice of unidirectional or omnidirectional. 5  Better and increased receptivity of digital signal. 6  Usually located at the highest point on a ...epending of the location of your home you may not benefit from getting your TV programming from a TV antenna if you don't get enough channels where you live or, if the channels available in your area don't appeal to you. Before you start you may want to search all the stations broadcasting where you live.