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.
1 Move the antenna to a new location. 2  You may need to relocate the antenna to get a better signal and TV reception. 3  With digital signals, you must take into consideration which direction the signals are coming from, and locate your antenna in an area that will receive the signal. Adjust the antenna to get a better signal. 2  A digital signal is very sensitive, and simply rotating your antenna just an inch or two could provide great results. 3  Move the antenna to a new location.