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.
Sometimes, the problem is damaged antenna equipment, or it can be related to the location and type of antenna for the area. If a homeowner moves to another area, the original antenna may not be adequate to pick up new TV signals.Troubleshooting an outdoor antenna without professional help can be exceedingly difficult.epairing a TV antenna can be a simple matter of replacing or repairing broken equipment such as cables or elements. However, sometimes an antenna is too old to work properly or is even located in the wrong place.