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.
Here's what you should know before you make the jump to buying a sound bar. 1. The sound bar might block your TV's remote sensor. Glitzy product photos often show sound bars wall-mounted right below a TV, but most people place their sound bar on their TV stand. That can be problematic because larger sound bars have a tendency to block the TV's remote-control sensor, forcing you to stand up and angle your remote to control your TV.