Hyundai H-TV1403, Инструкция по эксплуатации

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The causes of interference
Incorporated in your TV receiver are the most up to-date devices to eliminate interference. Local radiation however, can create disturbances which
visibly affect your picture. Proper installation, a good aerial are your best safe-guards against these disturbances.
RF INTERFERENCE
Moving ripples across the screen are caused by nearby transmitting or receiving-short-wave radio equipment.
DIATHERMY
Herringbone pattern and partial picture loss can result from the operation of diathermy equipment from a nearby doctor's surgery or hospital.
SNOW
Weak TV signals from long distant stations result in an instead picture and give the effect of falling snow. An antenna adjustment or antenna amplifier
may be needed.
GHOST
Multiple image caused by TV signals reflected back from surrounding buildings, hills, aircraft, etc. is minimized by correct aerial positioning.
CAR IGNITION
Nearby cars and electrical motors can cause small streaks across the picture or make the picture roll.