Zenith Television Receiver Operating Manual

by Anonymous

This control is used in correcting for vertical movement, or rolling up or down. Set control to lock picture. (Fig. 5)
		FIG. 5

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The most effective means of reducing interference to a minimum has been built into your Zenith Television receiver. Occasionally however, the picture may be affected by electrical interference or reflections.

AUTO IGNITION AND APPLIANCES

Automobile ignition, electrical appliances, etc., cause a speckled streaked appearing picture as shown. This condition is most noticeable in weak signal areas. (Fig. 6.)
		FIG. 6

DIATHERMY

Diathermy produces a distinctive herringbone pattern and one or two horizontal bands across the face of the picture. (Fig. 7). It can sometimes be reduced or eliminated by the insertion of a filter trap at the antenna terminals.
		FIG. 7

R.F. INTERFERENCE

Radio signals by a neighboring commercial, amateur or police station may cause interference in the form of moving ripples or diagonal streaks. Television or FM receivers operating near your receiver, can also be the reason for this reaction. (Fig. 8.)
The insertion of a filter trap at the antenna terminals of the TV receiver will sometimes eliminate or reduce this type of interference.		FIG. 8