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Digital signals require a certain signal strength and quality to be received reliably. Above that threshold, the signal will be received without data loss and there will be no increase in image quality as a result of an increased signal strength.

As the signal quality decreases below the quality threshold, errors in the data stream will be noticed as a disturbed area of an image, no sound or a static image for short periods of time. When the quality of the signal decreases further, the image and sound will fail completely.

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