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Tv Reception
For more fun go to the >Start MAPS< part of tvfool change the antenna height up and down and watch what happens to the noise margin NM , The higher the positive number the better. Can also move the red balloon pointer to other locations . The reference number for noise margin is 0 NM dB for reliable reception . There have been reports of getting reliable reception down to - 18.0 NM dB However this is the exception not the rule
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