Federal legislation allows consumers to arrange a digital signal strength test to verify whether the predictive model used to determine DNS eligibility is correct. If the test indicates that your location cannot receive a sufficiently strong signal from your local stations, DIRECTV may add DNS service to your account. DIRECTV will provide you with information about testing requirements but you must make all the necessary arrangements and pay for any associated costs. (Pricing varies but typically runs between $150 and $500.) Get more info on signal strength testing.