| "power" : string | If 1 the frontend is powered up and is ready to be used.
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| "signal" : string | If 1 the frontend detects a signal above a normal noise level
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| "lock" : string | If 1 the frontend successfully locked to a DVB signal
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| "carrier" : string | If 1 carrier dectected in signal
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| "biterbi" : string | If 1 then lock at viterbi state
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| "sync" : string | If 1 then TS sync byte detected
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| "tuner_lock" : string | If 1 then tuner has a frequency lock
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