Patent ID: 8416349

Claim:
A broadcast reception device having, comprising: a smart antenna switching directivity based on a control signal and not returning a signal in compliance with the EIA/CEA-909 standard; a unidirectional antenna with fixed directivity; a set top box connected to the smart antenna or the unidirectional antenna and obtaining airwave received by the smart antenna or the unidirectional antenna via an RF cable; wherein the set top box comprising, a controller outputting the control signal, a power supply circuit generating a power supply voltage, a connection interface connected to the smart antenna with a first wiring and a second wiring, supplying the smart antenna with the power supply voltage via the first wiring and supplying the smart antenna with the control signal via the second wiring, a connection detection section detecting a voltage of the first wiring by using a resistance connected in parallel with the first wiring, wherein the controller selects whether a channel search is executed in the smart antenna or in the uni-directional antenna based on the value of the detected voltage of the first wiring, the controller judges that the smart antenna is connected if the detected voltage of the first wiring is lower than a predetermined threshold value and that the smart antenna is not connected if the detected voltage of the first wiring is higher than the predetermined threshold value, the controller executes channel search in the smart antenna when it is judged that the smart antenna is connected, and executes channel search in the uni-directional antenna when it is judged that the smart antenna is not connected.