Demodulator for satellite communication
专利汇可以提供Demodulator for satellite communication专利检索，专利查询，专利分析的服务。并且PURPOSE:To make time required for re-locking a sub-synchronous carrier reproducing circuit shorter when the locking of the circuit is stepped-out, by causing sweeping by means of a sweeping circuit to be started after the sweeping starting point is set at the minimum or maximum frequency of a voltage-controlled oscillator (VCO) by resetting the counter of the sweeping circuit only. CONSTITUTION:When the carrier frequency changes from fc to fc' due to the relative movement of a geostationary satellite and the locking state is stepped- out, a counter 71 starts counting after it is reset and the sweeping by means of a sweeping circuit 7 is started from a frequency fVMIN in the vicinity of the minimum frequency fVMIN or a frequency fVMAX in the vicinity of the maximum frequency fVMAX of a voltage controlled oscillator (VCO) 8 as shown by the solid line or chain line. Then the sweeping is carried out in the direction, in which the frequency of the VCO 8 is successively raised or lowered. Therefore, the locking frequency fc can be searched in a short period.，下面是Demodulator for satellite communication专利的具体信息内容。
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