发明名称 |
Method and apparatus for in-line detection of satellite signal lock |
摘要 |
A method and system for detecting satellite signal lock in a satellite receiver system is disclosed. The system may include a first filter that isolates a noise frequency from the satellite signal, and/or a second filter that isolates a service frequency from the satellite signal. A comparator may then determine whether the output of the first and/or second filters is greater than a threshold level associated with an incipient loss of lock on the broadcast signal. The method includes the steps of filtering a received broadcast satellite signal to generate a service signal having a center frequency between a first transponder center frequency of a first transponder band and a second transponder center frequency of a second transponder band that overlaps the first transponder band, and comparing the output of the filter to a threshold value. In either the method or the apparatus, a command may be issued if the signal value is below the threshold value, thereby informing the user of the loss of signal lock.
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申请公布号 |
US2005108759(A1) |
申请公布日期 |
2005.05.19 |
申请号 |
US20050030266 |
申请日期 |
2005.01.06 |
申请人 |
ARSENAULT ROBERT G.;LONER PATRICK J. |
发明人 |
ARSENAULT ROBERT G.;LONER PATRICK J. |
分类号 |
H04B7/185;H04H40/90;(IPC1-7):H04N7/20 |
主分类号 |
H04B7/185 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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