发明名称 |
Message generation supervision system |
摘要 |
Circuits for supervising message generators and audio output cables include memory for binary storage of messages previously recorded in a message generator. As the generator is cycled to produce an audio output, that analog output is sampled and compared to the previously stored binary representation. A match indicates a successful generation of the message. The cables can be supervised by applying a DC bias thereto and detecting the voltage present on the respective cable. Line integrity is indicated where the cable DC voltage falls in an expected range.
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申请公布号 |
US5883573(A) |
申请公布日期 |
1999.03.16 |
申请号 |
US19970902842 |
申请日期 |
1997.07.30 |
申请人 |
PITTWAY CORPORATION |
发明人 |
MAZEIKO, JR., EDWARD J.;TROIANO, JR., MICHAEL A. |
分类号 |
G08B29/10;(IPC1-7):G08B29/10 |
主分类号 |
G08B29/10 |
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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