Security system
First Claim
1. An alarm system comprisinga plurality of satellite stations, each of which includes a sensor and associated transmitter circuitry responsive to the sensor for transmitting an alarm signal,central station apparatus remote from said satellite stations for receiving the alarm signal and operating an output device in response to the received alarm signal,means for modifying the received alarm signal,processor means for evaluating the received alarm signal and producing an output signal in response thereto,test mode control means,means responsive to said test mode control means for placing said signal modifying circuitry in a test mode to reduce the effective range of the transmitter receiver combination, andmeans operative in said test mode and responsive to said evaluation apparatus for producing an output signal in response to satisfactory evaluation of the received alarm signal.
1 Assignment
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Accused Products
Abstract
Methods and apparatus for evaluating installation of components of a wireless type of alarm system or the like that includes a plurality of satellite stations, each of which includes a sensor and associated transmitter circuitry responsive to the sensor for transmitting an alarm signal and a central station for receiving the alarm signal and operating an output device in response to the received signal. The system includes alarm signal processing circuitry that has a first (normal) mode for processing the received signal and second (installation) mode in which a characteristic of the received alarm signal is impaired so that a received signal of greater quality than in normal mode is required to operate the output device.
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Citations
17 Claims
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1. An alarm system comprising
a plurality of satellite stations, each of which includes a sensor and associated transmitter circuitry responsive to the sensor for transmitting an alarm signal, central station apparatus remote from said satellite stations for receiving the alarm signal and operating an output device in response to the received alarm signal, means for modifying the received alarm signal, processor means for evaluating the received alarm signal and producing an output signal in response thereto, test mode control means, means responsive to said test mode control means for placing said signal modifying circuitry in a test mode to reduce the effective range of the transmitter receiver combination, and means operative in said test mode and responsive to said evaluation apparatus for producing an output signal in response to satisfactory evaluation of the received alarm signal.
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11. For use in an alarm system that includes a plurality of satellite stations, each of which includes a sensor and associated transmitter circuitry responsive to the sensor for transmitting an alarm signal, and
central station apparatus remote from said satellite stations for receiving the alarm signal and operating an output device in response to the received alarm signal, said central station apparatus including processor means for evaluation of the received signal and producing an output signal in response thereto, an installation method comprising the steps of positioning a sensor in an area to be monitored, actuating said sensor to cause its satellite station transmitter circuitry to transmit an alarm signal, impairing the alarm signal received by said central station to enable evaluation of the quality of the received signal and the quality of the transmission path between the transmitter and the central station, producing an output signal in response to satisfactory evaluation by said processor means of said impaired received signal, repositioning said sensor in said area to be monitored in the absence of said output signal, actuating said repositioned sensor to cause its satellite station transmitter circuitry to transmit an alarm signal, and removing the alarm signal impairment for normal system operation.
Specification