초록 ▼

A method for testing the signal margin of an alarm system during installation of the alarm system and during the alarm system supervision time. The alarm system comprises a plurality of remote transmitting devices and a receiver/control unit. The receiver/control unit comprises a receiver with at le

A method for testing the signal margin of an alarm system during installation of the alarm system and during the alarm system supervision time. The alarm system comprises a plurality of remote transmitting devices and a receiver/control unit. The receiver/control unit comprises a receiver with at least one antenna apparatus and processing apparatus for processing messages received from each of the remote devices. Both the install mode and the supervision mode cause the receiver/control unit to receive signals at a lower level than normal by selecting an associated antenna configuration. When entering the installation mode, the processor switches the antenna apparatus to a "no antenna" state, and when entering the supervision mode, the processor switches two or more antenna apparatus to an "on" state.

대표청구항 ▼

[ We claim:] [1.] In an alarm system comprising a receiver/control unit having a receiver associated therewith and a plurality of remote transmitting devices relocatable with respect to the receiver/control unit, the receiver comprising at least one antenna device, a method for testing a signal marg

[ We claim:] [1.] In an alarm system comprising a receiver/control unit having a receiver associated therewith and a plurality of remote transmitting devices relocatable with respect to the receiver/control unit, the receiver comprising at least one antenna device, a method for testing a signal margin of the alarm system during the installation of the alarm system comprising the steps of:a) initiating an install mode in the receiver/control unit,b) impairing an operational parameter of the receiver by changing a characteristic of the antenna device,c) transmitting a message from a remote transmitting device,d) receiving the message at the receiver, ande) indicating when the message is successfully received.