Invention Grant
US4683459A Alarm system test annunciator 失效
报警系统测试报警器

Alarm system test annunciator
Abstract:
Test apparatus for a wireless system is provided in which an audible annunciation is produced which is an accurate indication of the measured received signal strength. A signal is derived from the receiver which is representative of the signal strength and which is employed to activate a speech synthesizer which provides annuciation of each of a range of digits, each digit annunication representing a predetermined increment of received signal strength.
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