
This is a superheterodyne receiver tuned to 49 MHz. U2 is a mixer, a 10.7MHz filter, two phase intermediate frequencies (U3, U4) and a detector behind it. The RE code signal received by the antenna code generates a detection pulse from the MC1330P.
Barium titanate lead-free piezoelectric ceramics are important basic materials for the development of modern science and technology, which was widely used in the manufacture of ultrasonic transducers, underwater acoustic transducers, electroacoustic transducers, ceramic filters, ceramic transformers, ceramic frequency discriminators, high voltage generators, infrared detectors, surface acoustic wave devices, electro-optic devices, ignition and detonation devices, and piezoelectric gyroscope and so on.
Application: military, ocean, fishery, scientific research, mine detection, daily life and other fields.

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Zibo Yuhai Electronic Ceramic Co., Ltd. , https://www.yhpiezo.com