Introduction to electronic circuit drawings:
U-201 type multimeter total circuit
Satellite broadcasting has the characteristics of wide frequency band, large capacity, stable and reliable performance, wide coverage and suitable for various services. It has become the main means of transmission for radio and television. The performance of satellite ground receiving antenna is directly related to the GH/T value of satellite ground receiving equipment, which determines the viewing quality of satellite broadcasting and TV programs. Therefore, the right choice of satellite receiving antenna is an important premise and guarantee of satellite receiving. Satellite ground receiving station basically chooses two kinds of antenna, namely parabolic antenna (feedforward) and cassegrain antenna (feedback). Parabolic antenna consists of a rotating-symmetric paraboloid, that is, the electromagnetic wave reflection surface and the feed surface, the feed surface in front of the paraboloid
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