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[Guangxi Normal University Competition] FM receiver sensitivity test device

Overview

Project Description
(1) The topic requires
the design and production of an FM receiver sensitivity measurement device. Requirement 1. Basic requirements (1) Design and make a fixed carrier output device with a frequency of 98MHz and an SMA/Q9 interface output (50Ω impedance). (2) The carrier output amplitude is below -20dbm (50Ω impedance), and a spectrum analyzer needs to be used for measurement. The functional part (1) Make an FM transmitter with a modulation frequency offset of 75KHz and a frequency range of 88-108MHz; (2) Be able to manually/numerically control the carrier frequency of the FM transmitter, with the number of frequency points being no less than 4. (3) Further attenuate the amplitude of the FM signal, the output is below -40dbm, and has a step adjustment function with an accuracy of less than 1DB. (4) The FM signal has a shut-off function

Design Files

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Update:2025-06-19 18:23:36

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