qoistoochee128

[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

Related Devices

Devices	Class	introduce	Datasheet
49MD-11.0592-20-20-20/A	Analog mixed-signal IC;SMD crystal resonator (passive)	Equivalent series resistance (ESR): - Main frequency: 11.0592MHz Frequency tolerance: ±20ppm Load capacitance value: 20pF -	Download
2.54-1*6P母			Download
A09-472JP	Passive components;Network exclusion	Resistance (ohms): 4.7K Number of resistors: 8 Accuracy: ±5% Power per element: 1/8W Temperature coefficient: ±100ppm/°C	Download
RL80J102MDN1KX	Passive components;Solid electrolytic capacitor		Download
BB910	Discrete semiconductor;varactor		Download
KT-0603R	LED optoelectronic/LED;Light-emitting diodes (leds)	Illumination color: red Main wavelength/color coordinate: 615~630nm Forward voltage (Vf): 1.9~2.2V Color temperature - CCT (K): -	Download
A2541HWV-8P	The connector;The connector	Number of Pins: 8 Connector Type: Busbar Number: 1 Contact Type: Female Jack Pitch: 0.100"(2.54mm) -	Download
HC-49SM12MHz20pF30ppm	Analog mixed-signal IC;SMD crystal resonator (passive)	Equivalent series resistance (ESR): 50Ω Main frequency: 12MHz Frequency tolerance: ±20ppm Load capacitance value: 20pF -	Download
NEW3ACG	Other integrated circuit (IC);The LED driver		Download
22025403P00CKMT	The connector;Mother row needle row	Number of Pins: 3 Connector Type: Busbar Number: 1 Contact Type: Female Jack Pitch: 0.100"(2.54mm)	Download
MF1/4CCT52A2201F	Passive components;Metal film resistor	Resistance (ohms): 2.2K Accuracy: ±1% Power: 1/4W Temperature coefficient: ±50ppm/°C Metal film resistor copper feet, cylindrical plug-in 0.25W	Download
SR155C103KARTR1	Passive components;capacitor	Capacitance: 10nF Accuracy: ±10% Rated voltage: 50V X7R	Download
STC90C52RC-40I	The embedded processor and controller	Working voltage: 3.5V ~ 5.5V CPU bits: 8-Bit CPU core: 8051 Main frequency (MAX): 40MHz ROM type: FLASH Upgraded version of STC89C52RC-40I	Download
SR3100U	Discrete semiconductor;Schottky diode	DC reverse withstand voltage (Vr): 100V Average rectified current (Io): 3A Forward voltage drop (Vf): 850mV @ 3A 100V, 3A, VF=0.85V@3A	Download
TM8M475K010UBA	Tantalum capacitor		Download

All reference designs on this site are sourced from major semiconductor manufacturers or collected online for learning and research. The copyright belongs to the semiconductor manufacturer or the original author. If you believe that the reference design of this site infringes upon your relevant rights and interests, please send us a rights notice. As a neutral platform service provider, we will take measures to delete the relevant content in accordance with relevant laws after receiving the relevant notice from the rights holder. Please send relevant notifications to email: bbs_service@eeworld.com.cn.

It is your responsibility to test the circuit yourself and determine its suitability for you. EEWorld will not be liable for direct, indirect, special, incidental, consequential or punitive damages arising from any cause or anything connected to any reference design used.