http://www.linuxretail.com/meter-electronic-2/
Meter Electronic
What is the function of an oscillator(3.5MHz)in an electronic meter?
Kindly suggest few web site describing its theory
Without seeing the meter for myself, I can only make a very educated guess.
The oscillator is for the microcontroller (microprocessor) inside the meter. The microcontroller does all the data handling and control for the meter, reading the dial/switch settings (what you want to measure), switching the inputs to the proper attenuator, reading the analog-to-digital converter, and driving the Lcd Display. The microcontroller needs a "clock" oscillator to operate, and 3.5 MHz is in the typical range of frequencies at which they operate.
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