Radio Spectrogram Observations with the System of Photodiod Array and Microcomputer

The radio signals came from the sky are received by the antenna and the receiver.The radio signals are transformed into the optical informations by the acoustic-optical deflector.Then we could sample,store and proccess data with photodiod array and microcomputer,for example,we could make the real spetrogram analyses.With the system,we could subtracte the background,therefore we can raise the signal,noise rate.