This paper presents a type of frequency characteristic testing meter which is based on single chip microcomputer. It can measure the magnitude characteristic and phase characteristic of a system expediently. It also has a simple structure and a lower price, especially be suited for experiment teaching. This frequency characteristic testing meter has combined the advantage of computer and single chip microcomputer. The computer has strong data processing ability and it can carry out complex programming. The single chip microcomputer connects hardware direct and it is easy to carry out real time controlling. In this paper, its structure, hardware design and software design have been illustrated and also some problems I have met and the solutions have been presented.
Key words Frequency Characteristic, Testing Meter, Single Chip Microcomputer, Serial communication