Abstract: For a particle radiation?detector (PRD), an?analog signal?source?is required for?testing its electrical properties, and for following the equipment around each?test site. The available imported signal source?can not satisfy the requirements for it is quite bulky, not easy for operation, and has only a single output channel. In this paper, an?analog?signal source?is designed to replace the?imported one. The new source is characterized by having multiple signal outputs,?being independently adjustable?for each output channel, and using an internal?power supply?instead of an external one. The new signal source can meet all the design?objectives after?verification by test, and enjoys less weight and a more compact volume than the imported source.