Abstract: In the design of DR systems, high-voltage generators and X-ray tubes are two key components whose performance directly affects the system’s exposure capabilities. This article first explains the reason why it is necessary to conduct an in-depth evaluation of the performance of these two parts during the design of DR products. Then, it provides a detailed description of the evaluation methods, including the assessment of single exposure capability and continuous exposure capability. Finally, the article offers some suggestions and measures to enhance continuous exposure capability. These methods and suggestions not only help in selecting appropriate key components but also provide an important reference for the design, integration, and testing of DR systems.