The multichannel digital shutter velocity tester is mainly used in measuring the exposure time of a camera curtain shutter. Photoelectric receivers are placed at different points in the focal plane

by which the optical signals are converted to electric signals. The test system collects the electric signals through high speed collection channels by the preset order with DMA mode. After data processing

exposure time acquired by the method given in this paper is analysed and measured. The test system is not only accurate

but also reliable. The test results can be visualy displayed on the screen.