This paper presents a set of test methods of analog to digital converter (ADC) dynamic performance

which are used for ADC with high sample rate and large bandwidth in next generation optical transmission system. Based on the analysis of the characteristics of ADC in optical transmission

the following essential problems are solved

including measuring the frequency of sampling clock directly

gathering the output data

calculating the resolution

and correcting the nonlinear error of bandwidth testing. The methods are used in performance evaluation on ultra-high speed ADCs

which are used for high data rate applications

such as optical transmission

radar

satellite

etc. Based on the test results

these methods have solved the key problem of 70GSPS sampling rate 16GHz bandwidth high speed ADC

which can meet the requirement of ADC dynamic performance test used in next generation 400Gbps optical transmission.