Abstract: The passive position system carries on the localization by analyzing the signal time-of-arrive between each station. Exact passive position requests the transmission microwave system between central station and sub-station to be extremely precise. In this paper,we first analyze the principle of the multistatic passive radar video pulse transmission system and the threshold effect theory, then through the system simulation, some key parameter such as leading-edge jitter is deeply studied to investigate the influence of performance by various of video pulse modulation and channel constitution mode.