ʱperiod㹫ʽ

ȣԼҪĶʱʱ䣬200msôҲ˵Ҫ200msʱ䶨ʱֵﵽֵҲ˵ֻҪ֪200msʱǶ־ֵ֪ѽôõʱ䶨ʱļֵ+1ϵͳʱӣÿϵͳʱӵʱ+148MHzT(λ)=1/fô˵ÿ1/48MHzʱǼ+1ܵҪֵǣ200*1000/T-1Ͷˣչ200*1000*48.ܻΪʲô200*1000Ȼ48M4848000000ʵûдǺÿһ㣬ʵ㷨ӦTλsmsʵ0.2*48000000Ȼ-1ĻΪ0ʼ㡣ֵperiod




پ֪ҪļƵʱҪֵļ㹫ʽˣ
ȼҪµĶʱƵΪ500Hz500Hzʲô˼ǶʱΪ1/500Hz=0.002s=2msͷ˰ɣֻصһ㹫ʽˣ0.002s*48000000

ֵ˰