A.0.005%,0.002% B.0.005%,0.2% C.0.5%,0.2% D.0.5%,0.002%
A.測(cè)頻的門控信號(hào)來(lái)自時(shí)基信號(hào),而測(cè)周的門控信號(hào)來(lái)自測(cè)量信號(hào) B.測(cè)頻的門控信號(hào)來(lái)自測(cè)量信號(hào),而測(cè)周的門控信號(hào)來(lái)自時(shí)基信號(hào) C.測(cè)頻、測(cè)周的門控信號(hào)均來(lái)自測(cè)量信號(hào) D.測(cè)頻、測(cè)周的門控信號(hào)均來(lái)自時(shí)基信號(hào)
A.fA信號(hào)放大整形后的信號(hào) B.fB信號(hào)放大整形后的信號(hào) C.晶體振蕩器產(chǎn)生的信號(hào) D.晶體振蕩器產(chǎn)生的信號(hào)分頻后的信號(hào)