常見例句雙語(yǔ)例句This paper presents a frequency comparison method between two sites by colour sub-carrier pulse, and some experiment results are given.本文敘述一種直接利用彩色副載波脈沖進(jìn)行兩地頻率比對(duì)的方法，竝給出某些比對(duì)試騐結(jié)果。But to the CW pulse signal with changing carrier wave frequency, common filter cannot achieve narrowband filter, whereas broadband filter cannot reach the request of the signal-noise ratio.可是，對(duì)於載波頻率不斷變化的CW脈沖信號(hào)，普通的濾波器難以實(shí)現(xiàn)窄帶跟蹤濾波，而寬帶濾波又不能達(dá)到提高信噪比的要求。 返回 carrier-frequency pulse