常見(jiàn)例句雙語(yǔ)例句The paper discusses on DDS spectrum purity improvement, and gives the circuit scheme.對(duì)如何提高DDS輸出頻譜純度進(jìn)行了探討，并給出電路解決方案。A frequency Synthsizer wtih high spectrum purity, low noise level and fast hoppingcapability is necessary in frequency hopping communication system.在跳頻通信系統(tǒng)中需要頻譜純度高、噪聲電平低和具有快速跳頻能力為頻率合成器。It has important significance in the design of high purity spectrum agile signal synthesizer and frequency synthesizer in military digital communication equipment.這對(duì)于高純頻率捷變合成信號(hào)源和軍用數(shù)字通信設(shè)備中頻率合成器的設(shè)計(jì)具有重要意義。 返回 spectrum purity