●●● ●●●● ●●●心 ●●●● Functions:Proving precisely controlled sources for ●●●●0 ●●●● frequency conversion and carrier generation. ●●●● ●● Simple transistor oscillator:lack the frequency stability and low-noise performance.简单的晶体管振荡器频率稳定度 和低噪声性能差。 Require: Frequency stability:0.5~2 PPM PPM:10-6△f/f;(PPb:10-9:PPt:10-12) Phase noise:-80~-110dBc/Hz @10kHz Crystal controlled oscillators with high frequency stability and low phase noise are often used to provide accurate frequency reference.晶体控制的振荡器具有高的频率稳 定度和低的相位噪声，因而常常用来提供精确的频率参考 8Functions: Proving precisely controlled sources for frequency conversion and carrier generation. Simple transistor oscillator: lack the frequency stability and low-noise performance.简单的晶体管振荡器频率稳定度 和低噪声性能差。  Frequency stability: 0.5~2 PPM PPM: 10-6Δf/f; (PPb: 10-9; PPt: 10-12)  Phase noise:-80~-110dBc/Hz @10kHz Require: Crystal controlled oscillators with high frequency stability and low phase noise are often used to provide accurate frequency reference.晶体控制的振荡器具有高的频率稳 定度和低的相位噪声，因而常常用来提供精确的频率参考 8