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一、概述数十千赫以上的内信号发生器称高频和超高频信号发生器.按等级和用途的不同,可分为标准信号发生器和信号发生器.标准信号发生器的主要特点是:有经过校准的输出功率(或电压),有可调且方式可变的内调制(如调幅、调频和方波调制),它的屏蔽、频率准确度和稳定度、调制波形等要求都较高,主要用来测试接收机的信噪比、灵敏度、选择性等技术指标.信号发生器则一般具有较大的功率输出,分米波以下(指分
I. Overview The internal signal generator above tens of kilohertz is called high frequency and ultra high frequency signal generator, which can be divided into standard signal generator and signal generator according to the grade and purpose. Yes: There is a calibrated output power (or voltage), an adjustable and modifiable internal modulation (such as AM, FM and square wave modulation), its shielding, frequency accuracy and stability, modulation waveform and other requirements are High, mainly used to test the receiver signal to noise ratio, sensitivity, selectivity and other technical indicators.Generators generally have a larger power output, below the decimeter (finger