二、高频振荡器振荡器是信号发生器的心脏.虽然组成振荡器的电子管和回路的结构,由于频率范围不同而差别较大,但是,对不同频率范围的振荡器却有一些共同的要求,如不容许有死点和死区,振幅和振荡频率应尽可能的稳定等.现在就不同频率范围的振荡器进行介绍. 30兆赫常作为高频的上限,但利用分频段的办法,一个振荡器的频率范围通常可自数十千赫至50～60兆赫.适用于这段频率范围的振荡器电路较多,如哈 Second, the high-frequency oscillator Oscillator is the heart of the signal generator Although the composition of the oscillator tube and loop structure, due to the different frequency range and larger, but there are some common requirements for different frequency range of the oscillator , If not allowed dead and dead zone, the amplitude and oscillation frequency should be as stable as possible, etc. Now introduced in different frequency range of the oscillator. 30 MHz often as the high frequency limit, but the use of sub-band approach, a Oscillator frequency range usually can be from tens of kilohertz to 50 ~ 60 megahertz. Suitable for this frequency range of the oscillator circuit more, such as Kazakhstan