Whatever it is radar, eccm equipment, communication equipment or instrument, frequency source with high stability is needed to guarantee the quality of carrier signal.
无论是雷达、电子对抗，还是通信、仪器设备等都需要高稳定度的频率源，以保证载波信号的质量。
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The advantages of this system are that the equipment used is simple, that the carrierfrequency is stable and that no affects of phase-error accumulation exist.