The Meridian DigitalRepeater indicates magnetic or true heading to 1/10th of a degree and rate of turn via a red LED bar graph.
子午线数字中继器通过一个红色LED条线图测量磁场或真是指向，误差仅为1/10度。
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In digitalrepeater, the application of digital intermediate frequency technology and realization of optical fiber transmission for distance will require for little Phase Noise of Phase-Locked Source.
An operational principle of jamming of interrupted-sampling and direct repeater based on digital radio frequency memory was introduced, and its jamming effectiveness was analyzed.