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高性能、轻重量、结构紧凑和高可靠的战术通信设备有着严格的要求。在电子调谐问世之前,要想制造出满足特定要求的实用设备,必须使这些参量之一或全部折衷化。但是现在可以通过电子调谐电路,使设备全固体化,无需复杂的机械调谐而使战术通信设备能制造得更小和更轻,并可提高系统的可靠性和达到减少体积要求而又不牺牲工作参数。采用电子调谐,设备性能特性可能和车载式设备的一样高,而其重量和体积则和背负式设备的差不多。这样,用同一的设计就能满足背负式和车载式设备的要求。由于机械零件的简化及调谐元件的固体化,从而可大大提高系统的可靠性和维护性。本文讨论了采用电子调谐的战术通信的要求、设计方法、问题所在及其解决方法。特别着重讨论了调谐器和合成器设汁的线性问题、温度补偿、电源要求和调谐回路的统调方面。本文还略述电子调谐应用于典型的战术通信设备(AN/PRC一70收发信机)的一个方框图与典型电路。最后将测到的性能数据列于表内。
High performance, light weight, compact and highly reliable tactical communications equipment has stringent requirements. Before the advent of electronic tuning, one or all of these parameters must be compromised in order to create a functional device that meets specific requirements. But now electronic tuning circuits can be used to make the device fully solidified without the need for complicated mechanical tuning to make tactical communications devices smaller and lighter and to increase the reliability of the system and reduce the volume requirements without sacrificing work parameter. With electronic tuning, the performance characteristics of a device may be as high as those of a vehicle-mounted device, and its weight and volume will be similar to that of a piggyback device. In this way, with the same design to meet the needs of piggyback and car-mounted equipment. Due to the simplification of the mechanical parts and the tuning of the components, the reliability and maintainability of the system can be greatly enhanced. This article discusses the requirements, design methods, problems, and solutions to tactical communications using electronic tuning. Particular emphasis is placed on the linearity of tuners and synthesizers, temperature compensation, power requirements, and tuning of tuning loops. This article also outlines a block diagram and typical circuit of electronic tuning applied to a typical tactical communications device (AN / PRC-70 transceiver). Finally, the measured performance data is listed in the table.