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a version without integrated antenna is also available.key factsthe r&s®hf907dc shf directional antenna with down converter combines two key features into a single product:it extends the frequency range of portable receivers (e.g. r&s®pr100) up to 18 ghzit allows localization of transmitters or interfering sources by utilizing the distinct directional pattern of a log.- periodic antenna.

monitoring antennas for mobile and stationary use, providing complete coverage of the frequency range from 900 hz to 40 ghz.

便携式有源方向性天线，可跟踪信号发射机以及干扰源。

r&s®pr200 便携式监测接收机——高性能手持式设备，适用于频谱监测。它能够可靠地检测、分析和定位 8 khz 至 8 ghz 的信号。