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Aliens pollute the universe

13.02.2010

It is generally believed that civilizations existing in space can impersonate "radio noise" in the VHF band. But the history of the development of terrestrial technology has shown that the era of free radio emission in all directions is relatively short: only half a century has passed since the beginning of the widespread use of television, and television signals mainly began to propagate either via cables or through satellites that radiate strictly to the Earth.

American astronomers propose to look in space for traces of synthetic compounds produced only by a fairly advanced civilization. They can be found by infrared radiation. For example, a particularly sensitive infrared telescope is able to detect Freon-type compounds in the planet's atmosphere, even if their concentration is only one part per trillion.

Many other synthetic air pollutants also have a characteristic infrared spectrum.

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The R&S ZNH is a handheld vector network analyzer that allows you to identify faulty RF cables and communication system components. The R&S ZNH can also measure microwave components in the laboratory and in the field up to 26,5 GHz. The R&S ZNH is a reference instrument for standard measurement tasks such as cable and antenna analysis and full two-port S-parameter measurements. The analyzer has built-in receiver step attenuators on both test ports, which prevents them from possible overload. The R&S ZNH four-receiver architecture supports the Unknown Jumper Calibration Method (UOSM). Best-in-class RF performance and analyzer features such as low path noise (0,0025 RMS), 100 dB dynamic range, 0 dBm output power, and 16001 measurement points make the R&S ZNH ideal for launching and maintaining communication and research systems microwave components.

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