HOW DIGITAL COMPACT RECEIVER FOR RADIOMONITORING

A typical R&S EM200 application is primary/secondary operation together with a wideband monitoring receiver like the R&S. If, for example, the R&S detects an interesting emission, the pertinent frequency range can be transferred to a connected R&S EM200 for permanent monitoring and precise analysis. Like any radio monitoring receiver, the R&S EM200 can be used for direction finding tasks, for instance as a single-channel direction finder in combination with a vehicle roof antenna or as a component in a large-scale radio location system. It can use the angle of arrival  method, the time difference of arrival method or a hybrid approach. Since it is a system instrument, the R&S EM200 is designed for easy integration into receiver networks that are managed using software such as R&S RAMON and R&S ARGUS. Precise timestamps for each data packet facilitate correlation with data from other receivers in the network. Regulatory authorities want to know at all times what is going on in the spectrum, whether all transmitters are complying with license terms. Their task is made more difficult by the fact that a wide range of radio technologies are intensively using all available frequencies. The new R&S EM200 digital compact receiver helps them maintain an overview, either as a standalone instrument for stationary or mobile use, but especially as a component in large monitoring and direction finding systems. The ½19" wide receiver scans the range between 8 kHz and 8 GHz at up to 40 GHz/s and does not miss any spectral event within its 40 MHz real-time bandwidth. This focal area, in which time domain analysis is also possible, can be output as an I/Q data stream via the optional 10 G bit interface, analyzed online on a connected PC using the R&S CA100 software or recorded for later evaluation, for example with the R&S DWR100 I/Q recorder. One of the innovations of 5G mobile communications is the use of millimeter waves. In line with the 3GPP standard, the 5G frequency range 2 currently comprises two blocks: 26.5 GHz to 29.5 GHz and 37 GHz to 43.5 GHz. National regulators decide which bands will actually be used in a country. Unlike in the sub6 GHz frequency range where conducted tests are possible, OTA test facilities are required for FR2 products. For non-signaling tests, developers and manufacturers can now use the R&S CMPQ test system. It consists of the R&S CMQ200 shielding cube, the R&S CMP200 tester and an R&S CMPHEAD30 remote radio head. The main field of application is mass production of 5G products. Thanks to its very flexible configuration, it certainly can also be used for preproduction measurements. The R&S CMP200, controlled by the cross-product R&S CM squares 5G test software, generates and analyzes standard-compliant signals up to 20 GHz. For higher frequencies, the radio heads (24.25 GHz to 31.8 GHz or 37 GHz to 43.5 GHz) take over. Up to three radio heads can be operated in parallel. This allows one R&S CMP200 to simultaneously manage multiple shielding cubes – a welcome feature in production. By the way, the cubes are not limited to 5G applications. They are suitable for all technologies up to 77 GHz.