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Measurements of radiated emissions in the frequency range up to 1 GHz are performed in a semi-anechoic chamber or on open area test sites (OATS). Such measurements are very time consuming as according to CISPR and FCC Standards the measurements have to be performed at several antenna heights and all angular positions of the device under test. In the past the total test time was reduced by performing pre-scans with peak detector and short dwell times and final maximization carried out at individual frequencies only. During the pre-scan procedure overview measurements are performed to search for the frequencies with maximum emissions. A list of suspicious frequencies (peak list) is generated. Then at these frequencies the final measurement is performed in single frequency mode with longer dwell times.
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The worldwide fastest EMI Receivers TDEMI eXtreme (short: TDEMI X) of GAUSS INSTRUMENTS with a frequency range from DC– 40 GHz, which is 64000 times faster than a traditional EMI Receiver, now also provides the lowest noise floor in comparison to any EMI Receiver with a range of 40 GHz..
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The new benchmark for your product pre-certifications. The new TDEMI Mobile+ (TDEMI M+) receiver series of GAUSS INSTRUMENTS is a very compact and robust designed instrument for optimum mobility and outdoor use as well as on developers workbench in your lab. It provides a vast variety of functionalities.
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By the TDEMI Click Rate Analyzer (Option CLICK-UG), which is full compliant according to CISPR14 by the way, a fully integrated click rate analyzer, measuring at all four frequencies (150 kHz, 500 kHz, 1.4 MHz, and 30 MHz) simultaneously, was released for the ultra-fast TDEMI Receiver Series of GAUSS INSTRUMENTS. Hereby the overall test time could be reduced by several factors in comparison to a traditional EMI receiver which is measuring each frequency point sequentially.
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Measurement of disturbance power is carried out with an absorbing clamp in the frequency range of 30 MHz – 300 MHz. It is an alternative test method to radiate emission measurements. Therefore, the maximum emission has to be found and recorded which is received by the absorbing clamp moved along the slideway. Usually a frequency search is performed in the first step. The following measurement of the maximum is performed with the Quasi-peak detector at single frequency points. Typically the test receiver was set to a single frequency and the absorbing clamp was shifted till the maximum emission was found.