Menu for selecting the main receiver settings (receiver mode). The upper window of the split screen display shows the continuously updated level values for the selected detectors (max. three simultaneously) and the set measurement frequency. The lower window shows the measured emission spectrum using the SCAN table settings. Up to three traces with a maximum of 1 million measurement points each can be simultaneously active.
In receiver mode, the R&S®ESPI is tuned in fixed frequency steps in line with the settings in the SCAN table. The SCAN table can be programmed for a maximum of ten frequency subranges with independent parameter settings (e.g. start/stop frequency, step size, measurement time, resolution bandwidth, input attenuation). Each time a scan is launched by entering a START and STOP frequency, the parameters that are preset in the SCAN table are loaded automatically. This always ensures reproducible and standard-compliant measurements.
All parameters for the final measurement at the critical frequencies can be configured in a submenu. The final measurement frequencies are determined either for the absolute peaks or as subrange maxima. The relative magnitude of a disturbance level, its offset from the limit value (margin) and the maximum number (1 to 500) can all be set. The final measurement is performed either fully automatically or interactively.
The R&S®ESPI allows precise evaluation of all measurement traces using marker and zoom functions. The MARKER TRACK and TUNE TO MARKER functions link the frequency tuning and numeric level measurement to the marker position on the trace. Final measurements at the critical frequencies determined in this way can be performed more quickly and easily.
In analyzer mode the R&S®ESPI provides comprehensive measurement capabilities from the standard repertoire of a high-quality spectrum analyzer including many customized analyzer functions that help to significantly expand the range of possible applications beyond EMC measurements. For example statistical signal analysis using the complementary cumulative distribution function (CCDF) provides the precise CCDF trace, average and peak power as well as the crest factor over one million measured values.