DDA55 is a digital click analyser with four parallel channels having fixed frequencies (150kHz, 500kHz, 1.4MHz, 30MHz). Each channel provided with Peak and Quasi-peak detectors, fully complies with CISPR16-1-1. The Quasi-peak detectors are designed to enable full compliance tests to be performed automatically according to EN55014-1, where requesting to test using an oscilloscope (time-domain operation). Fitted with pre-selectors that allow excellent dynamic range and precise click measurements, the WINDOWS 7 Embedded OS together with, DDA55 click analyser can be operated by remote control from a PC running our advanced EMC testing software.