The VHF/UHF Classifier Code Check is a versatile analysis tool for the classification of unknown, possibly double-modulated signals and the determination of the protocol (mode) in use. The CCC combines a wideband classifier with a table-based mode check and an advanced code check. The CCC will attempt to process all signals within a bandwidth of up to 96 kHz depending on settings. As is obvious from its name, the VHF/UHF Classifier Code Check primarily addresses the requirements for the analysis of signals from 30 MHz to 3 GHz, but it will of course work with signals in other frequency ranges if they fall within the bandwidth, and fulfil the other criteria, used by the CCC processes.