The AQS/2 channel concept is the succeeding development of the well proven AQS chassis, wheareas almost all of the former configurations have been conserved, while subsequently offering new digital receiver electronic configurations including the recently developed RXAD (receiver with integrated analog to digital converter) and DRU (Digital Receiving Unit).

With the AQS/2 Chassis, the AQS channel concept has been further extended by the replacement of the former receiver units (RX-22, SADC, HADC/2, FADC, FTLP-4M, RCU) with the recently developed RXAD and DRU.