The dual channel L band front-end consist of a FMC dual channel L band down-converter, preamplifiers and duplex filters. Each IQ down-converter has a wide adjustable bandwidth (>100 MHz), adjustable gain and two 250MHz 8 bits or 160 MHZ 12 bits or 105MHZ 14 bits multi-mode ADC's. The down-converter mode is switchable: single receiving frequency band for both channels, or dual frequency band: each channel has its own receiving frequency band. For GNSS its includes timing support, Other applications are radio astronomy and microwave digitizing back-end.