BSC devellopped a DRFM front end filter bank, with 3input and 3outputs allowing fast selection of the IF bandwidth going into an out of the DRFM core.  It also permits a fast loop back path for re-transmit of the analogue IF signal.  It fits in a single slot VME64 rack and is FPGA controlled so can be configured to other users control logic.  It could also be used as the IF preselector for  multiple narrowband receivers…