The Air Force’s 542nd Combat Sustainment Group, which is responsible for purchasing support for all Air Force electronic warfare systems, has given Northrop Grumman Systems Corp., of Rolling Meadows, Ill.,  a $25,739,773 contract to provide electronic warfare engineering services for the B-52H.  Northrop built the AN/ALR-46 digital warning receiver for the B-52, whic detects radar emissions in the 2GHz to 18GHz band, and can simultaneously identify up to 16 radar signals; and the Northrop Grumman’s AN/ALQ-155 jammer power management system, which gives the aircraft gives 360° coverage in D,E,F,G, and H radar bands.