Consists of 100 mhz comb generator with 6 rf input and output connectors and 6 rf relays to control distribution of generator and external antennas to receiving system; oper pwr rqmts 28 vdc porm 5 v; o/a dims 11.2 in. Lg; 5.75 in. W; 4.12 in. H; non-shock/vibration mounting four 0.184 in. Diameter bolt holes on a 10.625 in. By 4.0 in. Pattern