Xr3 code modulation; pulse rate input 1 khz; modulation ratio 2: 1 to 5: 1; remote control: time code generator; monitors time in hours, minutes, seconds; power requirements: vac, 105 to 400 hz, 50 to 400 hz, 1 phase; 17.000 in. Lg x 19.999 in. W x 1.750 in. H; rack mounted; designed for surface ship or shore use