The Bruel & Kjaer 1047 Exciter Control provides automatic sinusoidal Lin/Log sweep from 5Hz to 10kHz with adjustable sweep limits for vibration exciters. The compressor has a built-in vibration meter for constant Acc., Vel., Disp. excitation. The unit has 1 cross-over frequency and 2 vibration level limits for D-A and V-A tests.