Setting Properties of the Random Vibration Study Right-click the Random Vibration study icon and select Properties. In Random Vibration Options apply the following settings: Option Description Units Cycles/sec (Hz) Lower limit 40 Upper limit 700 Number of frequency points 8 Correlation Fully correlated Click OK. Parent topicRandom Vibration Analysis of a Circuit Board Previous topic Creating a Random Vibration Study from a Frequency Study Next topic Defining Uniform Base Excitation