Engineer needs a way to look at freq. To see how vibration changes over time. To record a machine and see the period of spike.
- range of 0 to 20k. Div 10
- trim to the red band. Eg. 1000 hz
- from 1000 to 2000 Div 10
- trim to red band. 1800hz
- display how the freq changes. Period of it.
- ear phone to heart
- get ecg graph
- get peak and distance