Vector vibration analyzer

http://people.ece.cornell.edu/land/courses/ece4760/FinalProjects/f2015/am859_jzw8/am859_jzw8/am859_jzw8/index.html
Because we aimed to develop a device to replace the DVF3 in an instructional lab setting, we focused on implementing only the features used during the course of an instructional lab, and streamlining common procedures. The more formal originating requirements of interest are then:

--Measure RPM from a "keyphasor" known to be a square wave from -15V to -10V
--Measure the pk-pk amplitude of two sine-like proximeter signals in the -15V to 0V range
--Measure the phase lag of two sine-like proximeter signals in the -15V to 0V range relative to the keyphasor signal
--Resettable peak hold functionality for the above which holds data at maximum amplitude
--Display of all data on a single screen to eliminate inconvenient menu structure
--Proximeter gains for each channel, tunable by knob (potentiometer)