Keywords: Phase Comparison image two waves.gif en A comparison of the phase of two waveforms usually of the same nominal frequency In time and frequency metrology the purpose of a phase comparison is generally to determine the frequency offset of a device under test DUT with respect to a reference A phase comparison can be made by connecting two signals to a two-channel oscilloscope The oscilloscope will display two sine waves as shown in the graphic 2010-05-12 National Institute of Standards and Technology NIST http //www nist gov/pml/div688/grp40/enc-p cfm National Institute of Standards and Technology NIST http //www nist gov/pml/div688/grp40/enc-p cfm other versions PD-USGov Physics diagrams Waves Phase waves |