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This project shows how to use the RFB VSS Carrier to IM3 ratio measurement (dBc). Please read the measurement help for C_IM3.
The graph "C_IM3 dBc shows the ratio of the carrier power to the third order itermodulation product.
If you look at the 2nd row of the graph "P_node of signal and IM3" you will see the 2nd column is -41.302dBm and that the 3rd column is 2.849dBm. -41.302dBm is the power level of the IM3 product and 2.849dBm is the power of the main signal (carrier).
2.849 - (-41.302) is IM3_dBc.
Also you can see a plot of power in vs. power out.
System Diagram - C_IM3 measurement
Graph - P_node of signal and IM3
|x Data (Text)||DB(|P_node(TP.IN1,TP.OUT1,3,1,0)|)[1,6] (dBm) C_IM3 measurement IM 3 Product Node Power, dBm Freq = 1 GHz PWR = -7||DB(|P_node(TP.IN1,TP.OUT1,0,1,0)|)[1,6] (dBm) C_IM3 measurement Signal - peak if DC, rms otherwise Node Power, dBm Freq = 1 GHz PWR = -7|
Graph - C_IM3 dBc
|DB(|C_IM3(TP.IN1,TP.OUT1,0,2,1,0)|)[1,6] C_IM3 measurement Text||DB(|C_IM3(TP.IN1,TP.OUT1,0,2,1,0)|)[1,6] (dB) C_IM3 measurement Absolute IM3, dB Freq = 1 GHz PWR = -7|