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2GFSK and OQPSK Modulated Signal analysis in N9918A

Question asked by Sagarmistry059 on Apr 10, 2020
Latest reply on Apr 10, 2020 by Sagarmistry059

Dear Sir,

Recently we have purchased Keysight N9918A Field Fox Handheld Microwave analyzer up to 26.5GHz.

We have purchased the following options with N9918A.


-112 QuickCal
-210 Vector network analyzer transmission/ reflection
-211 Vector network analyzer full 2-port S-parameters
-215 TDR Cable Measurements


I need to utilize the 30-day free license trail of my N9918A device for the below 2 measurements using Spectrum enable option and 89600 VSA Software support.

  • EVM and Constellation diagram  Measurement analysis of 2GFSK signal
  • EVM and Constellation diagram  Measurement analysis of OQPSK signal 


I will generate 2GFSK and OQPSK signals from my inhouse Agilent E4433B with the below parameter.

As I know the importance of the Free 30 Day Trial of N9918A Device, It's a golden opportunity for me and does not want to waste it.

Till now I have no idea regarding the EVM Measurement above signals.


I need to measure EVM of the signal in N9918A just like this as shown in the below image.

It is only for OQPSK Signal.


It will be a great help if someone guides me regarding the EVM measurement process and corresponding configurations in N9918A.

So that I can utilize my 30 Day free trial.


Thanks and Regards,

Sagar Mistry,