2FSK deviation measurement.

[Val]

Hello! I have a signal hound spectrum analyzer BB60C.I need to measure a deviation of a 2FSK modulated signal at frequency 898 MHz with symbol rate 100 kHz, gaussian filter 0.5. What parameters I should use in digital demodulation option for filter settings to measure correct value of deviation?

Regards, Val

[Andrew]

The digital demodulation measurement will automatically measure the deviation. It will measure and report the avg and peak deviation. You just need to configure the symbol rate, Gaussian filter, and 0.5 filter coefficient and it should do the rest. The measurement result is in the EVM summary window.

If you can’t get this to work, email us at support@signalhound.com and we can do additional troubleshooting.

Andrew

[Val]

What is the accuracy of FSK deviation measurements?

Regards, Val

[Andrew]

We do not specify the accuracy of this measurement. It depends on a number of factors, including the signal itself, and our measurement algorithm. How much accuracy do you need? What are your test requirements? Are you coming from using an instrument where the accuracy is specified? If yes, which one? It may be that we can learn more and attempt to provide you a more concrete answer.

[Val]

Hello! Thank you for your answer. I made measurements for FSK deviation with settings you suggested and I have a correct results. I also checked this results with different spectrum analyzer and results were the same.

Regards, Val.

[Author]

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