Get amplitude values for specific frequencies

msa

3 Posts

Mitglieder

#1 · 16/03/2023, 15:53

Hello,

i want to analyze a device which has a transmitter (868Mhz).

To see the spectrum around this frequence i thought i have to set the startfrequence to 800Mhz and the stop frequence to 950Mhz.

Now, if i start the device and collect some data, i got a float array but don't know if this is the amplitude value or for which frequence this values are.

How can i get data like scannedFrequence and its amplitude value?

Thanks & greetings from germany.

Msa

fw_dev

33 Posts

Mitglieder

#2 · 16/03/2023, 16:12

Please see https://github.com/Aaronia-Open-source/RTSA-API-Samples/blob/main/SweepSpectrum/SweepSpectrum.cpp for reference

mm_dev

167 Posts

Mitglieder

#3 · 16/03/2023, 16:32

As a general rule: the main array will only contain measurement values, frequencies for those need to be calculated from the header values (startfrequency, spanfrequency, stepfrequency, num and size) by the user.

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msa

3 PostsTopic Author

Mitglieder

#4 · 21/03/2023, 08:12

Thanks for your answer.

Could you provide some example calculation for the frequency of a measurementvalue from the packet float array please ?
Because i already tried to calculate but as result i got e.g. three sweeps in the packet and the measurement values are all the same for three sweeps. (start frequency sweep 1 = start frequency sweep 2 = start frequency sweep 3) and i don't think that this is correct.