interpolation effect in the frequency domain of the spectrum analizer

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yef smith

Joined Aug 2, 2020
244
Hello,When we interpolate by 2 that means that our frequency axes shrinks by 2 as i know from the simple theory
But we i look at a system from a real DAC as shown in the spectrum analizer photos bellow.
I have an I/Q modulated signal of 5Mhz baseband going into 2300 mixer frequency and the signal is intepulated by 2
I get a very complex behavior shown bellow.
I made marker table on it the photos.
maybe the system is not exactly acts by the numbers i said..
How can i interpret this spectrum analizer photos and see the intepolation effect in it?
Thanks.


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