I am using fmcomms2 project (2019r1 and No-OS). I am performing an external loop back test (TX and RX connected with coaxial cable). During the test i am streaming 1 MHz of complex sinusoid and changing the LO frequency(TX and RX synthesizer) using fast lock method.
When i look into the demodulated signal i see fluctuations in received signal amplitude and dc offsets whenever i change the LO frequency as shown in image below,
The demodulated signal is mathching in frequency (1 MHz).May i know the reason why is it so and how can i avoid it.
The LO frequency change is only 10 MHz at each step and carrier frequency is 100MHz.
added extra details
[edited by: Amaresh at 5:57 PM (GMT -4) on 2 Nov 2021]