I'm using the FMCOMMS1 mounted on the ZC706 in order to acquire baseband complex signal.
I bypass the RF and the demodulator section of FMCOMMS1 and I provide directly in J11&J13 with complex BPSK-like signal coming from an Agilent Baseband signal generator at Zero-IF.
I've noticed a sort of high pass filtering that blocks considerably the DC component, as you can see from the attached figures.
Could you please explain that ? Is it normal ? Can you suggest any procedure to reduce it ?
In the simulation, I've generated a BPSK signal at 5 Mbps and the sampling frequency set in the board is 40 MHz.