I have been reading and doing the steps on this webpage of GNURadio : https://wiki.gnuradio.org/index.php/Guided_Tutorial_PSK_Demodulation
In the middle of the page, there is a section: "Using the Polyphase Clock Sync Block in Our Receiver". It has a flowgraph to showcase the usage of polyphase clock synch block. I made a flowgraph by copying every single block shown in the flowgraph (I think so). I ran the simulation, but the result I get is completely different from the result the section shows.
I have attached my flowgraph and the flowgraph of the tutorial plus my result and the tutorial's result, respectively.
Why isn't my result similar to the result of the tutorial? I just took the parameters from the tutorial one by one. I can't understand why mine doesn't work. The polyphase synch block has altered the constellation in amplitude while has not recovered the timing. Pure corruption?!?