1. I would like to implement a program that uses two X4A04 and Raspberry pi to determine the position when an object appears. When I used a single radar sensor, there was no problem in detecting the distance of the object. However, when two radar sensors were used, it was confirmed that it did not work properly. The first thing I considered was setting the distance between the two radars to 50 cm. The second consideration was to set the center frequency to 7.29 GHz for one radar and 8.748 GHz for the other. But the results of the program did not change. So, I want to know what to consider when using two radar sensors. 2. I wonder if it has the ability to stop and restart the radar sensor. I thought that if you set the fps value to '0' through x4driver_set_fps () function, the radar would stop working. And then I thought radar would work again if I set the fps value to something other than '0'. But it was not. How can I stop and then restart the radar?