Regarding to analog pulse counting by using DRS4 Rev.2.0 board, you have said that "There is a way to perform the counting dead time free, but that requires the V4 board, which has a hardware comparator on all four channels (The V2 board has only one comparator and a multiplexer). The output of these comparators go directly to the FPGA, which can then trigger on these signals. In principle one could implement a hardware counter in the FPGA, which works practically dead time free. But this requires a new firmware which has to be written. Either you do it yourself using the Xilinx development tools, or you wait until I find some time to implement this, which could take a couple of weeks or even months."
I am interested in it. I have DRS4 Rev.2.0 board. I have FPGA and Microcontroller firmware for this board. How can I implement this concept of counting pulses?