{ 
  "signal": [ {"name": "CLK", "wave": "p.....|..."},
            {"name":"DAT", "wave":"x.345x|=.x", "data":["A","B","C","D"]},
            {"name": "REQ", "wave": "0.1..0|1.0"},
            {},
            {"name": "ACK", "wave": "1.....|01."}
]}