{
  "signal": [
    {
      "name": "pwm_A",
      "wave": "10....1..0....1..0"
    },
    {
      "name": "pwm_B",
      "wave": "10..1....0..1....0"
    }
  ],
  "head": {
    "text": "Single Edge Asymmetric Waveform, Active Low"
  }
}