{
  "signal": [
    {
      "name": "pwm_A",
      "wave": "0.1..0..1..0..1..0..1..0.."
    },
    {
      "name": "pwm_B",
      "wave": "01.....0.....1.....0.....1"
    }
  ],
  "head": {
    "text": "Pulse Placement Asymmetric Waveform"
  }
}