{
  "signal": [
    {
      "name": "pwm_A",
      "wave": "01..0..1..0."
    },
    {
      "name": "pwm_B",
      "wave": "0..1..0..1.."
    }
  ],
  "head": {
    "text": "Dual Edge Asymmetric Waveform, Active Low"
  }
}