#= Bigendian

CFGFRAME {
  0-1 bytes: field "SYNC" {
    0 byte: const "magic_number" u8 0xAA
    1 byte: const "ver_number" u8 0x31
  }
  3-4 bytes: field "TIME BASE" u16
  5-6 bytes: field "NUM_PMU" u16
}