-----------------------------------------------------------------------
  V[vovlioulsesvidthlodulation=pXϒj
-----------------------------------------------------------------------

  Prbggk܂ł̎Ԃ̈ႢŋL^܂

  Pގ͂PTCNTOOʂr
  Oގ͂PTCNQTOʂrƂ܂

  ǂݍގ͂gɂȂĂPWTʂrɃTvO
  gȂPAkȂOƂ܂

  |-------- 500us --------|
  |-- 250us --|-- 250us --|
  :                       :
  :                       :
   ____ h ____             
  |        :  |            
  |        :  |____ l ____ 
           :
  |-185us->: (<-TvO)
           :
   _____   :   _____       
  |     |  :  |     |     |
  |     |_____|     |_____|
  :           :
  :           :
  |-125-|-125-|
  |-- 250us --|

-----------------------------------------------------------------------
  wP@ł̃e[vǂݏ
-----------------------------------------------------------------------

  h^n|[g

    P`OPH ... WQTTiQj |[ga
    P`OQH ... WQTTiQj |[gb
    P`ORH ... WQTTiQj Rg[

    |[gãrbgPe[v̓ǂݍ݃f[^
    |[gb̃rbgOe[v̏݃f[^ł

  ݂̎̓|[gbɒڏނ̂ł͂Ȃ
  WQTT́urbg Zbg^Zbg R}hvg
  rbgO𑀍삵܂
  ȂƁAe[vȊÔh^nɉeĂ܂܂

  ovlłPPrbgނɂ
    |[gb̃rbgOP(H)ɂĂQTOʂro߂܂ő҂
    |[gb̃rbgOO(L)ɂĂQTOʂro߂܂ő҂

  ovlłOPrbgނɂ
    |[gb̃rbgOP(H)ɂĂPQTʂro߂܂ő҂
    |[gb̃rbgOO(L)ɂĂPQTʂro߂܂ő҂

  ovlŋL^ꂽe[vPrbgǂݍނɂ
    |[gãrbgPOPɕω܂ő҂
    PWTʂro߂܂ő҂
    |[gãrbgPPȂPAOȂOƂ

  ǂݏ̃^C~O̓NbNvZăvOō킹܂
  ԂvĎIɏĂ悤Ȃh^n͂܂

  wP͂ovl𖳎ĈʓIȋL^go܂
  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  ̏ꍇ̓{[[g悤ɂ܂
  ȂƑʂ̃mCY邻ł

-----------------------------------------------------------------------
  G~[^o͂JZbge[ṽC[Wt@Cɂ
-----------------------------------------------------------------------

  C[Wt@C̐擪SoCǵugvł
  W͂Wjgł̂ŁAkłWOOO܂Ă܂
    8000=1f40H
  Ȃ̂ŁA_vƁEEE
    40,1f,00,00,EEE
  Ȃ܂

  ToCgڂ́ASĉL̃f[^ɂȂ܂

  G~[^́Ag^kWjgŋ؂
  gȂPAkȂOPrbgL^܂
    125uSec=0.000125Sec
    1Sec/0.000125Sec=8000Hz -> 8KHz
  g^k͂lrakra֌ċL^Ă܂

  e[vt@CɂovlłPrbgL^
  OȂugkvłQrbg
  PȂuggkkvłSrbg܂

  ...................................................................

  ̕@ł̃e[vt@C͂PQOe[v
  VKoCgɂȂ܂
    120*60Sec=7200Sec
    8000Bit/Sec=1000Byte/Sec
    7200Sec*1000Byte=7200000Byte -> 6.867MByte

  TCŃuO^V[gvPrbgŋL^@
  l܂AƋNvOovl
  ͈̕ʓIȋL^Ƃ`̃\tgɑΉoȂȂ̂
  g^kL^鎖ɂ܂

-----------------------------------------------------------------------
  G~[^HuBASICe[vɏ񂾎̃C[Wt@C̓e
-----------------------------------------------------------------------

  ނQoCgu01h,23hvƂ܂

    01h = 0000 0001
    23h = 0010 0011

  X^[grbĝP
    1 0000 0001 1 0010 0011

  Prbggkɒu
       1  0  0  0  0  0  0  0    1    1  0  0    1  0  0  0    1    1
    HHLL HL HL HL HL HL HL HL HHLL HHLL HL HL HHLL HL HL HL HHLL HHLL
    1100 10 10 10 10 10 10 10 1100 1100 10 10 1100 10 10 10 1100 1100

  PUiŌ
    1100 1010 1010 1010 1011 0011 0010 1011 0010 1010 1100 1100
       C    A    A    A    B    3    2    B    2    A    C    C

  JZbge[ṽC[Wt@Cɏ܂e
    CAh,AAh,B3h,2Bh,2Ah,CCh

  ۂɂ̓wb_[t܂
  ovlł̂Prbg̕\@Qlɂĉ

