• Tuner channels can be any positive number including 0. However, tuner channels are validated according to the region.

  • Region can be any character string, but there must be a corresponding file (character_string.RGN) in the \MMOS2\REGION subdirectory. A partial list of regions includes:

      USA.RGN

        USA Air
      USACATV.RGN
        USA Cable
      CCIR.RGN
        Western Europe CCIR Air
      CCIRCATV.RGN
        Western Europe CCIR Cable
      AUSTR.RGN
        Australia
      JAPAN.RGN
        Japanese AIR
      JAPANCATV.RGN
        Japanese Cable
      New regions can be created, allowing one to expand the regions supported or to block out undesirable channels.
    
      MCI_DGV_FINETUNE_PLUS and MCI_DGV_FINETUNE_MINUS are mutually exclusive.
    
      Channel and region do not have to be set every time; values will be remembered. If finetuning is necessary, it will have to be reset every time the channel or region is reset.
    
      MCI_DGV_FREQUENCY temporarily overrides the currently set channel and region. The next MCI_SETTUNER command without MCI_DGV_FREQUENCY set will revert back to the previously set channel and region.
    
      If the region is set without a channel, the lowest channel available for that region will be used.

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