To Configure a Room for the BVW-75 Protocol

Set up a Room to use the BVW-75 protocol to control server channels.

Note: The BVW-75 protocol does not support clip library listing or clip loading.
  1. Launch the Mira Config application.

    You may be prompted to allow the program to make changes on the computer, click Yes.

  2. Click the RS422 tab.


  3. Click Room X Configuration and select the room you want to configure. Later you will assign this room to a channel.
  4. In the RS422 Protocol area, select BVW-75.
  5. In the Response Time area, select how quickly the server executes the Clip Play command after the Clip Load command.
    • Fast — executes the play command immediately after the load command. This is recommended when controlling the server from an external switcher.
    • Accurate — executes the play command only after receiving confirmation that the clip has loaded. This is recommended when controlling the server from an automation system.
  6. In the Edit Timing area, select a timing offset for when you are controlling the server from an external editor over serial.
    • Timecode Alignment — select the offset, in frames, of the timecode information that is sent to the editor during playout or record.
    • Source Alignment — select the offset, in frames, of the timecode information that is sent to the editor during playout.
    • Out Point Offset — select the offset, in fields, of the out-point timecode value that is sent to the editor during record.
  7. In the Video Edit Effect area, select which tracks get recorded when an external editor issues the Video Record command to the server.
    • Edit Video Track — only the video track is recorded.
    • Edit Key Track — only the alpha (key) track is recorded.
    • Edit Video and Key Tracks — both the video and alpha (key) tracks are recorded. The clip loaded into the VKA channel transport must have an alpha track.
  8. In the BVW-75 Protocol Configuration area, select specific configurations for the protocol you are using.
    • Select Disable field timecode reporting to force the server to report timecode only once every video frame. If this option is not selected, the server reports timecode every field.
    • Select the Protocol ID that you want to use (Abekas 6000, Sony BVW-75, or Generic DDR).
  9. Click on the Ch-X: list and select the room that you want to assign to the channel.
  10. Click Restart Mira. A confirmation dialog box is displayed.
  11. Click Restart Mira to restart the server application and services with the new setting.
  12. Click OK when the restart has completed to dismiss the window.