HDG-821 is broadcast high definition pattern generators, providing the user with high quality, low cost system to produce high definition test patterns. It is a self contained product for standard 19-inch rack mounting. This unit is a multi-format generator can be used where various HD signals are required. Tri-level sync is on all analog component outputs, RGB or YUV. Sync output can be selected as Bi-level (black burst) or Tri-level.