Monoscope pattern added to SNES, Genesis and Sega CD versions

The Monoscope Pattern is the traditional tool for calibrating CRTs. This version aims to provide several key elements to ensure you make informed decisions about Convergence and Deflection. Refer to your monitor service manual for procedures and safety equipment. 1. Brightness Adjustable Pattern. Electron Gun Alignment, or Convergence, is usually adjusted with a lowered brightness. Full brightness can mask issues with excessive bloom, especially if your peak white is too high. You can double check your adjustments against the 30IRE Window pattern. 2. Static/Center Convergence. The center crosshair is used to evaluate static or center screen convergence. 3. Dynamic/Edge can be evaluated with the patterns on the side of the screen. 4. Corner Convergence, corner purity and corner geometry are tightly linked. Static and Dynamic convergence must be set first before magnets can successfully correct corner issues. 5. Aspect Ratio. A new feature to help set VSIZE and HSIZE correctly is the red squares embedded in the pattern. They are calculated to display as perfect squares on a properly setup display. You may want to start with a small amount of horizontal overscan, then use a tape measure to adjust VSIZE such that the outside edges of the red square are the same in width and height. This usually achieves an amount of overscan that preserves the Title Safe Area. Some games may not adhere to those boundaries, but most do. 6. Linearity. Is the hardest part of the deflection circuit. Scrolling tests are the best way to confirm good Linearity but some compensated square elements have added to each corner where a tape measure may help get you started.