Plot test pattern (P+)

You can use the P+ command to generate a simple test pattern and verify that the display software works properly.

Figure 1. Test pattern display
  1. In the TTY monitor, type: P+

    This prints the message Plotting Test Pattern... on the TTY and then produces the plot shown in the following figure. The display is an overlay of the following strokes:

    • Bottom line
    • Middle line
    • Top line
    • Line sloping up
    • Line sloping down
    • Sine wave pattern that changes phase with each plot so that it appears to radiate from the left side of the display.
  2. When you are satisfied that the plot is drawn correctly, type Q or press ESC to return to the TTY monitor.