Horita SAG-50

The SAG-50 overlays one of eight safe action and safe title borders, with optional center cross, over incoming video so that the graphics and other information can be correctly positioned within the picture. The SAG-50 can also overlay video image with dot and crosshatch test patterns (with image center indicators) for lining up camera graphics or performing convergence and centering adjustments on single monitors or for setting up video walls.
An added feature not found in any other safe area generator, is the ability of the SAG-50 to output an oscilloscope "line trigger" signal and display an intensified line with a digital readout showing its actual line and field number on the video monitor.
Safe action and safe title overlays are fixed at the SMPTE RP-27.3 standards of 80% and 90% of the scanned image area.
Dot/crosshatch convergence patterns are 15 lines/dots across, by 13 lines/dots top to bottom.
Both patterns have special "center screen" pattern for locating exact center of scanned image.
Intensified line and trigger can quickly be changed from line 10 through 262, and the field can be selected as field -1, field -2, or both.
This provides a very accurate method of identifying the exact location of and/or placing graphics in the picture, measuring text height in line numbers, etc.
Trigger output signal transforms an ordinary oscilloscope into a precise piece of video test equipment capable of observing and identifying individual video lines of either or both fields for viewing VITS test signals, VITC time code, head switching points, etc.