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Precision CrossLine or Crosshair Generators from MicroImage Video Systems are designed for relative size measuring, positioning and size referencing. The CL5404A series is especially helpful in industrial, metallurgical or forensic applications where comparisons in relative position or size are important.The CL5404A has four (4) vertical lines moveable over the entire raster area. The lines can be set to black or white and each line can be turned off or on individually. Lines may be changed from solid to serrated with one of 13 serration settings. A lock switch is provided for each of the four controls to prevent accidental movement.Line movement can be set to fully independent, tracking mode or mirror mode with front panel switches (in line pairs). In tracking mode, one control moves the position of both lines (without affecting spacing) and the other sets the spacing between lines by moving only one line. In mirror mode, one control moves the position of both lines (without affecting spacing) and the other sets the spacing between lines by moving one line in each direction (maintaining the center point).RS232 remote control and query capability is included on all CL5404A series CrossLine models. The unit may be controlled or queried by a computer RS-232 port. The MicroImage Control Language used for this unit is simple to understand and easy to implement in custom programs, using ASCII characters. Virtually all functions can be controlled by the computer. The computer can also query the line generator for line position as well as switch and mode settings.This CrossLine model incorporates a state of the art digitally generated line system which maximizes precision and repeatability without any internal adjustments. The lines are generated with square pixels to maintain the correct aspect ratio. The high quality, sealed, multi-turn optical encoders allow the lines or box to be moved over the entire image area with maximum accuracy. The optical encoders allow a very high degree of precision without any of the jitter commonly associated with multi-turn potentiometer controls. Even after aging several years, the optical encoders maintain their performance and remain free of jitter, while the older potentiometer based technology used by others typically become noisier which appears as additional jitter. The CL5404A improves over the CL5404 with higher resolution, sealed optical encoders.