Quantum Data Detailed Guide on TVHatch Formats for Your Portable Generator

TVHatch (TV formats only)

Description:	The image consists of a white crosshatch on a black
	background. The lines form square boxes when the
	display’s active video area has a 4:3 aspect ratio.
	The vertical lines are made using sine-squared (2T)
	pulses (T = 125 nSec for NTSC and T = 100 nSec for
	PAL).

Test:	Convergence Adjustment
Purpose:	In order to accurately produce an image on a color
	monitor, the three electron beams in the CRT must
	meet (converge) at the exact same location at the
	same time. Lines displayed on a mis-converged
	monitor will appear as several multicolored lines
	and the transitions between different colored areas
	will contain “fringes” of other colors.
Method:	The convergence adjustments of most color monitors
	can be broken down into two main categories.
	The first set of adjustments, usually called “Static
	Convergence”, calls for aligning the three beams in
	the center of the display. The idea is to turn on all
	three guns and adjust the various magnets on the
	convergence assembly to produce all white lines and
	dots in the center of the display. The convergence
	assembly is located on the neck of the CRT. Different
	monitors and CRT types may each require their own
	magnet adjustment sequence.

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