JVC 370 SC, 330, 340 SC Test pattern of black-to-white gradation bars. The more levels

	Glossary
Gray Scale	Test pattern of black-to-white gradation bars. The more levels
	of gray scale that can be handled, the more realistic an image
	can be displayed, especially a photograph that has been
	scanned into the computer.
HDTV	(High Definition Television) Has approximately twice the
	horizontal and vertical emitted resolution of standard NTSC.
	HDTV systems are wide aspect ratio systems.

Hertz (Hz)	The standard unit of frequency. One Hz is equal to one cycle
	per second. A Kilohertz (KHz) is 1,000 cycles per second and
	a Megahertz (MHz) is equal to 1,000,000 cycles per second.
H-Grid	Test Pattern 8 with rows of white H's on screen, used as a
	focusing aid.
Horizontal Scan	The rate at which horizontal lines are made to
Frequency (H-Freq)	scan on a CRT. This is controlled by horizontal sync from the
	signal source.
Horizontal Scan	Reverses the image projection for front or rear
Reversal Jumper	projection. Located on the Horizontal Deflection Board.
Hue	Also referred to as tint. A specific color such a blue, pink or
	aqua. Hue or tint control on a display device adjusts red/green
	balance.
IDTV	(Improved Definition Television) Improvements that modify
	NTSC standards. Improvements may be at the source or the
	receiver.
Image Light Amplifier	A device that uses low-intensity images to phase-modulate a
ILA®	high-intensity light through a liquid crystal layer. It is the key
	component in producing very bright, high resolution images
	from Hughes-JVClarge-screen projectors.
Import Channel	Imports setup data from computer to projector. Store setup
	data in computer and import during setup. Useful when
	servicing the projector. See Export Channel Data and refer to
	Appendix 1 for more details.
Infrared Repeater	Used with rear projection setups. Conveys infrared signals to
	HJT Series 300 Projector, since I/R remote control signals
	cannot reach I/R windows on the projector.

Model 330, 340SC, and 370SC Service Manual