1. RANDOM INTERLACE
A scanning technique commonly used in CCTV systems in which there is no external control over the scanning process. That is, there is no fixed relationship between adjacent lines and successive fields.
2. RASTER
The rectangular pattern of scanning lines upon which the picture is produced. The illuminated face of the TV monitor without the video information present.
3. REFERENCE BLACK LEVEL
The signal level that corresponds to a specified maximum limit for the black peaks of a video signal.
4. REFERENCE WHITE LEVEL
The signal level that corresponds to a specified maximum limit for the white peaks of a video signal.
5. REFLECTED LIGHT
The scene brightness or the light being reflected from a scene. Usually represents 5 to 95 per cent of the incident light, and it is expressed in Iamberts.
6. REPEATER
A type of equipment used to receive, amplify and retransmit a signal on a long transmission line.
7. RESOLUTION
A measure of the ability of a camera or television system to reproduce detail. That is the number of picture elements that can be reproduced with good
definition. It is a factor of the pickup device or the TV CRT characteristics and the video signal bandwidth.
8. RETAINED IMAGE (IMAGE BURN)
A change produced in or on the target of the pickup device which remains for a large number of frames after the removal of a previously stationary
light image and which yields a spurious electrical signal that corresponds to that light image.
9. RIPPLE
Uma variação de amplitide em uma voltagem DC causado por insuficiência ou ausência de um filtro (estabilizador de tensão).
10. RISE TIME
The time required for a sharp pulse to go from minimum to maximum or vice versa,
11. ROLL
A loss of vertical sync which causes the picture to move up or down on the TV screen.
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