Extron electronic 3200 Series, 6400 Series manual PCB Printed Circuit Board

Appendix A • Reference Information

Output – The product of an operation by a device going to some external destination, such as another device, a video screen, image or hard copy.

PAL – Phase Alternate Line – The phase of the color carrier is alternated from line to line. It takes four full pictures for the color horizontal phase relationship to return to the reference point. This alternation helps cancel out phase errors, the reason the hue control is not needed on PAL TV sets. PAL, in its many forms is used extensively in Western Europe.

PCB – Printed Circuit Board

Peak-to-Peak– abbreviated p-p– The amplitude (voltage) difference (as displayed on an oscilloscope) between the most positive and the most negative excursions (peaks) of an electrical signal.

Peaking – A means of compensating for mid and high frequency RGB Video Bandwidth response in data monitors and projectors and for signal losses due to cable capacitance. When using the Peak enhancements, use the following guidelines for proper output settings: Use 50% with all computer frequencies between 15-125 kHz at any cable length. Use 100% with high frequency computers of 36 kHz or higher with cable lengths 75 feet or greater.

Pincushion – The inward or outward (curved) appearance of the edges of a display.

Pin-out– An illustration or table that names signals, voltages, etc. that are on each pin of a connector or cable.

Plenum Cable – Cable having a covering that meets the UL specifications for resistance to fire.

PLUGE – Picture Line Up Generation Equipment – This is a name of a test pattern that assists in properly setting picture black level. PLUGE can be part of many test patterns. The phrase and origination of the test signal are both credited to the BBC.

Power – Electrical – The dissipation of heat by passing a current through a resistance. Measured in Watts (W), it is expressed by Ohm’s law from the two variables: Voltage

(E) and Current (I). i.e. P = I2xR, or, P = E2/R or P = ExI

Resolution – The density of lines or dots that make up an image. Resolution determines the detail and quality in the image.

A)A measure of the ability of a camera or television system to reproduce detail.

B)In video, generally called horizontal resolution. It can be evaluated by establishing the limit to which lines can be distinguished on a test pattern. A larger resolution value means a broader frequency band of the video signal.

C)A measure of the greatest amount of detail that can be seen in an image. Often incorrectly expressed as a number of pixels in a given line; more correctly it is the bandwidth.

RGB – Red, Green, Blue – The basic components of the color television system. They are also the primary colors of light, not to be confused with Cyan, Magenta, and Yellow, the primary pigments. Also called the “Additive Color Process”.

RGB Video – A form of color video signal (red, green, blue) distinctly different from the composite color video used in standard television sets. RGB can be displayed only on a color monitor that has a separate electron gun for each of these primary colors. Some color television sets use only one gun. RGB monitors are noted for their crisp, bright colors and high resolution.

RS-170A– EIA technical standard NTSC color TV.

RS-232– An Electronic Industries Association (EIA) serial digital interface standard specifying the electrical and mechanical characteristics of the communication path between two devices using D-type connectors. This standard is used for relatively short range communications and does not specify balanced control lines.

RS-422– An EIA serial digital interface standard which specifies the electrical characteristics of balanced voltage digital interface circuits. This standard is usable over longer distances than RS-232. Although originally designed for use with 9-pin and 37-pin, D-type connectors, it is often used with others, including 25-pin D-types. It is also used as the serial port standard for Macintosh computers. This signal governs the asynchronous transmission of computer data at speeds of up to 920,000 bits per second.

A-9 Extron • Matrix 3200/6400 Series • User’s Manual