Preh MCI 15T manual Glossary

Power Dissipation	MCI 15T C2RT2	21 W max.
	MCI 15T C1RT4 &	40 W max.
	MCI 15T C2RT4
Temperature	Operating	0°C to 40°C
	Storage	-30°C to 60°C
Humidity	Operating	20% to 80% non-condensing
	Storage	5% to 90% non-condensing
External Connections	Power	External +12VDC power pack, 5.5mm
		miniature jack
	Audio	Standard 3mm Stereo Jack
	Video	HD15 (VGA)
	Touch Interface	Dual Interface USB/Serial Controller;
		DB9F 9-pin connector (serial interface);
		Standard USB series “B“ receptable
		(detachable USB cable)
Connectivity	MCI 15T C2RT4	2 x Standard USB series “A“ receptacle
	MCI 15T C1RT4	(detachable USB cable)
POS Options	Magstripe Reader	3 Track Reader with Power and Error
		Indicator Light (Only MCI 15T C2RT4
		and MCI 15T C1RT4).
	Customer Display	2 x 20 VFD Display with Dual Axis (tilt
		& swivel) Movement (Only MCI 15T
		C2RT4 and MCI 15T C1RT4)
Additional features	Power switch state memory
	Digital on-screen display (OSD)
	Rubber Wedge Sealed touchscreen
	Hidden, software lockable controls
	Direct access to brightness, audio mute, and video auto adjust
	functions (bypass OSD)
	Auto-Sensing Brightness Adjustment
	Removable base
	75mm VESA mounts on display chassis
	Top or bottom access to countertop mounting holes
	Kensington lock connection on chassis
	Broad range of vertical tilt (-5º to +90º)
	Two built-in 1W baffled speakers
Product Agency	Approvals: UL, cUL, TUV(GS), FCC Class B
Warranty	3 Years warranty (In the US)

Glossary

AMTFT: Acronym for Active Matrix Thin Film Transistor. This is the type of liquid crystal display panel used in essentially all computer flat panel displays today.

Calibrate: For touchscreens, “calibrate” is the common term for the process that is really “video alignment.” A touchscreen and its controller have a coordinate system that are usually not identical to the coordinate system of the video display of the host computer. By displaying reference points on the MCI Touch Monitor (through the calibration program) and touching those reference points, the MCI Touch Monitor coordinate system is scaled to that of the computer.

Color temperature: Color temperature is a simplified way to characterize the spectral properties of a light source, and is the temperature you would heat a theoretical “black body” source to radiate light of the same visual color. For example, “low” color temperature, like 3200°K, implies warmer (more yellow/red) light, while “high” color temperature, like 9300°K, implies a cooler (more blue) light. Daylight has the 3200°K temperature mentioned near dawn and evening, and a higher one during the day. The standard unit for color temperature is the Kelvin (K).

Contrast Ratio: The ratio of the luminance of the display of a full white image to a full black image. This parameter is useful in determining the relative sharpness of two displays-a higher contrast ratio usually implies a sharper image, especially when text is displayed.

Controller or Touchscreen controller: The electronics that actually process the touch on the touchscreen and sends out a digital representation of that touch to the host computer.

Emulation: As used in display technology, emulation mode means an image displayed at a non-native resolution. For your Preh MCI Touch Monitor and other 15” monitors, the common emulation modes are 800 x 600 and 640 x 480. In emulation modes, a monitor cannot perfectly display the image sent from the computer when the monitor pixel to image pixel ratio is not an integral multiple.

Hub or USB hub: An electronic circuit that combines several USB signals into one.

Illuminance: The measure of how much luminous flux per unit area that impinges on a particular surface, or how bright a point source of light appears to the eye. It is measured in footcandles or in lux.

Kelvin: The scale of temperature measurement that begins at absolute zero. The increment of temperature that one Kelvin represents is the same as that of the Celsius scale, but the scale starts at -273.16°C. Thus 293°K is about 20°C or 68°F.

Keyboard emulation: Produces the same output as a keyboard, or a “keyboard wedge” magnetic stripe reader.

Keyboard wedge: An MSR unit that connects to a computer keyboard port with a cable that also connects the standard keyboard, thus a keyboard wedge.

LCD: Acronym for Liquid Crystal Display. The most common technology used in flat computer displays today. “Liquid crystal” molecules (a very complex chemical engineered for this function) sandwiched between a combination of flat glass color filters and polarizers, pass or block light in response to electrical signals applied by the display electronics. The result is a very sharp,