Gtco CR 1212 - Users Guide Manual de usuario descargar pdf (Pagina 46)

CR 1212 46

Appendix A Specifications

Physical Description

Approximate physical dimensions:

Width

Length

Maximum Height

Weight

16 inches (406 mm)

17 inches (432 mm)

1.3 inches (33 mm)

7 lbs. (3.2 kg) maximum

Power Supply Specifications

The CR 1212 power supply for the RS-232C configuration is specified as:

 Input: 120 VAC +7%, -13%, 58 to 62 Hz

 Output: 5 VDC at 225 mA, less than 50 mV ripple, +/-5% regulation, rise time less

than 100 milliseconds

Operating Specifications

Standard Accuracy: +/-0.050 inches (1.27 mm) or better

Accuracy is how closely a point’s actual location is determined.

Active Area: 12 inches by 12 inches (305 mm by 305 mm) approximately

The area of the tablet that senses the stylus/cursor location and where valid reports are

obtained.

Jitter: Stylus or cursor: +/-1 count of resolution

Jitter is the different in values collected by the graphics tablet for the same point (for

example, 200, 201 and 202). Jitter can be caused by electrical noise from environmental

sources or from the tablet’s analog-to-digital conversion circuitry. Noise affects the signal

that identifies a point. Jitter is measured as one unit of the resolution.

Proximity: 0.5 inches (12.7 mm) approximately

Proximity is the maximum distance the stylus/cursor can be held above the active area and

report a valid position.

Resolution: Up to 508 lpi (lines per inch)

Resolution is the “fineness” of detail that the tablet can distinguish. Resolution is expressed

in lines per inch (lpi) or lines per millimeter (lpmm).

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Gtco CR 1212 - Users Guide Manual de usuario Pagina 46