Cathode Ray Tubes or CRTs have been around for almost as long as computers. And as with computers they have progressed with time. Today, LCDs may be the coveted monitor, but CRTs continue to sell as before. If you are one of those who is looking for CRTs, here are some CRT basics you need to know:
1. Monitor Size and Viewable Area: CRT monitors are categorised by their screen size, which is equivalent to the diagonal length of the monitor. Another important term in this connection is display size. The display size is the size of the screen minus the external casing area. It is always less than the screen size. Viewable Area on the other hand, is the image display area on the screen. This is usually about an inch less than the Monitor Size.
2. Resolution: The CRT can offer multiple resolutions at varying refresh rates. Some examples are: 800x600 (SVGA), 1024x768 (XGA), 1280x1024 (SXGA) and 1600x1200 (UXGA).
3. Refresh rate: The refresh rate basically refers to how many times a monitor can refresh the image on the screen to avoid flicker and eye fatigue. This number is listed in Hertz (Hz) or cycles per second. A score of 75 Hz at the resolution you want is a good option. Don’t go for anything that is below 60 Hz.
4. Dot pitch: Dot pitch ratings refer to the size of a given pixel on the screen in millimeters. If you have a high rating, you have big dots and big dots at high resolution can create fuzzy images. A rating of about .25 mm is average.
5. Cabinet size: CRTs are bulky and take up a lot of desk space. This is something you should keep in mind right from the beginning. You should be particularly careful about the depth of the monitor, more so if your desk has a back panel.
6. Screen contour: CRT displays now have a wide variety of contours. Initially the screen was convex like a TV screen. This made it easier for the scanning electron beam to provide a clear image. As technology progressed, flat screens with rounded edges arrived. Now you have models with completely flat screens. Remember, rounded screen surfaces tend to reflect more light causing glare and eye fatigue.
CRTs have their own takers. Some gamers for example swear by them. If you are planning on buying one, keep these specifications in mind. Chances are you will not go wrong.