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If you are still not on the flat-panel monitor bandwagon, you must be considering doing it soon. And, if not, then you should! Its the trendiest peripheral to own. It represents power, fashion and all things vivacious and happening. Until you replace your CRT display you would not realize how much you detested that eyesore! But before you spend your hard earned money, getting to know the object of desire will do you wonders.

Buying information:

1. Flat panel monitors use interfaces – analog or digital. The newer models have digital interface but an all-digital configuration costs a good deal more. If you are purchasing an analog flat panel, you will have to attach it with a digital interface to your video card with a digital out jack to mainstream the signal.

If you are planning to buy a digital interface, you need to investigate its compatibility. There are several digital interface standards available today-Plug and Display (P&D) from the Video Electronics Standards Association (VESA), Digital Flat Panel (DFP) from the Digital Flat Panel Working Group, and Digital Video Interface (DVI) from the Digital Display Working Group (DDWG).

The P&D interface is the oldest of the three criteria and chances are your new model wont sport this convention. Support for DFP standard is seen across many hardware vendors. The DVI standard is the newer and the most popular. Do your research and whichever standard you chose, you need to match its ingredients that include cables and video cards!

2. Pixel-refresh response time: In a LCD monitor, the time required to switch from light to dark objects or vice versa, is referred to as Pixel-refresh response time. If the response time is poor (more than 40ms), you may see ghosting effect, i.e., the image seems to remain longer on the screen than it actually is!

Whereas in a text environment this would hardly matter, in a gaming or media centric environment the effect could be a nuisance. More inexpensive models give more ghosting than their pricey counterparts. Also, pixel-refresh response time is not articulated on the monitors. You need to watch thoroughly to judge the performance of each model.

3. Viewing angle: One problem with a flat panel monitor is its viewing angle. Laptop users must have experienced this problem. Moving away from the monitor in any way causes the monitor to black out! Various models offer different viewing angles horizontally and vertically.

Find the one better suited to your funds! In any case, for a home PC, the viewing angle doesnt make much difference but if the monitor is going to be used for official presentations then it should have viewing angle of at least 120 degrees horizontal and 100 degrees vertical. Also, ask for accessories like pivoting frames.

4. Size: bigger is better, but with flat panel, remember 15-inch screen gives you the experience of a 17-inch CRT monitor. If you can shell out for 17-inch flat panel, by all means, go for it, if not, a 15-inch screen should not be a downer.

Other things to check when buying a flat panel are guarantees and warranties. A three-year warranty is recommended. People change the monitor settings in stores and while purchasing; make sure that you check the piece adequately. You now have the basic information; all you need is time to check out the market.

Fiber optic communication systems have become more of a challenge for network operators to strategically and promptly keep them running at top performance in order to meet intense demands for reliable services. Many operators will go through a rigorous fiber optic training course. As the fiber optic communication systems evolve, there become newer and more complex parameters to monitor, more links to install and maintain, and more expected disruptions to track down. A new function in the primary test tool for fiber optic cable plants is the Optical Time Domain Reflectometer, or OTDR. The OTDR is an instrument that uses the inner back scattering properties of an optical fiber to detect and categorize its condition by sending high power pulses of laser light down into the fiber and capture the light that is reflected back. This new tool is of great significance for fiber optic technicians. Fiber optic patch cables are another way to provide the correct amount of light.

Software enhancements are reshaping OTDR testing with potent new data processing capabilities that allow even the least experienced operator to analyze the fiber optics quickly and completely, and to find subtle features easily. While OTDR concepts are basically simple, precise measurements can be complicated. Reflected fiber optical power is a tiny fraction (of basically one-millionth) of transmitted pulse power that eminently varies with wavelength, cable length, fiber optic backscatter co-efficient, along with splice and connector attributes.

Measurement parameters of fiber optics under test have to be carefully selected based on mode, length and attenuation, in order to optimize fiber optic measurements with an older, manual OTDR. The optimal parameters for all fibers, in exception for the shortest optical fibers, vary in relation to the distance of the event from the instrument. The newest OTDR instruments integrate software programs that automatically detect and configure the optimum test parameters and show results in simple formats.

Most fiber optic cables require multiple OTDR measurements by using different parameters to completely and accurately characterize their property ties. These types of tests can take more time than is acceptable during a network emergency or a lengthy commissioning process. When troubleshooting the close-range resolution versus long-range visibility, several sets of waveforms must be acquired by using different OTDR settings as often as necessary. After completing the first scan by using a short-duration optical pulse, the next scan will use a longer-duration optical pulse to provide additional optical power to test further along the optical fiber.

Newer OTDR’s incorporate built-in testing programs that automatically characterize the fiber optics in a sequential manner, starting from the instrument-to-fiber connection and working outward. Such programs automatically determine which parameters need to change, based on criteria like signal-to-noise-ratio, length, total loss and elapsed time. They may also increase the number of averages, change the filtering, or adjust the gain of the detection circuitry in order to optimize the test results for each specific cable segment. Many other software enhancements have been introduced to the acquisition , analysis and archiving of fiber optical test data, making the OTDR an even more valuable asset for technicians to meet the challenges of supporting fiber optic cable plants.