The contrast ratio indicates the difference in light intensity measured in cd/m2 (candelas per square meter) between the brightest white on a monitor screen and the darkest black. It is calculated by subtracting the value of the darkest black from the brightest white, then dividing the result by the darkest dark (Brightest – Darkest/Darkest). Results are typically shown in the following format: 400:1. Generally, better monitors have higher contrast ratios.
Note: Light intensity per unit of area is also known as luminance

If your standard cable channels are fuzzy or blurry on your LCD monitor when you watch them in full screen mode, unfortunately, there is little you can do about it. The signal you are getting from your cable company is a low definition 480i signal, with a resolution of approximately 640 x 480. Your LDC monitor is a high definition monitor with an optimum resolution of 1024 x 720, 1280 x 1024, or 1920 x 1200, depending on the monitor. It is this mismatch between the cable signal resolution and the monitor resolution that causes the problem.
Note: if you have PIP (picture in picture), you can put the TV picture into the Pip window and get a clearer picture.

There are two general kinds of LCD displays, Passive Matrix and Active Matrix. Essentially,

Passive Matrix LCD monitors are made by putting a layer of liquid crystal dots over a criss-crossing grid of wires backed by a fluorescent backlight. In a Passive Matrix display, current is applied to the wire intersections. The current causes the liquid crystal dots at that point to untwist (turn on) and allow light to pass through. The image that occurs is maintained by applying the current to the intersections at a set refresh rate and depends upon the ability of the liquid crystal to stay untwisted between refreshes. Passive Matrix LCD displays have slow response times and tend to display fuzzy images that lack good contrast and brightness.

Active Matrix LCD monitors, in contrast, have a criss-crossing matrix of thin film transistors (TFT) instead of a matrix of wires. TFTs are basically very small, very thin transitors and capacitors. In an Active Matrix LCD monitor, the current is applied to the capacitors located at the row and column intersections. The current at the interesection causes the liquid crystal to untwist and the capacitor retains the charge, actively keeping the crystal untwisted, until the next refresh cycle. The transistors control the amount of current going to the liquid crystal and the capacitor, thereby actively controlling the amount of untwisting. Active Matrix LCD disaplays have much faster response times, clearer, brighter images, and much greater contrast than Pasive Matrix displays.

LCD monitors terminate video at 75 ohms.

EXT(RGB) is the name given to a kind of terminal or jack that is available on some multi-purpose OIC Korea monitors.

The EXT(RGB) jack or connection terminal is actually a 21 pin SCART RGB video jack that is compatible with SCART plugs and connectors. SCART is found mainly in Europe where it is used on video devices compatible with the PAL video standard.

RGB, by the way, stands for red, green, blue.

If you see the Check Signal or No Connection, Check Signal Cable message, it means either:

1. 1. If you have an analog monitor, that the signal cable connecting your video card to your monitor is loose or disconnected.

1. 1. If you have a digital monitor and you are using a DVI cable, that the DVI cable is loose or the monitor is set to analog.

To rectify the problem if you have an analog monitor, make sure that the signal cable is connected firmly to the monitor and to the video card. If you have a digital monitor, first make sure that the DVI cable is connected firmly to the monitor and to the video card. If that does not solve the problem, press the source button on your monitor to make sure the monitor is in digital mode.
To set the Windows Volume Control dialog, follow these steps:

1. 1. Turn on your computer and monitor and bring up the Windows desktop.

1. 1. Double click the Loudspeaker icon on the lower right side of your monitor screen. The Volume Control dialog appears.

1. 1. Click Options>Properties. The Properties dialog appears.

1. 1. Click Playback.

1. 1. Make sure that all the volume controls that control the various inputs you use (Volume Control, Wave, SW Synth, CD Player, Line In, etc.) are checked. Click OK when done.

1. 1. On the Volume Control dialog, use your mouse to slide all the sliders of the inputs you use to at least the half way point.

1. 1. Make sure none of the Mute boxes of the inputs you use have been checked.

1. 1. Close the Volume Control dialog.

To get sound from the speakers in your monitor you must do two things:

1. 1. Connect the audio out jack on your computer to the audio or speaker in jack on your monitor.

1. 1. Make sure that the Windows Volume Control dialog is set correctly.

To connect the audio out jack on your computer to the audio or speaker in jack on your monitor, follow the directions in your monitor’s user’s manual.
Note 1: If you have a digital monitor, but you are using a standard D-sub cable to connect it to your computer and you are running the monitor in analog mode, use the instructions for analog monitors above.

Note 2: If the signal cable is connected firmly to the monitor and the video card and you still see the Check Signal message, most likely the cable is defective. If this is the case, try replacing the cable.

Currently, there are three main methods of transmitting television video signals, composite video, S-video, and component video. Of the three, component video provides the highest quality video image. Component video is made up of three signals, the luminance signal, the blue signal and the red signal. The luminance or Y signal contains brightness and black and white information. The blue or Pb signal contains information about how much blue is in image. The red or Pr signal contains information about how much red is in an image. Green is not transmitted separately. Instead, the receiving device calculates the amount of green based on the information it receives about the brightness of the image and the amount of blue and red. Component video signals can have resolutions of 1080i or 720p, which are both high definition formats, 480p, which is the progressive scan format, or 480i, which is the standard video format. Component video requires three connectors, one for each of the component video signals. If you were to look at the back of most DVD players, TVs, and multi-function monitors, you would see the three component connectors, typically grouped under a Component Video label and marked Y, Pb, and Pr.
Note: Component video is for video only. If you connect your TV or monitor to a video source using your component video inputs, you must also connect the audio output of your source to the audio input on your TV or monitor.

If your LCD monitor display has no color, very light color, or the color is distorted, try the following:

• • Unplug the cable connecting your monitor to your DVR or CCTV Camera and make sure that the plugs on either end do not have a bent pin.

Note: If a pin is bent, use a needle nose pliers to very gently straighten the pin or, if the pin is severely damaged, replace the cable.
Replug the cable at both ends and make sure that the plugs are securely connected to the back of your monitor and to your DVR or CCTV Camera. Test your monitor. If the problem remains after you have confirmed that there are no bent pins and you have made sure the signal cable is connected securely replace your current signal cable with another cable.
If the suggestions above do not resolve the color problem, try resetting the color through the OSD (on screen display) menu.

To reset the color on most OIC Korea LCD monitors, follow these steps:

1. 1. Press the Menu button on your monitor. The OSD appears.

1. 1. Press the Up, down, left and right arrows Adjust button to cycle through the menu until the Reset menu appears. One of the selections on the reset menu should be Color Reset.

1. 1. Press the Menu button again to select the Reset menu or function menu.

1. 1. Press the Up, down, left and right arrows Adjust button to temperature Color Reset.

1. 1. Press the Menu button to select Color Reset.

1. 1. Press the “select” Adjust button to select Yes. The screen may flash as the monitor resets the color.

1. 1. Press the Exit button on the monitor three times to exit the OSD.

Note: The procedure above works for most OIC Korea LCD monitors. It may not work for yours. For exact instructions, see you user’s manual. If you don’t have your user’s manual on hand. If your problem is not resolved after you have reset the color, try pushing the Auto Adjust button on your monitor. If your problem is not resolved after you have pushed the Auto Adjust button, you should run a monitor self-test to check whether your monitor is functioning properly.
To run the self test, follow these steps:

1. 1. Turn off both your computer, another video equipment and the monitor.

1. 1. Unplug the video cable from the back of the computer.

1. 1. Turn on the monitor. Depending on your monitor, one of the Check Signal Cable figures shown below appears.

Note: While in the Self-Test mode, the monitor’s LED power indicator remains green and the Check Signal Cable figure moves around on the screen.

To connect your monitor to your DVR (or another PC), follow these steps:

1. 1. Turn both the monitor and the DVR (or another PC) off.

1. 1. Using the appropriate cable, connect either:

1. 1. The 15 pin D-sub out port on the DVR(or another PC) to the 15 pin D-sub in port on your monitor.

1. 1. The DVI out port on your DVR(or another PC) to the DVI in port on your monitor.

1. 1. Important: Connect one or the other. Do not connect both.

1. 1. Turn on your monitor and DVR (or another PC).

1. 1. Monitor display on, DVR (or another PC) display off.

1. 1. Both monitor display and DVR (or another PC) display on.

1. 1. Monitor display off, DVR (or another PC) display on.

RS232 is an industry standard communications interface between a PC computer and a peripheral device. The RS232 interface is usually known as “serial” interface and is used to control a peripheral device, such as modems and display devices. The RS232 interface is sometimes called the RS232C interface. The RS232 standard requires peripheral devices to use a 25-pin or a 9-pin connector. OIC Korea’s Public view monitor and 15LCD built in 4 / 8ch DVR use 9-pin connectors.

The serial interface is a two-way communications device meaning that it can send and receive data at the same time. The speed in which the interface communicates is denoted by the “baud rate”. OIC Korea’s Public view monitor and 15LCD built in 4/8ch DVR operate at a baud rate of 9600.

The RS-232 standard imposes a cable length limit of 50 feet; however, this is usually ignored since a cable can be as long as 10000 feet at baud rates up to 192000 if you use a high quality, well shielded cable. The external environment has a large effect on lengths for unshielded cables. In electrically noisy environments, even very short cables can pick up stray signals. For OIC Korea¡¯s Public view monitor and 15LCD built in 4/8ch DVR, the following offers some reasonable guidelines for 24 gauge wire under typical conditions.

Baud Rate: 9600

Shielded Cable Length: 250

Unshielded Cable Length: 100