The QD Series Video Quad Unit

You've probably seen a video quad in action before at a guard station in a business establishment. A video quad splits the image on the screen into 4 viewable sections, allowing you to view the images from 4 different cameras at the same time. A video quad makes an excellent addition to any video security system with multiple cameras.

You don't need a quad unit if you have a DVR, because DVRs have a built-in quad. But if you are using just a monitor, a VISEC, or a VCR with multiple cameras, a quad can greatly enhance your system. Let's look at some of the features of the QD series.

There are two models of video quad available in the QD series - the QD-104 black and white model and the QD-109 color version. The only difference in the two models is that one is color and the other is black and white - all the other features are the same. These quads are high resolution, real-time quads and support up to 4 security cameras. They feature the ability to playback and zoom in on recorded video. They also feature full duplex operation, which allows transfer of video and playback at the same time.







These quads can be used in 2 ways in your video surveillance system. First, if you just do monitoring and no recording, you can insert the quad between the cameras and the monitor. This will allow you to monitor all 4 cameras in real time on the same monitor. Second, if you have a VISEC or VCR, you can insert the quad between the 4 cameras and the VISEC or VCR. This will record the images of all 4 cameras onto the VISEC or VCR, and in addition you can view the output of all 4 cameras in realtime.

These video quads also feature a 2x2 zoom. And they use a 60 fps (frames per second) refresh rate for flicker-free video. They feature a realtime clock which adds the date/time to each of the images in the quad. They also feature a title generator allowing you to place a title in each of the 4 frames. For example you might label one frame "Front Entrance", and another frame "Rear Entrance", and so on describing the location of the camera for that frame. The units feature an OSD (On-Screen Display) for selecting different functions, much like you are used to on a VCR or DVD player.

The quad is displayed without a border for maximum use of the display resolution. Some quads put a border around each frame, using up valuable pixels and lessening the resolution in each quad. And these quads feature a 2H adaptive comb filters for Y/C separation. Let's sum up some of the features of these excellent video quad units:

- Full duplex allows transfer of recording and playback video at the same time.
- 2x2 zoom
- 60 frames per second
- Real time clock
- Title generator
- On-screen display
- No boarder for full quad display
- 2H adaptive comb filters for Y/C separation

As you can see, the combination of features makes these quad units a good compliment to any professional or other video security camera system. If you have an older system without a DVR, or can't afford one, the addition of a quad can greatly enhance your video security system. These units are full-featured, affordable, easy to install and use.

For more details about the QD series of quad video units and information on pricing and where to purchase, see the following link: The QD Series Video Quad Units