The Checker TVHD is just what you need to test and evaluate today's sophisticated Televisions

(Yes it will also work on yesterday's televisions too)

The Checker TVHD supports all of the popular formats and outputs. Now you can easily test and verify the various inputs and operating modes of the latest High Definition , and Enhanced performance televisions. You can check color tracking using the gray scale and colorbars. The white screen will allow you to check for screen burn and purity, while the cross hatch will display the convergence. 

            Display Formats:  

           Colorbars/gray scale                                                         Cross Hatch

The above images were captured by a video capture card. The images of the High Definition modes are

actual photographs of a Samsung High Definition monitor

Outputs:  480i   Standard television format   - Standard TV (RS170)   S-Video,  and Component Yb Y Yr

                                                    High Definition patterns:

                       480P                                                                             540P  

                                            Component Video   , Y , R-y , B-y

            720P                                                                     1080i 

      and    960P  (We did not have a unit that could display 960P when these photos were taken)

The Checker HDTV has all the features  you need to test and evaluate Standard and HD televisions.

The Checker TVHD is a very easy tool to use. With just two switches, operation is quick and easy. The "Mode" switch is the center switch. It allows you to select the operation mode of the unit. The pointer on the knob will indicate the eight modes you have selected .  The other switch is the power and color selector.  Its operation is described below. You may connect any of the Checker TVHDs' outputs to the corresponding inputs on the TV under test. All outputs function all the time. The composite video and the S-video outputs are only valid in the 480I modes, while the component outputs are valid in all modes. Keep in mind that you can only get the  television into High Definition mode by using the Component connections.  You cannot drive a television into High Definition operation with the single video or S-Video connections.

The first three modes are in the 480I format. This is what we call "traditional" or standard TV. In these modes you are offered colorbars with gray scale, white screen and cross hatch with dots. Since all televisions function in the 480I format, you can check colors, tracking, purity, and convergence. By using the color selector switch, you may display each individual color in the colorbars/grayscale and white screen mode. When entering any cross hatch mode, the color selector will never turn off the green signal. The result is that you will display red/green, green only, and blue/green. These are the usual requirements when checking convergence.

The balance of the modes are "High Definition" modes. You will need to connect to the component inputs of the television to get the signal into the television. While all current model HDTVs have component inputs, not all component inputs are HDTV inputs. Be sure to check the sets connection diagram and the menu selects to insure that the input you selected is set for HDTV. It can get confusing. There are some older sets that have what is known as an "RGB" input via a DB15HD connector. This is actually a computer type input. The Checker TVHD supports only the current "component video" type input.

While the 480P mode is not actually a "High Definition" display, it is a mode that only (as far as we know) a High Definition television will display. In these modes the only pattern available is cross hatch. You may use this pattern to center the display. Remember that most sets require you to set the centering with an external pattern before using the built in "Digital Convergence System" . The Checker TVHD will enable you to this.  You can make a quick check of the convergence and if required, you can enable the sets "Digital Convergence System". The Checker TVHD will provide the drive signals to allow the DCS to function. You may drive the set in the 480P, 540P, 720P, 960P, or 1080I modes (some sets will cannot tell the difference between 540P&1080i). Remember, very few sets will support all of these modes. It is a pretty good bet though, that they all will support 480P, 540P, and 1080i.

The Checker TVHD uses "tri-mode" sync as the default sync  type in all high definition modes. There may be a time however, when you wish to revert to "Bi-level" sync , as some projectors do not like "Tri-mode". You may do this by powering up the Checker TVHD in the 960p mode. Now, all high definition modes will have "Bi-level" sync . It will remain in the "Bi-Level" mode until it is turned off and powered up in any mode, other than 960P.

The Checker TVHD will operate for several  hours on the 9v battery. If you plan to use it for prolonged periods, we recommend using the included AC adapter. The internal battery is disconnected when the AC adapter is connected. You do not have to have a battery installed to use the AC adapter.