Pulse code cab signaling. Pulse code cab signaling is a form of cab signaling technology developed in the United States by the Union Switch and Signal corporation for the Pennsylvania Railroad in the 1920s.
Measure the diagonal length of your screen from the top left corner to the bottom right corner. Measure only the screen; do not count the frame around the screen. Measure the height of the screen from top to bottom. Measure the width of the screen from left to right.Once you have all three measurement values, you will be able to confidently order your screen filter or place your monitor up for sale.easure only the screen; do not count the frame around the screen. Measure the height of the screen from top to bottom. Measure the width of the screen from left to right.
2) Measure Your Computer Monitor Screen. 1  Raised Frame: Measure the height, width, and diagonal length of your screen's viewing area, excluding the raised frame. 2  Flat Front Glass: Measure the height, width, and diagonal length of your screen's entire glass display, making sure to measure from edge-to-edge.