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.
First measure the Diagonal of the screen (not including the frame around the screen, just the visual screen). This diagonal should match the stated size of the Filter (i.e. a 17. Monitor will have a visual diagonal of 17). Next, measure the visual height and visual width of the screen. This should match the dimensions listed on the product page for that filter on our website.