The GPT-50 GPS Video Titler adds real-time GPS data to SD analog composite video for recording or viewing. The video output from the GPT-50 is the same as the video input plus a caption of GPS position and other data, depending on input code format. The GPT-50 works with NTSC RS-170A or 625/50 SD analog composite video and RS-232 or RS-422 serial inputs, in several selectable formats. You can select from a total of 12 GPS input code formats.