One of the challenges of media transport is link verification. Many of these links must support multiple video formats as well as deal with the unique challenges of SDI pathological signals that can cause havoc on an optical network or media link. To address this, Artel developed a digital video generator and tester to generate both color bar and pathological test patterns for 3G-SDI, HD-SDI, SD-SDI. In addition, it can generate both DVB-ASI and ATSC signals for compressed video applications. With its low cost, and ability to generate all standard video formats in succession, DigiLink's signal generator is ideal for verifying the quality of single or multi-format digital video circuits.