Sheppard Cares. Sheppard AFB provides a wide variety of services to support Airmen and their families. To learn what's happening this month, check out the Sheppard Community Board. To quickly find and register for classes available on base, click the Leadership Pathways logo to the right.
NTSC stands for National Television Standards Committee. PAL stands for Phase Alternating Line. NTSC is the standard broadcast format in the United States, while PAL is the standard broadcast format in Europe, Australia, and parts of Asia.
Lines and refresh rate. NTSC color encoding is used with the System M television signal, which consists of 30â1.001 (approximately 29.97) interlaced frames of video per second. Each frame is composed of two fields, each consisting of 262.5 scan lines, for a total of 525 scan lines.