Consumer Access to Digital Television Enhancement Act of 2003 - Requires the Federal Communications Commission to: (1) adopt and implement regulations proposed in the memorandum of understanding between the cable and consumer electronics industries filed with the Commission on December 19, 2002, concerning compatibility between cable television systems and consumer electronics equipment, including regulations to require that all television receivers marketed as "digital cable-ready" include the capability to receive off-the-air digital television broadcast signals; and (2) revise its regulations to establish minimum power levels and deadlines for achieving such power levels for any television broadcasting facility transmitting a digital broadcast signal.