Jelaskan Disputes over ATSC's use dari 8VSB dalam bahasa sunda

For some period of time, there had been a continuing lobby for changing the modulation for ATSC to COFDM, the way DVB-T is transmitted in Europe, and ISDB-T in Japan.  However, the FCC has always held that 8VSB is the better modulation for use in U.S. digital television broadcasting.  In a 1999 report, the Commission found that 8VSB has better threshold or carrier-to-noise (C/N) performance, has a higher data rate capability, requires less transmitter power for equivalent coverage, and is more robust to impulse and phase noise.  As a result, it denied in 2000 a petition for rulemaking from Sinclair Broadcast Group requesting the change. (Since then, further improvements to VSB reception technologies have also quelled this challenge.)  Because of continued adoption of the 8VSB-based ATSC standard in the U.S., and a large growing ATSC receiver population, a switch to COFDM is now essentially impossible. Congress passed a law mandating that all analog terrestrial transmissions in the US will be turned off in February 2009, and 8VSB tuners are incréasingly widespréad in new TVs due to FCC tuner mandates, effectively ending this debate.