According to FCC regulations, what is the formula for calculating the attenuation requirement for emissions in a 4 kHz band with the center frequency removed by more than 250 percent of the authorized bandwidth?
43 dB + 10 * log(transmitter power)
35 dB + 10 * log(transmitter power)
35 dB - 10 * log(transmitter power)
25 dB + 10 * log(transmitter power)
43 dB - 10 * log(transmitter power)