Frequencies:200 to 8000Hz in 100Hz intervals SINE:200 to 8000Hz 1/12 oct, nearest 100 Hz intervalsFrequency Acuracy:1% Amplitute:40 to 100 dB (5dB intervals coupler) :40 to 90 dBSPL(5dB intervals coupler); SINE:40 to 100 dBSPL(0.01dB intervals coupler) Amplitude Accuracy Within 1 dB from 300 to 5000 Hz, all others within (All Modes) 3 dB; after leveling