"Our Model 6900B is the first and only fully automatic Distortion Analyzer to provide an easy solution to your distortion and AC voltage measurements needs over the frequency range from 5Hz to 1MHz. This fully automatic distortion analyzer is ideal for both precision laboratory measurements and routine production testing. It provides faster error free measurements for the unskilled operator.","Fully Automatic Distortion Measurements","• Frequency Range: 5Hz to 1MHz, Auto Nulling","• Voltage Range: 100mV rms to 130V rms, Auto Leveling","• Measures Distortion Down to 0.005%","• Measures AC Voltage: 0.010V rms to 130V rms, 5Hz to 1MHz","• Internal Oscillator: 1kHz, <.003% Distortion","• Hands Off Operation"