Distortion is measured down to <0.003%.
Additionally 3 filters, 400Hz hi pass, 30kHz and 80kHz low pass are provided to aid in removing unwanted signals.
Input voltages can be measured from 300.0 V to 0.3 mV with a true RMS detector.
SINAD is m

• Keysight (Agilent) 8903A - Datasheet (122 kB)