The 1564A Sound/Vibration Analyzer operates in the frequency range of 2.5Hz to 25kHz in four decades. 25 Mohms input impedance in parallel with 80 pF. Input range of 0.3 mV to 30 V full scale. Output: 1 V open circuit. Three scales: 0 to 3 V, 0 to 10 V, -6 to +10 dB. AC or battery operated. Unit comes with 2 microphones.
