Krohn Hite 3103A

The 3103A Tunable Band-Pass Filter is tunable from 10kHz to 3MHz and has an attenuation slope of 24dB/octave. The unit provides a choice of frequency responses: "MAX-FLAT" or Butterworth Responses, for optimum filtering in the frequency domain, and "RC" Response, for pulse or transient-free filtering. Pass-band gain (insertion loss) is unity (0 dB). Maximum attenuation is greater than 80 dB, and internally generated gum and noise is less than 100 microvolts RMS.