3800 Krohn Hite Filter


The 3800 is a Filter from Krohn Hite. Electronic filters perform a variety of signal-processing functions with the purpose of removing a signal’s unwanted frequency components, enhance desired ones, or both. There are many types of electronic test equipment filters, including those that are passive, active, analog, digital, low pass, high pass, linear, and nonlinear. Linear filters are the most commonly used for most electronic equipment applications.

Additional Features:

  • Frequency: 100 kHz
  • Locks on and tracks an input signal buried 10dB below the noise level
  • Slope attenuation of 12 dB per octave of bandwidth
  • Four pole Butterworth or RC Filter response
  • Automatic gain control over a dynamic range of 70 dB
  • Q factor as high as 100,000,000
  • Internal oscillator may be tuned separately or synched to center frequency

The Krohn-Hite 3800 Tracking Filter is a very narrow-band tracking filter with the unique ability to track without a reference signal. It can lock on and track an input signal buried 10 dB below the noise level. It has been designed with an AGC system to provide maximum output voltage, regardless of input level within its 70 dB dynamic range, and fixed gain up to 30 dB, depending on the GAIN mode selected. The frequency range is from 1 Hz to 100 kHz. Extremely high Q factors of up to 100,000,000 can be obtained with this narrow-band filter. Bandwidths as narrow as 0.001 Hz with a center frequency of 100 kHz are easily selected. 

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