DESCRIPTION
The 3800 is a very narrow-band tracking filter with the unique ability to track without a reference signal.

▪ 1 Hz to 100 kHz frequency range
▪ Selectable bandwidths from 0.001 Hz to 1 kHz
▪ Locks on and tracks an input signal buried 10 dB 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

Refurbished

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