Krohn-Hite 3944
High-Pass / Low-Pass Butterworth / Bessel Programmable Filter, 3 Hz to 2 MHz

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Manufacturer: Krohn-Hite
Model: 3944

Krohn-Hite 3944 High-Pass / Low-Pass Butterworth / Bessel Programmable Filter, 3 Hz to 2 MHz

Electronic Test and Measurement Equipment

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Product Overview

KROHN-HITE 3944

The Krohn-Hite Model 3944 is a 4-channel, Butterworth / Bessel filter offers a programmable or bench top filter covering a cutoff frequency range from 3 Hz to 2 MHz, with a frequency response characteristic of maximally flat (Butterworth) for clean filtering in the frequency domain, or linear phase (Bessel) to provide superior pulse or complex signal filtering. The passband gain is unity, and the attenuation slope is 24 dB/octave per channel. The 3944 will accept input signals of ± 4.5 V peak and provides input and output gains of 0 dB or 20 dB which can be selected via the front panel keyboard or over the GPIB bus.

The Krohn-Hite 3944 filter can be programmed to operate in any combination of four channels of high-pass or low-pass; two channels of any combination of band-pass or band-reject; or one channel of band-pass or band-reject and two channels of any combination of high-pass or low-pass. The four channels can be connected to achieve 96 dB/octave of high-pass or low-pass.

The Model 3944 offers to the user 99 groups of non-volatile memory for storage of front panel set-ups, which are stored in battery-backed CMOS. Set-ups can then be recalled with a simple command. The 3944 also provides a self-test diagnostics upon power-up of its internal memory to insure the unit is operating properly. If a failure occurs, the display will indicate which ROM or RAM has failed.

Applications for the Krohn-Hite 3944 include: are anti-aliasing, random noise testing, sound measurements, sound recording, suppressing interference in audio communications circuits and many more.

Key specifications of the Krohn-Hite 3944 Filter include:

Four Independent Channels
Filter Types: Butterworth or Bessel
Attenuation Slope: 24dB/Octave/Channel
Frequency Range: 3Hz to 2MHz
Input Gain: 0dB or 20dB
Output Gain: 0dB or 20dB
Stopband Attenuation: >95dB
By-Pass Mode

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Krohn-Hite 3944High-Pass / Low-Pass Butterworth / Bessel Programmable Filter, 3 Hz to 2 MHz

Product Overview

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Krohn-Hite 3944
High-Pass / Low-Pass Butterworth / Bessel Programmable Filter, 3 Hz to 2 MHz