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N9020A MXA Signal Analyzer

Accelerate the Development of Wireless Devices with the Speed, Performance & Applications to Adapt to Evolving Test Requirements

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N9020A MXA Signal Analyzer

EM Scanner - YIC Technologies

High speed 8GHz Real-time EMC and EMI diagnostic tool on your lab-bench

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YIC EM Scanner

SM200B Spectrum Analyzer

The High Performance SM200B From Signal Hound: High Performance Speed, Accuracy, Security, and Agility Meet Very Low Cost

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3945 - Krohn-Hite Tunable Filters


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  • Model: 3945
  • Manufactured by: Krohn-Hite
  • High end frequency limit: 2.00MHz
  • Channels: 3
  • Operation Modes: LP
  • Extra Specifications: Tunable Active Filter
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Krohn-Hite 3945 Overview

The Krohn-Hite Model 3945 programmable filter provides one Butterworth channel of low-pass, tunable over the range from 170Hz to 25.6MHz; and two independent Butterworth or Bessel channels of low-pass, high-pass or bypass, one channel of band-pass or band-reject, tunable over the range from 3Hz to 2MHz.

The 3945 has been specifically designed for applications requiring high frequency band-pass filtering. The high cutoff may be set to any frequency between 170Hz and 10MHz, and the lower cutoff to any frequency between 3Hz and 2MHz.

One channel of the 3945 can operate as a low-noise amplifier, bypassing the filter, delivering a bandwidth of 50MHz and gains up to 46dB. This is useful to users wanting to increase the gain of the signal and improve signal-to-noise ratio before filtering. The other two channels of the 3945 furnish Bessel or Butterworth transfer functions and can be programmed to operate as two low-pass, high-pass, one band-pass or band-reject filter with gains to 40dB per channel.

The 3945 offers 99 groups of non-volatile memory for storage of front panel set-ups, which are stored in battery-backed CMOS. Set-ups can be recalled with a simple command. Self-test diagnostics occur upon power-up insuring that all internal memory is operating properly. If a failure occurs, the display will indicate which ROM or RAM has failed.

iso9001 Calibration

Calibration & Test Equipment Repair

The BRL Test Lab offers in-house ISO9001:2015 compliant calibration to its end users and industry professionals with precision accuracy, fast turn-around times, and a seamless customer experience.
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