Model 3940 Dual Channel

3Hz to 2MHz, GPIB Programmable

Tunable Active Filter

The Model 3940 embodies Krohn-Hite’s unwavering dedication to delivering precision instrumentation that meets the highest engineering and scientific standards. Built for reliability, accuracy, and versatility, this advanced system enhances any measurement or testing environment, offering innovative features designed to support your most demanding applications.

Precision and Flexibility in a Dual-Channel Design

Experience unmatched control and performance with the Model 3940 Programmable Filter. Thoughtfully engineered with a dual-channel configuration, it delivers two fully independent channels of signal filtering in one compact system. This design allows you to process two distinct signals simultaneously—boosting test efficiency, versatility, and throughput.

Advanced Programmable Filtering Capabilities

The Model 3940 stands out for its sophisticated, fully programmable filter architecture. It enables precise customization of filtering characteristics to suit your specific application—whether in R&D, quality assurance, or any advanced signal processing environment. With programmable high-pass and low-pass filters and adjustable cutoff frequencies from 3Hz to 2MHz, it provides the range and flexibility needed to handle diverse signal requirements with accuracy.

User-Friendly Operation and Seamless Integration

Designed for ease of use, the Model 3940 features an intuitive front panel and clear, real-time display for instant adjustments and monitoring. Its GPIB interface allows for seamless integration into automated test setups, supporting remote control and compatibility with modern software-driven systems. Programming and operation are straightforward, ensuring efficient setup and exceptional control.

Exceptional Performance and Accuracy

Built to deliver outstanding signal integrity, the Model 3940 offers:

  • Low Distortion – Minimizes harmonic interference for pure, accurate
  • High Linearity – Maintains precision across a wide dynamic
  • Selectable Filter Responses – Choose Butterworth for flat frequency response or Bessel for optimal pulse fidelity.

These features make it ideal for demanding applications including signal analysis, noise suppression, and harmonic distortion testing.

Robust Build for Demanding Environments

Engineered to exceed performance and durability standards, the Model 3940 incorporates premium components that ensure stability and reliability over time. Extensive testing guarantees consistent performance across varied environmental conditions—delivering trust and dependability when it matters most.

Versatile Applications

The flexibility of the Model 3940 makes it a valuable tool across industries:

  • Communications: RF and telecom signal
  • Medical Equipment: Precise bio-signal and ultrasound
  • Electronics Testing: Noise reduction and signal integrity
  • Research Laboratories: High-precision control for advanced
Commitment to Quality and Support

Krohn-Hite is dedicated to delivering excellence in both product performance and customer experience. The Model 3940 is supported by our expert technical team, ready to assist with setup, operation, and troubleshooting to ensure seamless performance in your testing environment.

Contact Us

Discover the advanced capabilities of the Model 3940 Dual-Channel Programmable Filter and elevate your test and measurement performance. Contact Krohn-Hite today to learn how this precision instrument can bring reliability, flexibility, and innovation to your signal processing applications.

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