Stanford Research Systems SIM965 Bessel and Butterworth Filter

The Stanford Research Systems SIM965 is an advanced analog filter module designed for signal conditioning applications that require either Bessel or Butterworth filter characteristics. This module is part of the Small Instrumentation Modules (SIM) family, known for its high performance and versatility in a compact form factor.

Key Features

• Filter Types: Offers both Bessel and Butterworth filters. Bessel filters provide a clean step response with negligible overshoot and a linear phase response, while Butterworth filters ensure excellent pass-band flatness, though with some overshoot.
• High-Pass and Low-Pass Filtering: Users can select high-pass or low-pass filtering from the front panel, accommodating various signal processing needs.
• Adjustable Cutoff Frequencies: Cutoff frequencies can be set with three-digit resolution, ranging from 1 Hz to 500 kHz.
• Selectable Rolloff: Choose between 12, 24, 36, or 48 dB/octave rolloff for precise control over filter characteristics.
• Low Noise and Harmonic Distortion: The SIM965 is designed to handle input signals between ±5 V with low noise and harmonic distortion, making it suitable for sensitive analog applications.
• Unity Gain: Ensures consistent signal amplification without alteration in signal amplitude.
• Programmable: Fully programmable via computer through the SIM900 Mainframe, which supports both RS-232 and GPIB interfaces.
• Digital Control Architecture: Features a clock-stopping microcontroller design that minimizes digital noise contamination by activating only during settings adjustments.

Technical Specifications

• Input Signal Range: ±5 V
• Cutoff Frequency Range: 1 Hz to 500 kHz
• Rolloff Options: 12, 24, 36, or 48 dB/octave
• Gain: Unity gain configuration
• Noise and Distortion: Low noise and low harmonic distortion
• Interfaces: Programmable through SIM900 Mainframe with RS-232 and GPIB support

This unit is in good working condition and is tested to OEM critical specifications. Comes with a 30 day warranty, and we also offer a 7 day right of return (restocking fee may apply). We have been in business for over 25 years, our main focus is customer satisfaction by providing the highest quality of new or used test equipment. Please let us know if you have any questions.

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