Krohn-Hite Corporation, 15 Jonathan Drive, Unit 4, Brockton, MA 02301
Ensuring your equipment is top-notch when you're performing testing and measurements is essential. We're aware of this importance, which is why we go above and beyond at Krohn-Hite Corporation to ensure that the equipment we manufacture is dependable and high quality. We would like to introduce the latest addition to our host of many other testing and measuring instruments: the Krohn-Hite Model 3955. Our Model 3955 boasts the absolute best in precision and overall functionality. Here's what to expect from our latest model.

What is the Krohn-Hite Model 3955?

The Krohn-Hite Model 3955 is a dual-channel low-pass Butterworth/Bessel programmable filter that operates on frequencies ranging from 170 HZ to 25.6 MHZ. The Model 3955 is the first of its kind to offer dual low-pass filtering, which opens up numerous possibilities for those performing testing and measuring in their professions. The model offers input gains up to 20 dB, and output gains up to 26 dB for ease and versatility in programming. The device also has self-diagnostic capabilities, and each time it's powered on, it performs a self-test. If problems within the system are detected, a failure notification will appear on the display. This handy feature can minimize downtime, as users are immediately alerted of the specific issues, which can be quickly repaired, allowing users to resume the duties that the device allows them to perform as soon as possible. The specifications of the 3955 are:
  • Frequency Control: Increment/decrement keys for precise programming and frequency adjustments
  • Cutoff Frequency Accuracy: ±2% to 2.56MHz, ±5% to 25.6MHz.
  • Passband Response: ±0.2dB up to 2.56MHz, ±0.5dB to 25.6MHz.
  • Input/Output Coupling: AC or DC. AC coupling cutoff is approximately 16Hz at the input and 10Hz at the output with a 50ohmstermination.
  • Noise Spectral Density: Below–128dBm/Hz into 50 ohms
  • Harmonic Distortion: Greater than 60dB below signal up to 100kHz

The Applications of the Krohn-Hite Model 3955

The Model 3955 is a versatile instrument, and professionals in many different industries can conduct a variety of applications using the Model 3955. Here are just some of its key uses:
  1. Video Recording - When working with video recording, there are many frequency issues that can impede the process of recording, playing back video, and more. Video recording artists can utilize Model 3955 to filter out undesired frequency noise, which can dramatically improve the quality of video recordings.
  2. High-Frequency Anti-Aliasing - Aliasing is a common problem that those working with audio, video, and other types of equipment must contend with. It can result in signal distortion, which can make achieving your goals impossible. The Model 3955 efficiently manages this problem with its high-frequency anti-aliasing capabilities, allowing users to easily obtain a clear signal to complete their work.
  3. Universal Signal Conditioning - Whether users are working in telecommunications, instrumentation, electronics, or some other field, unwanted noise and other issues can distort signals, making it challenging to obtain accurate measurements. However, with the Model 3955, these and similar problems are a thing of the past. Its universal signal conditioning feature effectively amplifies the strength of the signal, making it more easily discovered. This feature also uses isolation, linearization, conversion, and filtering to effectively condition signals.
  4. EMI Testing - Engineers frequently conduct EMI testing to determine the levels of electromagnetic energy conducted in a power line or even emitted in the air. Precise measurements are essential for the absolute best results, and the Model 3955 makes this possible. Not only does the Model 3955 offer versatility and the ability to be used in numerous situations, but its dual-channel low-pass filtering makes attaining these measurements effortless.

Benefits of Investing in the Model 3955

There are many benefits of investing in the Model 3955. Some of the many benefits of investing in this particular programmable filter are:
  • Durable Manufacturing - At Krohn-Hite, we ensure all our instruments are constructed with unbeatable durability in mind, and the Model 3955 is no different. Built to combat even the most rigorous use, this dual-channel filter will remain intact and with the ability to function with the reliability you expect for many years to come
  • Simple and Straightforward Interface - Just because the Model 3955 functions so reliably doesn't mean it must be difficult to operate. In fact, we made certain that the exact opposite is true, as the interface is user-friendly, making it a cinch for even a beginner to operate. Its intuitive controls make the entire user experience smooth and enjoyable. The General Purpose Interface Bus can also be controlled remotely for your convenience
  • Expansive Frequency Range - The Model 3955 enables a wide range of frequencies, which makes it appropriate to be used in a number of industries
  • High Precision - Anyone using a programmable signal filter relies on precision, and we've ensured the Model 3955 provides immense precision. This device is reliable, as it provides dual channels that work simultaneously to filter signals. Before the Model 3955, two separate instruments were needed to perform the same task. Not only can this provide cost-savings, but it can save space and time as well

Amplifier Bypass Mode

For users in need of an amplifier instead of a filter, the Model 3955 can be utilized in 'amplifier mode'. By bypassing the filter and using the amplifier capabilities, users can easily and effectively boost signal strength without modifying the signal itself. Amplifier mode offers input and output gains, allowing users to select the level of amplification they need at the time. This added feature of the filter makes the Model 3955 incredibly useful and flexible for professionals working in many different industries. With nearly 80 years of experience exceeding the expectations of the numerous customers we've assisted over the years, we ensure we're always on the cutting edge. We will continue to add the latest and the absolute best testing, measuring, and calibrating tools to our inventory. If there is a new and more technologically advanced method of taking more precise and efficient measurements, we are going to make certain we develop an instrument using that technology.
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Model 3955 - 2 Channels