What is a Comb Generator?

Comb Generators are used in EMC testing to generate a spectrum consisting of multiple discrete frequency components, spaced at regular intervals, resembling the teeth of a comb. These signals are typically created by generating a fast rise-time pulse or square wave, which inherently contains a wide range of harmonics extending across the frequency spectrum. This makes Comb Generators valuable for verifying the frequency response and functionality of measurement systems such as EMI receivers and spectrum analyzers.

Key performance parameters of Comb Generators include fundamental frequency, harmonic spacing, output amplitude, spectral flatness, and maximum frequency range. The spacing between spectral lines is determined by the repetition rate of the generated signal, while the amplitude of individual harmonics decreases with frequency, depending on the waveform characteristics. These generators are often used to perform quick system checks, validate cable connections, and confirm that test setups are operating correctly across the intended frequency range.

Comb Generators are designed for portability and ease of use, with many models offering battery-powered operation for field applications. They are typically connected directly to the measurement system or radiated through antennas to assess system performance. Some generators provide selectable output levels and frequency ranges, allowing flexibility for different testing scenarios. Their simplicity and broadband output make them an efficient tool for routine verification tasks in EMC laboratories.

Comb Generators are widely used in EMC pre-compliance testing, laboratory setup validation, field troubleshooting, and calibration checks. They are particularly useful for ensuring that measurement equipment is functioning correctly before conducting formal compliance tests. Their ability to generate predictable and repeatable spectral content makes them an essential tool for maintaining confidence in EMC measurement systems.

The Largest Database of Comb Generators

EMC Directory lists Comb Generators from the leading manufacturers. Use the parametric search tools to narrow down on Comb Generators based on your requirements. Once you find products that meet your specification, view product details, download the datasheet, compare products and request quotations. Inquiries generated via everything RF are directed to the manufacturers, who get back to you with a quote or information.