How to Measure Power Supply Noise Accurately

Get Quote
Pro Benchtop DC Power Supply
+ Pro Benchtop DC Power Supply
Pro Benchtop DC Power Supply
+ Pro Benchtop DC Power Supply

Measure Voltage Noise with High Precision

Measuring power supply noise requires a stable voltage source, an oscilloscope configured for low-noise measurement, and proper signal connections. The setup involves configuring the oscilloscope with appropriate bandwidth limits, impedance settings, and measurement types such as RMS (root mean square) and peak-to-peak voltage noise. The power source is configured to output a defined voltage level while the output is monitored through a coaxial connection.

The measurement process compares noise performance under different conditions, including direct output and filtered output configurations. External filters are inserted between the source and measurement instrument to reduce broadband noise. The resulting waveform and RMS noise values are observed on the oscilloscope, allowing comparison of noise levels across configurations and verification against the instrument noise floor.

Power Supply Noise Measurement Solution

Accurate power supply noise measurement requires configuring a voltage source, connecting it to a measurement instrument, and analyzing the resulting waveform under controlled conditions. The solution includes a precision low-noise power source capable of sourcing voltage or current with high resolution, combined with external filtering options that significantly reduce output noise. External low noise and ultra-low noise filters enable stepwise reduction of output noise from millivolt levels to microvolt levels and ultimately to the oscilloscope noise floor. The system also incorporates an oscilloscope configured for RMS voltage noise measurement and bandwidth limiting. Together, these components enable repeatable noise characterization and clear visualization of noise reduction effects across different configurations.
Get Quote

See Block Diagram of Accurate Power Supply Noise Measurement Solution

How to Measure Power Supply Noise Accurately

Explore Products in Our Power Supply Noise Measurement Solution

Related Use Cases

How to Make Resistance Measurements

Resistance measurements require eliminating error-inducing factors, such as residual test lead resistance, thermal electromotive force, and leakage currents in the measurement path. Learn how to address these measurement issues using a remote sense function (4-wire connection), offset compensation, and a guard function.

Learn More

How to Bias Multiple Quantum Qubits

Supplying DC bias voltage to control multiple qubits in quantum computing development requires maintaining the integrity of the qubits by preventing qubit decoherence. Learn how to characterize qubits with low-noise voltage supply and source meter placements for the cryostat.

Learn More

Burn-in and Reliability Stress Test Solution

Learn how to ATE system power supply, combined with the automated power suite, provides a modern, energy-efficient approach to burn-in and reliability stress testing.

Learn More

contact us logo

Get in Touch with One of Our Experts

Need help finding the right solution for you?

Contact Us