Detailed Demonstration Guide: Sourcing Clean Voltage Using B2961A/62A

Keysight Technologies

Detailed Demonstration Guide: Sourcing Clean Voltage Using B2961A/62A

Keysight B2961A/62A 6.5 Digit Low Noise Power Source

Introduction

The Keysight Technologies, Inc. B2961A/62A 6.5 Digit Low Noise Power Source is a bench-top power supply with revolutionary capabilities and functions not previously available. It can source either voltage or current with 6.5 digit of resolution while also monitoring them, which is essential for a variety of measurement applications.

Using optional external filters extremely reduces the noise level of the Keysight B2961A/62A output down to 10 µVrms (10 Hz to 20 MHz) at maximum, which satisfies requirements for testing oscillators and oscillating devices such as VCOs, PLLs. It also enables the testing and evaluation of ADC devices that require precise low-noise voltage supplies/sources for proper characterization.

This demonstration guide shows excellent low noise output capability of the B2961A/62A Power Source with external filters by monitoring the outputs through the oscilloscope.

Setup

Oscilloscope setup

1. Set vertical scale of Ch1, horizontal scale to 5 mV/div, 5 ms/div.

2. Set Ch1 Input Impedance to 50 Ohm and BW Limit enabled.

3. Select “AC RMS – FS”, “Pk-Pk” as Measurement Type.

4. Confirm the noise floor of those Measurement Type on the scope.

B2961A/62A setup

1. Attach a banana-to-BNC adapter to the B2961A/62A’s Ch1 High/Low Force Terminals

2. Connect the scope’s Ch1 and BNC terminal of the banana-to-BNC adapter with a BNC cable.

LAB: Show Output Noise via Oscilloscope

Objective

This demo shows excellent low noise output capability of the B2961A/62A Power Source with external filters by monitoring the outputs through the oscilloscope.

Procedure overview

1.Show output noise without external filter

2. Show output noise via Low Noise Filter

3. Show output noise via Ultra Low Noise Filter