Download Center

R&S®SMP Microwave Signal Generator - Data Sheet

Frequency Response Compensation for SMx Generator Series

27-Oct-2009 | AN-No. 1MA56

A high frequency transformer is a key component when designing isolated switching mode power supplies (SMPS). Leakage inductance is essential in the control of many design parameters including efficiency, maximum voltage rating for switching elements and EMI when it comes to designs using customized transformers. Accurate measurement of this parasitic element is mandatory. The R&S®LCX LCR meter is ideal for this challenging measurement task.

15-Feb-2022

Whether you are working with a motor drive, SMPS or power rails, making fast and precise power measurements can be challenging. Whether you are working with a motor drive, SMPS or power rails, making fast and precise power measurements can be challenging. The many unique R&S®RTO oscilloscope features enable you to make better and faster power measurements.

Oscilloscope Days - School of measurement

Dr. Gabriel Rojas

Oscilloscope Days 2024_Part 3b_Measurement fundamentals of ACDC SMPS Brochures and Data Sheets Miscellaneous

This document is divided in two parts and starts with an introduction in AC-DC conversion principles in general. It will present the most common circuits used for different power levels. The switching mode power supply (SMPS) converter will be the main focus as they are used everywhere in the electronics. Especially the flyback converter design in different flavors are highlighted. Nevertheless, all measurements are also applicable for other SMPS converter designs operating at higher power levels.In the second part of this document, most relevant testing methods and procedures of an AC-DC converter are highlighted. For each testing section, a fundamental part will be upfront discussed and it is followed by a presentation of a suitable measurement method. In this second part, the device under test (DUT) is considered as black box device and thus the structure is similar. Therefore, the testing parts consists of methods related to input tests, output tests and a combination of both like efficiency. Of course, some test performed at the output of the converter are also relevant for DC-DC converter, e.g. the validation of the output ripple.

14-Nov-2022 | AN-No. 1SL387

This document describes a method to separate common-mode and differential-mode separation using two oscilloscope channels. This separation approach works without any additional hardware component.

17-Sep-2020 | AN-No. GFM353

The application fields of oscilloscopes extend to EMI debugging because of their powerful and easy-to-use FFT analysis capabilities– and save time and money.

23-Sep-2019

Modern, capacitive touchscreens as used, for example, in mobile phones are susceptible to common mode noise exhibited by external power supplies (EPS).

17-May-2018

This Application Note identifies the various types of Test Port Adapters, their parameters, compatibilities and usages.

28-Apr-2015 | AN-No. 1MA100

Rohde & Schwarz Drivers under VEE - Installation and Troubleshooting

20-Dec-2012 | AN-No. 1MA035

This paper describes the characterization of aluminum electrolytic capacitors specifically used in AC-DC power converter applications. It will be discussed why this capacitor technology is critical regarding lifetime and why it cannot be substituted simply by any another capacitor technology. Different aging effects of the capacitor will be discussed. Usage of the capacitor in different AC-DC converter topologies will be presented. Simulation circuits will be used to analyze the capacitor in more detail before suitable measurements will be performed to demonstrate a real example of a switching-mode power supply (SMPS).After the introduction into the aluminum electrolytic capacitor basics and theory, this paper will also present all important and possible measurements of capacitor parameters, like capacitance, equivalent series resistance (ESR) and ripple current. This includes in-circuit measurement which can be performed with an oscilloscope. An LCR-bridge is used to obtain high accuracy measurements in addition. A comparison between the two measurement methods will be presented. Furthermore, the required measurement hardware for the in-circuit measurements and the bridge measurement will be discussed and presented.Lastly, two different lifetime calculation methods are presented and a real example is used to compare the advantages and disadvantages of the different methods.Thanks to Mr. Frank Puhane from Würth eiSos GmbH & Co. KG who provided me with all aluminum electrolytic capacitor samples including the prepared capacitor with build-in temperature sensors to perform all measurements. Furthermore, his great expertise was very beneficial and helpful to create this premium application note.

07-Feb-2023 | AN-No. 1SL388