• • • TEST & MEASUREMENT • • • Fast load regulation
Consumer electronics such as cell phones and IoT devices have fluctuating power requirements and rapidly transition from low-power sleep mode to high-power transmit mode. Our power supply series has optimised control circuits for a fast load recovery time of less than 30 microseconds to manage load changes effectively with minimal overshoot.
High-speed logging
The R&SNGM and R&SNGU power supplies also have fast logging with a sampling rate of 500,000 samples per second, allowing it to record detailed voltage and current data down to 2 microseconds or with the precision of an oscilloscope. Fast logging makes it easier to analyse energy consumption, identify circuit faults and accurately measure current through sensors such as photocells and thermistors. FastLog data can be stored externally and accessed remotely with USB and Ethernet connections.
Intuitive user interface
Fig. 1: An overview of the key features and capabilities of the four R&SEssentials high-precision power supplies can help find the most suitable device for various applications.
Users can quickly navigate through menus with an intuitive user interface for easy access to functions and settings, configuration of voltage and current ranges and the active operation mode display. The power supplies can be controlled from anywhere via a VNC remote connection. A large touchscreen with 6 ½-digit resolution makes it easy to read data, even from a distance.
Record precise I/V curves Combining current (I) and voltage (V) in an I/V curve is essential when assessing the key properties of semiconductor technology components such as diodes, LEDs and solar cells. Users can create precise I/V sweeps for semiconductor characterisation with Rohde & Schwarz high-precision power supplies. A range of sweep tools, quick arbitrary functions and logging functions make such sweeps easy. The four- quadrant architecture of R&SNGU400 source measure units also supports both positive and negative voltage polarity, which is crucial for power-added efficiency (PAE) and qualification testing, including reverse polarity testing (ISO 16750-2) for electronic control units (ECUs).
Linear design Linear-regulated power supplies have stable output voltage, minimal ripple, low noise and rapid regulation. The supplies are essential when powering complex electronic circuitry sensitive to voltage fluctuations because they mitigate interference when powering devices under test (DUTs) and generate less electromagnetic interference than switched-mode power supplies. The linear design and low interference with voltage and current ripple below 500 µV and 1 mA of R&SEssentials high-precision power supplies make them ideal for developing power amplifiers and MMIC.
Summary Rohde & Schwarz has high-precision, application-specific power supplies that serve as an electronic load but also simulate battery characteristics. Versatile application tools provide IoT device engineers with insights into battery capacity and discharge processes, allowing them to optimise battery design, extend battery life and ultimately develop reliable and sustainable battery-powered devices.
Fig. 2: Rohde & Schwarz high-precision power supplies have exceptionally short load recovery times and unparalleled precision. They reliably record dynamic load changes to help improve testing capabilities for battery-operated devices.
electricalengineeringmagazine.co.uk
ELECTRICAL ENGINEERING • DECEMBER/JANUARY 2025 35
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