3 Results
Automated Solution with High Efficiency
5G New Radio (NR) presents dramatic challenges to the testing of User Equipment (UE) Power Amplifier (PA). Multiple frequency bands, flexible 5G operation mode, multiple PA performance metrics and the MIPI control interface increases the potential PA testing workload significantly. Manually repeating these tests under so many different scenarios can be costly and time consuming. An automated testing solution can help the test engineer to highly improve the testing efficiency.In this application note, it introduces an example of automated testing of 5G UE PA with R&S signal generator, signal and spectrum analyzer, vector signal explorer software, power meter along with power supply.The entire application note is organized with following structure:Chapter 2 outlines the challenges to 5G UE PA testing.Chapter 3 introduces the setup for 5G signal generation and analysis. For 5G signal generation, a batch program of converting *.CSV files with IQ vectors to ARB waveform files is introduced. For 5G signal analysis, the R&S®VSE software is recommended, which enables the separation of RF signal collection and measurement to improve testing efficiency.Chapter 4 provides the informative content about the integration of MIPI control interface for the PA ON/OFF state switching and register configuration.Chapter 5 gives a guide on the implementation of a quick power servo, in which the techniques to speed up the PA power level adjustment are discussed.Chapter 6 summarizes the automated testing procedure.
09-Aug-2021 | AN-No. 1SL365
Primer
A power sensor is a fundamental measurement tool in RF engineering. However, today's marketplace is filled with myriad choices, and many are making bold claims about attributes such as measurement speed and readings per second. As a result, it can be difficult to cut through the hyperbole and determine which sensor will actually meet the requirements of a specific measurement.This primer outlines the basics of RF power sensors and highlights a few key characteristics that will help you select the best one for each application. The narrative has three parts. First, we focus on choosing the right type of sensor: multipath, wideband, average power and thermal can satisfy slightly different measurement needs. The second section covers the five major attributes of sensor performance, and what to look for relative to your requirements. Finally, we outline three ways to integrate a sensor into your measurement application.
26-May-2021
Rapid and accurate verification of beamforming weights is required for example, for codebook generation or beamforming algorithm development or verification. This document describes the unique application of Rohde & Schwarz VNA (Vector Network Analyzers) to fully characterize the passive part of multi-element antennas intended for beamforming.A range of R&S VNA models are optionally equipped with multiple independent sources, whose relative amplitude and phase may be arbitrarily controlled ("defined coherence mode"), in addition to frequency and true time delay. These sources may be connected to individual elements of a multi-element antenna to derive and verify transmit (Tx) mode beamsteering and beamforming operation.The R&S®ZVA in "Defined Coherence Mode" can electronically be switched to / from the conventional S-parameter mode. Therefore, Sparameter and beamforming measurements may be performed efficiently within a single connection cycle of the antenna.Multiple VNA may be daisy-chained, to extend the concept shown to support an arbitrary number of ports.The R&S®Quickstep sequencing software may be downloaded from:
20-Mar-2017 | AN-No. 1MA278