Exploring Signal Interactions with Multiple Measurements
应用文章
Overview
As wireless designs evolve, dense integration increases the likelihood of unwanted interaction between the baseband, RF, IF and digital sections of a device. In testing and troubleshooting, the longstanding paradigm has been to make one measurement at a time using a spectrum or signal analyzer. This method of looking at one signal in one place at a time can impede progress and overlook problems related to signal interactions. Faster testing under real-world operating conditions is critical in product categories that depend on rapid introductions of new or modified designs.
Today, the 89600 VSA software offers an alternative: make multiple measurements simultaneously using one or more measurement front-ends. Keysight Technologies, Inc. introduced multi-measurements as a standard feature in release 15 of the software, adding enhancements in release 161. Multimeasurements extend all the capability of the 89600 VSA software to multiple simultaneous measurements in the time, frequency and modulation domains for all supported signal formats. It can do all of this using digitized waveforms from more than 40 supported instruments, and the software can coordinate measurements from multiple instruments at the same time.
This application note describes three problem scenarios, introduces the multimeasurement concept and presents several example test scenarios.