Test & measurement Figure 1: The R&S RTP high performance oscilloscope
Flexible debugging oF modern radar and eW systems
By Ezer Bennour, product manager Oscilloscopes, Rohde & Schwarz M
odern radar and electronic warfare (EW) architectures are showing a multitude of technological
advancements that raise the need for more flexible testing approaches. Originally a pure analogue domain, radar and EW modules are getting more and more integrated and exhibit a variety of digital interfaces, especially with the extensive adoption of advanced Digital Signal Processing (DSP) techniques for a fast and accurate signal analysis. When characterising and debugging their
designs, developers of such systems are often looking for versatile instruments that can handle both their RF and digital test requirements and thus reduce the test effort and costs. In this context, the R&S RTP high- performance oscilloscope represents a good fit
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by combining powerful RF signal analysis capabilities with a large set of features for signal integrity and digital interface test.
AccuRAtE chARActERiSAtiOn Of multi-AntEnnA dESignS Sophisticated radar systems are increasingly relying on electronically steered phased array antennas. To characterise these types of systems, test equipment must exhibit multichannel capabilities and ensure that all channels are constantly phase- coherent. Oscilloscopes are very well suited in this case because they typically provide multiple channels which are by design tightly aligned and do not need any additional calibration before performing multichannel phase-coherent measurements. The R&S RTP oscilloscope can fully address these kind of measurements. In order
to achieve the best possible phase accuracy, the R&S RTP is also capable of measuring the channel- to-channel skew and compensating it across the entire signal path between the device under test and the oscilloscope channel inputs by using the high-accuracy differential pulse source R&S RTP- B7 to generate the calibration signals.
in-dEpth multichAnnEl pulSE AnAlySiS cApABilitiES Besides the characterisation of multi-antenna designs, phase-coherence plays a crucial role when modulated pulsed signals have to be analysed in relation to each other. One of the most prominent examples is the
Digital Radio Frequency Memory (DRFM) jamming technique, where the jammer is capable of receiving the original radar signal and creating a
October 2021 Instrumentation Monthly
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