EMI test receiver expands dynamic range

March 02, 2016 // By Graham Prophet
Specifically configured for certification and R&D measurements required in the A&D (aerospace & defence) and automotive sectors, Rohde & Schwarz’ ESW EMI test receiver claims the widest dynamic range and highest level accuracy on the market.

The ESW can carry out certification tests on modules, components and devices as well as on systems and technical facilities in line with all relevant commercial and military standards such as CISPR, FCC and military standards. The ESW can carry out conducted as well as radiated certification measurements and meets the stringent demands placed on EMI measurements in the automotive sector stipulated by internal company standards.

 

It comes in three versions for the frequency ranges from 2 Hz to 8 Ghz/26 Ghz/44 GHz. The instrument includes as standard an extremely fast FFT-based time domain scan (TD scan), which reduces the time required for standard-compliant certification tests. The TD scan can also be run with two CISPR detectors to carry out parallel measurements. For diagnostics and troubleshooting, users can apply additional operating modes such as sweep, scan, realtime spectrum analysis and IF analysis, each with a spectrogram function. The spectrogram function displays the analysed spectrum versus time, making even rapidly changing interferers visible. Realtime spectrum analysis with a bandwidth of 80 MHz, with tools such as persistence mode and a frequency mask trigger, delivers important information on critical and hidden signals.

 

The receiver has additional highpass filters at 150 kHz and 2 MHz as well as notch filters especially for the licence-free ISM bands around 2.4 GHz and 5.8 GHz. Strong carrier signals in these bands can severely impact the dynamic range of instruments during EMI field strength measurements, and minor interference signals outside these bands can go undetected. With its additional filters for the ISM bands and exceptional sensitivity, the instrument overcomes this problem, delivering reliable EMI certification measurements.

 

The unit employs touchscreen operation with an intuitive GUI and flat menu structures. The multiview function lets users see all measurements and modes at a glance. The instrument also incorporates a configurable auto test feature, which makes it possible to automate complex measurement processes. This test configurator allows