Rohde & Schwarz, the Munich-based electronics group, has developed the R&S FSMR3000, a microwave measurement receiver to calibrate signal generators and attenuators with one single instrument.
The R&S FSMR3000 provides a range of features that includes tuned RF level measurements, level measurements, analogue modulation and spectrum analysis. The new product can be equipped with powerful hardware for a high-end phase noise test supplementary to the standard phase noise test with the spectrum analyzer. It further offers digital and analogue modulation signal analysis, 80 MHz analysis bandwidth, analysis of pulses and VOR/ILS signals.
Along with level calibration, the R&S FSMR microwave measurement receiver provides analogue AM, FM and φM modulation analysis. The R&S FSMR3000 is designed to make the signal generator and attenuator calibration “less complex” and includes features that make calibrating lab test processes “easier”, according to the company. The 8 GHz, 26.5 GHz and 50 GHz instruments meanwhile, provide the necessary measurement capabilities in a single box instrument.
The high dynamic range of the R&S FSMR has a level measurement range of -152 to +30dBm. The low linearity uncertainty in the instrument of ± (0.009 dB + 0.005 dB per 10 dB step) together with absolute power sensor calibration provides accurate signal level measurements, where the R&S NRP50T can cover the whole frequency range from DC to 50 GHz.
Built-in analogue modulation analysis is available for AM, FM, and φM modulation measurements. AM modulation depths from 0 to 100% and FM frequency deviations as wide as 16 MHz can be measured. The instrument has a 16-bit AD converter with 200 Msamples/s for modulation analysis with an internal signal analysis bandwidth of up to 80 MHz. If the analysis option is installed, modulation measurements on digitally modulated signals are also possible. Pulses can be automatically analyzed. No additional vector signal analyzers are needed to measure the performance of these signals.
VOR (VHF Omnidirectional Range, an on-course radio beacon) and ILS (Instrument Landing System, for guidance during approach and landing) are air traffic navigation aids based on amplitude modulated signals and require accurate and reliable modulation measurements. The R&S FSMR has an option for extending calibration to VOR/ILS signal generators and can calibrate without an additional tester.
The R&S FSMR3000 also provides what Rohde & Schwarz states is “high-performance” spectrum analysis measurements to enable “a complete analysis of harmonics, spurious emissions as well as noise figure or phase noise measurements up to 50 GHz”. Marker functions and measurement functions for all interesting spectrum measurements are provided to measure noise power, ACLR, harmonic distortion, occupied bandwidth and spectrum emission masks. The resolution bandwidth can be set between 1Hz and 80 MHz and additional channel filters are provided.
Equipped with powerful hardware, the R&S FSMR3000 provides additional phase noise analysis. The receiver can be equipped with a second receive path for high-end applications, enabling cross-correlation and increasing sensitivity by up to 25 dB depending on the number of correlations.
You can find more information about Rohde & Schwarz and the R&S FSMR3000 on its website.
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