The R&S FSMR3000 series microwave measurement receiver was designed by Rohde & Schwarz to calibrate signal generators and attenuators using a single instrument. It allows for tuned RF level measurements, level measurements, analog modulation and spectral analysis. The R&S FSMR3000 can also be equipped with a powerful hardware solution to perform phase noise testing with high-end performance in addition to the standard phase noise test performed with the spectrum analyzer. With an analysis bandwidth of 80 MHz, it also offers the possibility to analyze digitally and analogally modulated signals as well as pulses and VOR/ILS signals. The R&S FSMR, is an all-in-one instrument that has been designed to reduce the complexity of calibration processes implemented by manufacturers in the aeronautics and defense sectors.
In addition to level calibration, the R&S FSMR microwave measurement receiver can be used to analyze AM, FM and φM analog modulations. The R&S FSMR3000, which has been designed to simplify the calibration of signal generators and attenuators, offers functions that facilitate laboratory calibration processes. This all-in-one instrument, which covers a frequency band of 8 GHz, 26.5 GHz and 50 GHz depending on the model, offers all the necessary measurement functions in a compact package.
The wide dynamic range of the R&S FSMR allows it to perform level measurements from -152 to +30dBm. The low uncertainty of the instrument's linearity, ± (0.009 dB + 0.005 dB per 10 dB step), combined with the absolute calibration of the power meter, thanks to the R&S NRP50T series power probes that cover the entire frequency band from DC to 50 GHz, make it possible to achieve a very high accuracy of signal level measurements.
The instrument incorporates analog AM, FM and φM modulation analysis functions for measuring AM modulation depths ranging from 0 to 100% and FM frequency excursions up to 16 MHz. The instrument uses a 16-bit resolution analog-to-digital converter that samples signals at a rate of 200 MS/s allowing it to perform modulation analyses with an internal analysis band of up to 80 MHz. Modulation measurements on digitally modulated signals are also possible with the installation of the appropriate analysis option. Pulses can be analyzed automatically. No vector signal analyzer is required to measure the performance of such signals.
Air navigation aid technologies such as VOR (VHF Omnidirectional Range, positioning on the ground in relation to a beacon) and ILS (Instrument Landing System, for guidance during approach and landing) exploit amplitude-modulated signals. They require high-precision and highly reliable modulation measurements. The R&S FSMR offers an option for the calibration of VOR/ILS signal generators that it can then calibrate without the need for an additional tester.
The R&S FSMR3000 also performs high-level spectral measurements allowing the analysis of all harmonics, parasitic emissions as well as the measurement of the noise factor or phase noise up to 50 GHz. Marking and measurement functions are proposed to perform all spectral measurements appropriate for the power measurement of noise, ACLR, harmonic distortion, occupied bandwidth and spectrum emission masks. The resolution bandwidth can be adjusted over a frequency range from 1 Hz to 80 MHz. Other channel filters are also available.
Thanks to a powerful hardware solution, the R&S FSMR3000 can perform additional phase noise analyses. For advanced applications, the receiver can be equipped with a second receiving channel, allowing cross-correlation and increased sensitivity up to 25 dB depending on the number of correlations. Thanks to its excellent internal sources and highly digital architecture, the processing speed of the analyzer is faster than those of test systems that digitize the signal after the phase detector. This makes it possible to display phase noise and AM noise in parallel. Results are obtained faster without the need for a second scan to measure AM noise. Both noise contributions are displayed simultaneously on the screen so that they can be compared during the measurement process.
The R&S FSMR microwave measuring receiver is now available from Rohde & Schwarz.
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