The R&S FSMR3000 series microwave measurement receiver has been designed by Rohde & Schwarz to enable signal generators and attenuators to be calibrated using a single instrument. It enables tuned RF level measurements, analog modulation measurements and spectral analysis. The R&S FSMR3000 can also be equipped with a powerful hardware solution for high-performance phase noise testing, in addition to the standard phase noise test performed with the spectrum analyzer. With an analysis bandwidth of 80 MHz, it can also analyze digitally and analogically modulated signals, as well as pulses and VOR/ILS signals. The R&S FSMR is an all-in-one instrument designed to reduce the complexity of calibration processes used by aerospace and defense manufacturers.
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 calibration of signal generators and attenuators, offers functions to 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 R&S FSMR's wide dynamic range enables level measurements from -152 to +30dBm. The instrument's low linearity uncertainty of ± (0.009dB + 0.005dB in 10dB steps), combined with the absolute calibration of the power sensor, thanks to the R&S NRP50T series of power probes covering the entire frequency band from DC to 50 GHz, means that signal level measurements are extremely accurate.
The instrument integrates AM, FM and φM analog modulation analysis functions, enabling measurement of AM modulation depths from 0 to 100 % and FM frequency excursions up to 16 MHz. The instrument exploits a 16-bit resolution analog-to-digital converter sampling signals at a rate of 200 MS/s, enabling it to perform modulation analyses with an internal analysis bandwidth 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.
VOR (VHF Omnidirectional Range) and ILS (Instrument Landing System) air navigation aid technologies use amplitude-modulated signals. They require highly accurate and reliable modulation measurements. The R&S FSMR offers an option for calibrating VOR/ILS signal generators, which can then be calibrated without the need for an additional tester.
The R&S FSMR3000 also performs high-level spectral measurements, enabling analysis of all harmonics and spurious emissions, as well as measurement of noise figure or phase noise up to 50 GHz. Marking and measurement functions are available for all spectral measurements suitable for measuring noise power, ACLR, harmonic distortion, occupied bandwidth and emission masks in the spectrum. 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 complementary phase noise analyses. For advanced applications, the receiver can be equipped with a second receive channel, enabling cross-correlation and an increase in sensitivity of up to 25 dB, depending on the number of correlations. Thanks to its excellent internal sources and highly digital architecture, the analyzer's processing speed is faster than those of test systems that digitize the signal after the phase detector. This allows phase and AM noise to be displayed in parallel. Results are obtained more quickly, without the need for a second scan to measure AM noise. Both noise contributions are displayed simultaneously on the screen, so they can be compared during the measurement process.
The R&S FSMR microwave measurement receiver is now available from Rohde & Schwarz.
For more information:
www.rohde-schwarz.com