The Rohde & Schwarz FSMR43 is a measuring receiver that combines signal analysis, power measurement, and modulation analysis in a single instrument spanning 20 Hz to 43 GHz. It serves as a precision level calibrator for signal generators and attenuators, integrates power sensor connectivity for absolute RF power measurements, and provides integrated AM, FM, and phase modulation analysis. The instrument delivers high accuracy across wide dynamic ranges, making it essential for calibration and signal verification in aerospace, defense, and telecommunications environments.
Technical Specifications
Frequency Range: 20 Hz to 43 GHz
Level Calibration & Measurement:
• Measurement range: +30 dBm to –140 dBm (frequency-dependent)
• Linearity: ±0.01 dB ± 0.005 dB per 10 dB step (+20 dBm to –140 dBm)
• Alternative linearity specification: ±0.015 dB (±0.005 dB deviation per 10 dB step)
• RF level calibration warm-up time: 60 minutes
• Automatic YIG filter and crystal filter bypass during level calibration to eliminate drift and nonlinear response
• High tolerance to frequency drift and residual FM
Power Measurement:
• Direct connection of R&S®NRP-Zxx power sensor modules
• Integrated power splitter in sensor module
• Automatic VSWR correction
• Front panel, IEC/IEEE bus, and LAN control
• Compatible with R&S®NRP-Z27 and R&S®NRP-Z37 power sensor configurations
Analog Modulation Analysis:
• AM: Modulation depth 0–100%; uncertainty 1% of reading (50 Hz–50 kHz), 0.4% of reading (90–150 Hz) for 5–99% depth range
• FM: Frequency deviation to 500 kHz; uncertainty 0.2% nominal for 100 kHz–10 MHz deviation; modulation frequency 10 Hz–100 kHz
• Phase modulation (φM) measurement capability
• Measurement uncertainty <1% across modulation modes
– Key Features
• Wide dynamic range with high linearity across extended measurement intervals
• Level stability and calibration traceability via precision A/D converter
• Simple operation for level calibration over broad level ranges
• Power meter functionality via R&S®NRP-Zxx sensor compatibility
– Typical Applications
• Calibration of RF signal generators and attenuators
• Power and modulation verification in defense and aerospace systems
• Telecommunications signal validation
• Multi-domain measurement requiring single-instrument integration
– Compatibility & Integration
Connects directly to R&S®NRP-Zxx power sensor family with integrated power splitter for absolute RF power measurements.
