The Rohde & Schwarz FSMR26 is a multi-function measuring receiver that consolidates level calibration, modulation analysis, audio analysis, power metering, and spectrum analysis into a single instrument. Designed for calibration laboratories and RF test environments, it addresses signal generator and attenuator characterization while supporting applications in radar, satellite communications, and wireless systems. The unit eliminates bench clutter by replacing multiple instruments with integrated measurement capabilities.
Technical Specifications
Frequency Range: 20 Hz to 26.5 GHz
Level Calibration
• Measurement Range: +30 dBm to –140 dBm
• Linearity: 0.015 + 0.005 dB / 10 dB or 0.01 dB + 0.005 dB deviation per 10 dB
• Automatic calibration of adjacent ranges eliminates level errors during range switching
• High tolerance to frequency drift and residual FM
Modulation Analysis
• AM: 0% to 100% modulation depth, modulation frequency 50 Hz to 100 kHz, measurement uncertainty 0.5% to 1.5%
• FM: Maximum 500 kHz deviation (100 kHz to 10 MHz carrier), modulation frequency 50 Hz to 200 kHz, measurement uncertainty 1% to 3%, RF FM deviation < 0.2% (nominal)
• PM: Maximum 10,000 rad phase deviation, modulation frequency 50 Hz to 100 kHz, measurement uncertainty 1%
Audio Analysis
• Automatic THD and SINAD measurements
• FFT analysis, audio spectrum, and time-domain display
• Low-pass filters: 3 kHz, 15 kHz, 23 kHz, 100 kHz
• High-pass filters: 20 Hz, 50 Hz, 300 Hz
• Deemphasis filters: 25/50/75/750 µs
• Audio input impedance: 50 Ω / 1 MΩ
• Input level range: Up to 4 V
• Audio frequency range: 20 Hz to 1 MHz
Power Meter
• Supports Rohde & Schwarz NRP-Zxx power sensors
• Controls third-party power meters via IEC/IEEE bus
• Automatic VSWR correction
Spectrum Analyzer
• High-performance integrated analyzer with harmonic and phase noise measurement capability
• Optional YIG preselection filter for full microwave spectrum capability above 3.6 GHz
– Key Features
• Single-unit consolidation reduces measurement setup complexity
• Level measurement from +30 dBm to –140 dBm with 0.01–0.015 dB linearity
• Modulation analysis across AM, FM, and PM with sub-percent uncertainty
• Comprehensive audio analysis including THD, SINAD, and multiple filter options
• Seamless power sensor integration with automatic correction
– Typical Applications
• Signal generator and attenuator calibration
• Modulation quality assessment in wireless systems
• Audio equipment characterization
• Radar and satellite communications testing
– Compatibility & Integration
Connects to Rohde & Schwarz NRP-Zxx power sensors and third-party meters via IEC/IEEE bus interface.
