The Rohde & Schwarz FSH8 is a handheld spectrum analyzer engineered for field-based RF measurements across 9 kHz to 8 GHz. This instrument delivers laboratory-grade sensitivity and measurement accuracy in a portable form factor, supporting signal monitoring, interference identification, RF component characterization, and network analysis. System integrators, field service technicians, and laboratory personnel rely on the FSH8 for demanding measurement tasks requiring sub-decibel amplitude accuracy and minimal phase noise.
Technical Specifications
Frequency Range: 9 kHz to 8 GHz (100 kHz to 8 GHz for FSH8.28 variant)
Sensitivity (DANL): ≤ −141 dBm (1 Hz) baseline; ≤ −161 dBm (1 Hz) with preamplifier; −163 dBm/Hz at 1 GHz with preamp enabled
Amplitude Accuracy: < 0.5 dB; measurement uncertainty typically < 1 dB
Resolution Bandwidth: 1 Hz to 300 kHz
Phase Noise (SSB @ f = 500 MHz): 54 dBc (TOI > +7 dBm, typ. +11 dBm)
Sweep Points: 631
Frequency Counter Resolution: 0.1 Hz
Reference Frequency: Internal aging ±1 × 10⁻⁶/year; temperature stability (0–50 °C) ±3 × 10⁻⁶; ±2.5 with optional GPS receiver
– Key Features
• Multiple detectors: max. peak, min. peak, auto peak, sample, RMS
• AM and FM demodulation capability
• Integrated tracking generator (model-dependent)
• Two-port scalar or vector network analysis with optional modules
• Directional power measurement to 4 GHz; expandable to 8 GHz or 18 GHz with external power sensors
• Integrated VSWR bridge on specific variants
• Sweep times from 200 µs to 1000 s depending on span
– Typical Applications
• Field interference detection and source localization
• RF component validation and acceptance testing
• Network analyzer measurements for transmission line and component characterization
• In-situ power and signal quality assessment
– Compatibility & Integration
The FSH8 accepts optional external power sensors (R&S®FSH-Z1, R&S®FSH-Z18) for extended frequency coverage and precision power measurement. GPS frequency reference module (R&S®HA-Z240) available for enhanced frequency stability.
