Rohde and Schwarz FSH3 100 kHz to 3 GHz Handheld Spectrum Analyzer

The Rohde & Schwarz FSH3.13 (FSH3) is a handheld spectrum analyzer for field and laboratory signal analysis across 100 kHz to 3 GHz. It performs spectrum analysis, interference hunting, component testing, and communication system installation/maintenance in demanding environments. The FSH3 series includes configurable models with optional internal preamplifier, tracking generator, or both - enabling scalar network analysis, distance-to-fault measurements, and power analysis up to 18 GHz with external sensors.

Technical Specifications

Frequency Range: 100 kHz to 3 GHz
RF Input: N connector (female), 50 Ω impedance
Resolution Bandwidth: Model .03 and .23: 100 Hz to 1 MHz; Model .13: 1 kHz to 1 MHz
Video Bandwidth: 10 Hz to 1 MHz
Reference Level: −80 dBm to +20 dBm
Displayed Average Noise Level (DANL): Typically −135 dBm (RBW 100 Hz, models .03/.23); −114 dBm (RBW 1 kHz, model .13)
Level Accuracy: 0.5 dB typical
SSB Phase Noise: < −100 dBc (1 Hz) at 100 kHz offset
Third Order Intercept (TOI): Typically 13 dBm
Detector Types: Sample, max/min peak, auto peak, RMS

Key Features

• Preamplifier (models .03, .23): Adjustable gain across 100 kHz to 3 GHz for weak-signal measurement


• Tracking Generator (models .13, .23): −20 dBm output (model .13); −20 dBm / 0 dBm selectable (model .23) for scalar network analysis and DTF measurements


• Multi-sensor Power Measurement: Compatible with R&S FSH-Z1 sensor (to 8 GHz) and R&S FSH-Z18 sensor (to 18 GHz)


• Vector Network Analysis: Optional via R&S FSH-K2


• Distance-to-Fault Capability: With tracking generator and VSWR Bridge R&S FSH-Z2

Typical Applications Signal monitoring and interference identification; scalar network analysis; component characterization; installation and maintenance of cellular, broadcast, and microwave systems; field-strength and channel power measurements.

Compatibility & Integration Accessories include VSWR bridge (R&S FSH-Z2), external power sensors (R&S FSH-Z1, R&S FSH-Z18), and optional vector network analysis module (R&S FSH-K2).