The Rohde & Schwarz FSH3 is a handheld spectrum analyzer built for field deployment, delivering RF signal analysis from 100 kHz to 3 GHz. Operating on internal NiMH battery (6 V to 9 V) or external DC supply (15 V to 20 V), it provides 4 hours of continuous operation in demanding environments. The unit combines high sensitivity—down to -135 dBm at 100 Hz RBW on select models—with phase noise performance of <-100 dBc/Hz (SSB) at 100 kHz offset, and level accuracy of 0.5 dB typical across its entire frequency span.
Technical Specifications
Frequency Coverage & Signal Detection
• Frequency range: 100 kHz to 3 GHz
• Resolution bandwidth: 100 Hz to 1 MHz (Models .03, .23); 1 kHz to 1 MHz (Model .13)
• Video bandwidth: 10 Hz to 1 MHz; 10 Hz, 10 MHz
• Displayed average noise level: -135 dBm typical (100 Hz RBW, Models .03/.23); -114 dBm typical (1 kHz RBW, Model .13); -116 dBm typical
• SSB phase noise: <-100 dBc/Hz at 100 kHz from carrier
• Third-order intercept: +13 dBm typical
Input & Signal Conditioning
• RF connector: N female, 50 Ω impedance
• VSWR: 1.5 typical (10 MHz to 3 GHz)
• Reference level: -80 dBm to +20 dBm
• Level accuracy: 0.5 dB typical to 3 GHz
• Detectors: Sample, Max/Min Peak, Auto Peak, RMS, Peak
Power & Battery
• Internal battery: NiMH, 6 V to 9 V
• External DC: 15 V to 20 V
• AC supply (optional): 100 V to 240 V AC, 50 Hz to 60 Hz via FSH-Z33
• Battery operating time: 4 hours
– Key Features
Optional Modules
• Tracking generator (Models .13, .23): 5 MHz to 3 GHz output; -20 dBm/-0 dBm selectable (Model .23); -20 dBm (Model .13)
• Preamplifier (Models .03, .23): 100 kHz to 3 GHz with user adjustment
• Power sensors expand range to 8 GHz or 18 GHz; measurement span -67 dBm to +23 dBm
Measurement Functions
• Distance-to-fault, scalar and vector network analysis
• Carrier-to-noise ratio, channel power, spurious emission detection
• EMI emission with CISPR bandwidths (200 Hz, 9 kHz, 120 kHz, 1 MHz)
• Field-strength and interference analysis
– Typical Applications
RF system installation, maintenance, and field troubleshooting across telecommunications, broadcast, and wireless networks operating below 3 GHz.
– Compatibility & Integration
Accepts optional R&S power sensors (FSH-Z1, FSH-Z18, FSH-Z14, FSH-Z44) for extended power measurement. External AC supply (FSH-Z33) available for stationary operation.
