Rohde and Schwarz FSEB20 Spectrum Analyzer, 20 Hz to 7 GHz

The Rohde & Schwarz FSEB20 is a spectrum analyzer covering 9 kHz to 7 GHz with built-in demodulation and measurement capabilities for signal analysis, research, and development. It delivers a typical displayed noise floor of −150 dBm in 10-Hz bandwidth and achieves total level measurement uncertainty below 1 dB up to 1 GHz and 1.5 dB to 7 GHz. The instrument executes full-span sweeps in 5 ms and zero-span sweeps in 1 microsecond, enabling rapid signal characterization across demanding test environments.

Technical Specifications

• Frequency range: 9 kHz to 7 GHz


• Resolution bandwidths: 1 Hz to 10 MHz (adjustable in 1/2/3/5/10 steps)


• Displayed noise floor: −150 dBm typical (10-Hz bandwidth)


• 3rd-order intercept point: +20 dBm typical


• 1 dB compression point: +10 dBm


• Phase noise: −123 dBc/Hz typical (10 kHz from carrier)


• Total level measurement uncertainty: <1 dB (to 1 GHz), 1.5 dB (to 7 GHz)


• Sweep time: 5 ms (full-span), 1 microsecond (zero-span)


• Internal RF trigger threshold: approximately −20 dBm


• Frequency aging: 1×10⁻⁹ per day (with FSE-B4 option)

Key Features

• CRT display of signal strength versus frequency


• Built-in AM/FM audio demodulator with loudspeaker and headphone connector


• Gated sweep capability


• Modular option architecture for performance scaling


• Support for modulation analysis including BPSK, QPSK, π/4-DQPSK, 8PSK, QAM, MSK, GMSK, 2FSK, AM, FM, and PM

Typical Applications

• Advanced digital communication system testing


• Signal characterization and analysis


• Modulation quality assessment


• EMC and interference measurements


• Research and development

Compatibility & Integration Optional interfaces include Ethernet (Option B16) and 2nd IEC/IEEE interface (Option B17). Measurement enhancement options include vector signal analysis (FSE-B7), tracking generators (FSE-B8 through FSE-B11), phase noise measurement software (FSE-K4), and GSM application firmware (FSE-K10/-K11). Frequency extension to 7 GHz, low phase-noise oscillators, and increased level accuracy are available through dedicated options.