Rohde and Schwarz FSH-Z1 Power Sensor, 10 MHz to 3 GHz

The Rohde & Schwarz FSH-Z1 is an average power sensor that extends the measurement capabilities of Rohde & Schwarz FSH series handheld spectrum analyzers, enabling precise RF power measurement across a wide frequency band. The sensor connects directly to the FSH series via its integrated power sensor interface, transforming the analyzer into a dedicated RF power meter suitable for wireless communications, radar, and general RF testing applications.

Technical Specifications

• Frequency Range: 10 MHz to 8 GHz


• Measurement Range: −67 dBm to +23 dBm (200 pW to 200 mW)


• Signal Type: Average Power (true RMS value measurement)


• Maximum Input Power: 400 mW (+26 dBm) average; 1 W (+30 dBm) peak (< 10 µs, 1 % duty cycle)


• Absolute Measurement Uncertainty (sine signals, no zero offset): - 10 MHz to 8 GHz at +15 °C to +35 °C: < 2.3 % (0.10 dB) - 10 MHz to 8 GHz at 0 °C to +50 °C: < 4.2 % (0.18 dB) - 8 GHz to 18 GHz at +15 °C to +35 °C: < 3.5 % (0.15 dB) - 8 GHz to 18 GHz at 0 °C to +50 °C: < 5.0 % (0.21 dB)


• VSWR: 10 MHz to 30 MHz: < 1.15; 30 MHz to 2.4 GHz: < 1.13; 2.4 GHz to 8 GHz: < 1.20; 8 GHz to 18 GHz: < 1.25


• Harmonic Effect: < 0.5 % (0.02 dB) at 20 dB harmonic ratio


• Modulation Effect: < 1.5 % (0.07 dB) for continuous digital modulation


• Zero Offset After Zeroing: < 110 pW

Key Features

• Compact form factor: 48 mm × 31 mm × 170 mm; weight < 0.3 kg


• 1.5 m connecting cable for field deployment


• True RMS measurement independent of waveform shape


• Low-noise measurement floor supporting sensitivity down to 200 pW


• Direct integration with FSH3, FSH6, and FSH18 spectrum analyzers

Typical Applications Wireless communications power verification, radar system testing, RF component characterization, and field-based power level measurements requiring handheld portability.