Rohde & Schwarz FSP38 9KHz to 38GHz Spectrum Analyzer

The Rohde & Schwarz FSP38 is a spectrum analyzer covering 9 kHz to 40 GHz with exceptional sensitivity and dynamic range for RF and microwave measurements. It delivers 0.01 Hz frequency resolution, a displayed average noise level of –155 dBm (1 Hz BW), and approximately 100 dB dynamic range using RMS detection. The instrument combines multiple detector types

RMS, Quasi-peak, Peak, and Sample - with flexible resolution bandwidth options spanning 1 Hz to 10 MHz, making it ideal for signal analysis, interference detection, and component characterization across defense, aerospace, telecommunications, and laboratory environments.

Technical Specifications

• Frequency Range: 9 kHz to 40 GHz


• Frequency Resolution: 0.01 Hz


• Resolution Bandwidth: 1 Hz to 10 MHz (digital filters 10 Hz–100 kHz; analog filters 300 kHz–10 MHz; FFT filters 1 Hz–30 kHz; 39 channel filters 100 Hz–5 MHz)


• Phase Noise: < –84 dBc/Hz @ 100 Hz offset (typical –90 dBc/Hz); approximately –113 dBc/Hz @ 10 kHz offset


• Displayed Average Noise Level: –155 dBm (1 Hz BW)


• Dynamic Range: Approximately 100 dB (RMS detector)


• Maximum Input Level: 20 dBm (0 dB attenuation); 30 dBm (10 dB or higher attenuation)


• Absolute Level Uncertainty: < 0.2 dB


• Sweep Speed: 2.5 ms minimum


• IF Bandwidth: 20.4 MHz


• Frequency Span: 0 Hz, 10 Hz to 40 GHz with ±0.1% max deviation


• Internal Reference Aging: 1 × 10⁻⁸ per year (after 30 days); Temperature drift (0–50°C): 1 × 10⁻⁷


• External Reference: 10 MHz


• EMI Bandwidths: 200 Hz, 9 kHz, 120 kHz (–6 dB)


• Detectors: RMS, Quasi-peak, Peak, Sample


• Display: 21 cm TFT color


• Operating Temperature: 0°C to 50°C


• Storage Temperature: –40°C to 70°C


• Dimensions: 412 mm × 197 mm × 417 mm


• Weight: Approximately 14 kg

Key Features

• 0.01 Hz frequency resolution for precise signal identification


• phase noise performance with selectable bandwidth control


• Four detector modes supporting EMI and general-purpose measurement workflows


• Frequency counter with 0.1 Hz to 10 kHz selectable resolution


• Marker-based analysis with span/500 resolution capability

Typical Applications

• EMI/RFI compliance and interference characterization


• Component and subsystem RF validation


• Signal monitoring across VLF to millimeter-wave bands


• Laboratory and production test environments

Compatibility & Integration

• Standard interfaces: GPIB, RS-232


• Optional: LAN/USB connectivity


• 10 MHz reference input/output for external synchronization