Rohde & Schwarz FS315 3GHz – 200Hz 9KHz Spectrum Analyzer

The Rohde & Schwarz FS315 is a 9 kHz to 3 GHz spectrum analyzer built for signal analysis, interference hunting, EMC testing, and scalar network analysis across laboratory, service, and production environments. Modern digital frequency processing delivers measurement accuracy with favorable price-performance. The instrument integrates a tracking generator for transmission and reflection measurements, functions as a fixed-frequency signal generator, and performs electric field strength measurements with antenna factor correction.

A user-selectable frequency offset accommodates measurements on frequency-converting devices such as mixers.

Technical Specifications

Frequency Range: 9 kHz to 3 GHz Resolution Bandwidths: 200 Hz minimum to 20 MHz maximum Video Bandwidths: 10 Hz to 20 MHz Displayed Average Noise Level (DANL): <–110 dBm; typically –115 dBm with 300 Hz RBW Maximum Input Level: +33 dBm Intermodulation-Free Dynamic Range (Third-Order): <–70 dBc at –36 dBm input SSB Phase Noise: <–90 dBc (1 Hz) at 10 kHz offset Level Uncertainty: <1.0 dB (frequency response, RF attenuation 0 dB to 70 dB); <1.5 dB typical 0.7 dB Inherent Spurious: <–85 dBm (RF attenuation 0 dB, input terminated) Frequency Counter Resolution: 1 Hz Display: 5.4-inch active TFT color, 320 × 240 pixels Power Supply: 100 V to 240 V AC, 50 Hz to 60 Hz

Key Features

• Trace detectors: Sample, Max Peak, Min Peak, Average, RMS


• One active trace with stored trace capability


• Single marker and delta marker functionality


• Tracking generator (9 kHz to 3 GHz) with user-selectable frequency offset 0 Hz to 3 GHz


• VSWR measurements with optional bridge


• AM/FM audio demodulator output

Measurement Functions

• Third Order Intercept (TOI)


• TDMA power analysis


• Occupied bandwidth (OBW)


• Return loss and transmission measurements


• Channel power and noise marker analysis


• Electric field strength with antenna factors

Compatibility & Integration USB remote control, external monitor connector, keyboard connector, and headphone output enable flexible bench and automated test configurations.