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.
