Core Series: FSW Signal and Spectrum Analyzers
The FSW series represents Rohde & Schwarz's high-end and flagship signal analyzers, renowned for their extremely wide analysis bandwidth, exceptionally high dynamic range, and outstanding phase noise performance. They are primarily used for demanding research and development applications.

Common Features:

High Performance: Top-tier RF specifications to meet the most stringent measurement requirements.

Large Bandwidth: Supports analysis bandwidths up to 2 GHz or even 8.1 GHz for analyzing wideband signals such as 5G NR, radar, and satellite signals.

Wide Frequency Coverage: Maximum frequency up to 85 GHz (FSW85), expandable to terahertz (THz) ranges with external mixers.

All-in-One Platform: In addition to spectrum analysis, it typically integrates multiple functions such as vector signal analysis (VSA), phase noise measurement, and noise figure measurement.

Interpretation of the Models You Listed:
FSW8: Base model with a frequency range up to 8 GHz.

FSW13: Model with a frequency range up to 13.6 GHz.

FSW26: Model with a frequency range up to 26.5 GHz. This is a very common model covering the K-band.

FSW43: Model with a frequency range up to 43.5 GHz.

FSW50: Model with a frequency range up to 50 GHz.

FSW67: Model with a frequency range up to 67 GHz (typically refers to FSW67, covering the V-band).

FSW85: Model with a frequency range up to 85 GHz (typically refers to FSW85, covering the E-band). This is the highest-frequency built-in model in the series.
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