Rohde & Schwarz Signal and Spectrum Analyzers
7 models with full specifications in Analyzers Signal.
This page summarizes Rohde & Schwarz signal and spectrum analyzers across the manufacturer's core families and explains how to pick among them for development, verification and calibration tasks. The FSW family spans from compact low‑frequency to mmWave coverage (example: FSW8 to 8 GHz, FSW26 to 26.5 GHz and FSW43 to 43.5 GHz) and emphasizes low phase noise and configurable analysis bandwidth. The FSQ26 combines spectrum and vector‑signal analysis with extended demodulation bandwidth options. The FSIQ is an earlier combined spectrum/vector analyzer series. The FSV4 is positioned for fast, general‑purpose measurements to 4 GHz. The FSMR26 is a measuring receiver for high‑accuracy level and frequency reference work. Use frequency span, required analysis/IQ bandwidth, phase noise/DANL and measurement uncertainty to narrow the selection.
- FSW43 frequency range
- 2 Hz to 43.5 GHz (DC coupled)
- FSW26 maximum analysis bandwidth
- Up to 2 GHz (with options)
- FSW8 sensitivity (DANL)
- -156 dBm (1 Hz) typical at 2 GHz and 8 GHz
- FSQ26 demodulation bandwidth
- 28 MHz standard, 120 MHz optional
- FSV4 frequency range
- 10 Hz to 4 GHz
All models
| Model | Type | Display | Dimensions (W×H×D) | Frequency Range |
|---|---|---|---|---|
| FSIQ | *misc | 24 cm (9.5-inch) color TFT LCD | 435 × 236 × 460 | 20 Hz to 3.5 GHz (FSIQ3) / 7 GHz (FSIQ7) / 26.5 GHz (FSIQ26) |
| FSQ26 | *misc | 8.4-inch color SVGA TFT LCD | 435 × 192 × 460 | 20 Hz to 26.5 GHz |
| FSW8 | *misc | 12.1-inch (31 cm) high-resolution touchscreen | 462 mm × 240 mm × 504 mm | 2 Hz to 8 GHz |
| FSW43 | *misc | 12.1" (31 cm) WXGA touchscreen | — | — |
| FSW26 | *misc | 12.1" (31 cm) high-resolution touchscreen | 462 mm × 240 mm × 504 mm | 2 Hz to 26.5 GHz |
| FSMR26 | Measuring Receivers | 21 cm (8.4 in) TFT color LCD, SVGA (800 x 600 pixels) | 435 mm × 192 mm × 460 mm | 20 Hz to 26.5 GHz |
| FSV4 | *misc | 8.4" color TFT touchscreen, SVGA (800 × 600 pixels) | 412 mm × 197 mm × 417 mm | 10 Hz to 4 GHz |
How the Rohde & Schwarz range is structured
The product families group by intended application and frequency/analysis bandwidth capability. The FSW family targets high‑performance RF and microwave measurements with models that trade maximum frequency for analysis bandwidth and phase‑noise performance (examples: FSW8, FSW26, FSW43). The FSQ line (example: FSQ26) combines vector and spectrum capabilities with substantial ACLR and demodulation options. The FSV4 is a compact, general‑purpose signal and spectrum analyzer for up to 4 GHz. The FSMR26 is a dedicated measuring receiver with high reference accuracy and calibration‑oriented interfaces. The FSIQ series is an older combined spectrum/vector instrument with integrated storage and a 9.5‑inch display.
Key technical differentiators to compare
Frequency range — choose the model that covers the RF band under test (FSV4 to 4 GHz, FSW8 to 8 GHz, FSW26 to 26.5 GHz, FSW43 to 43.5 GHz).
Analysis and I/Q bandwidth — some FSW and FSW26 models offer options that extend I/Q demodulation to tens or hundreds of megahertz; FSW26 lists I/Q options up to 512 MHz and a maximum analysis bandwidth of 2 GHz, while FSQ26 provides 28 MHz standard and a 120 MHz option.
Noise floor and dynamic range — FSW models report deep DANL figures (FSW8: typically −156 dBm/Hz at 2 GHz and 8 GHz, and lower with noise cancellation and preamplifier options). FSQ26 documents ACLR performance (77 dB; 84 dB with noise correction) and strong TOI and phase‑noise specs for demanding modulation measurements.
Measurement accuracy and calibration — measuring receivers such as the FSMR26 include reference outputs and stability/aging specifications suitable for calibrating generators and attenuators.
How to choose a model for your application
Start with the frequency band and the analysis bandwidth you need: if you need mmWave coverage up to 43.5 GHz choose an FSW43; if you need the largest configurable analysis bandwidth and wide RF coverage to 26.5 GHz consider the FSW26. For general lab or production measurements up to 4 GHz the FSV4 is sized for fast, routine measurements. If ACLR, wideband demodulation and vector analysis are primary requirements, the FSQ26 combines those capabilities with up to 120 MHz demodulation option. For traceable level and frequency reference work, select the FSMR26 with its 10 MHz reference output and specified aging/stability figures. Also consider phase noise and DANL specs when measuring low‑level signals or crowded spectra.
Popular models
Frequently asked questions
- Which model covers the highest RF frequency?
- The FSW43 covers the highest listed range: 2 Hz to 43.5 GHz (DC coupled).
- Which analyzer provides the largest optional analysis/IQ bandwidth?
- The FSW26 lists a maximum analysis bandwidth of up to 2 GHz with options and I/Q demodulation bandwidth options up to 512 MHz.
- Which instrument is intended for reference and calibration work?
- The FSMR26 is a measuring receiver designed for calibration tasks; it provides a 10 MHz reference output and specifies reference aging and stability for precise level and frequency measurements.