R&S FSW43 Signal and Spectrum Analyzer
  • R&S FSW43 Signal and Spectrum AnalyzerR&S FSW43 Signal and Spectrum Analyzer
  • R&S FSW43 Signal and Spectrum AnalyzerR&S FSW43 Signal and Spectrum Analyzer
  • R&S FSW43 Signal and Spectrum AnalyzerR&S FSW43 Signal and Spectrum Analyzer
  • R&S FSW43 Signal and Spectrum AnalyzerR&S FSW43 Signal and Spectrum Analyzer
  • R&S FSW43 Signal and Spectrum AnalyzerR&S FSW43 Signal and Spectrum Analyzer

R&S FSW43 Signal and Spectrum Analyzer

Dongguan Qihang Electronic Technology Co.,Ltd. R&S FSW43 Signal and Spectrum Analyzer have characteristic design & practical performance & competitive price, RBW (Resolution Bandwidth): RBW is a parameter used to set the bandwidth of the analyzer's filters. It affects the ability to distinguish closely spaced frequency components in the spectrum.

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Product Description

Dongguan Qihang Electronic Technology Co.,Ltd. R&S FSW43 Signal and Spectrum Analyzer have characteristic design & practical performance & competitive price, VBW (Video Bandwidth): VBW determines the sweep speed and can be adjusted to filter out noise or provide a more accurate representation of the signal.Detector Types: Signal and spectrum analyzers offer various detector types, such as peak, average, and sample detectors, to measure signal amplitudes differently based on the application.

R&S FSW43 Signal and Spectrum Analyzer

Models Frequency range Phase noise Max. analysis band width
R&S®FSW43
Order number 1331.5003.43
2 Hz - 43.5 GHz < –136 dBc (1 Hz)
(f = 1 GHz, 10 kHz offset)
512 MHz


Key facts

Unparalleled low phase noise and best sensitivity on the market

8.3 GHz internal analysis bandwidth

800 MHz real-time analysis bandwidth

SCPI recorder simplifies code generation

High dynamic range enables outstanding EVM performance


Superior RF performance

RF performance that meets exacting demands

The R&S FSW43 Signal and Spectrum Analyzer redefines the top-of-the-line signal and spectrum analyzers, offering superior RF phase noise, displayed average noise level, intermodulation suppression and dynamic range for ACLR and harmonic measurements.

Phase noise

Phase noise at 10 GHz carrier frequency at 10 kHz offset from the carrier: typ. –133 dBc (1 Hz).


Advanced user interface

Designed for convenience

12.1’’ high resolution, multitouch display with gesture support - flat design with Windows 10 look and feel

Various measurements can be displayed simultaneously in separate windows, which makes result interpretation easier

Embedded SCPI recorder simplifies code generation for automatic, remote controlled measurements

Convenient user interface

Advanced R&S®FSW with 12.1 inch high resolution, multitouch display and much more.


Keep up-to-date in 5G development

In-depth 5G physical layer signal analysis

The R&S®FSW scalable, wide internal analysis bandwidth of up to 8.3 GHz allows you to capture the entire bandwidth of the downlink signal and evaluate the complete system.

R&S®FSW-K144 and R&S®FSW-K145 options cover downlink and uplink in-band measurements of 3GPP 5G NR. Each signal subframe is analyzed and a wide range of measurement results are provided, including the EVM, frequency and power of different channels and signals.

R&S®FSW-K144 5G New Radio downlink application

R&S®FSW-K144 detects and sets many parameters automatically, giving you more time to concentrate on insights from the detailed analysis.


Extensive radar analysis functions

Fast and comprehensive radar signal analysis

In addition to wide analysis bandwidth (up to 8.3 GHz), R&S®FSW analysis functions essential for radar testing.

The R&S®FSW-K6 pulse measurement application measures all relevant pulse parameters at the touch of a key

The R&S®FSW-K6S time sidelobe measurement option measures pulse compression parameters

The R&S®FSW-K60/K60H option analyzes frequency hopping signals

R&S®FSW-K6 pulse measurement option

The R&S®FSW-K6 pulse measurement application measures all relevant pulse parameters at the touch of a button.


Automotive radar signal analysis

Image-free wideband signal analysis in the E band

The R&S®FSW85 signal and spectrum analyzer features a YIG preselector for frequencies between 8 GHz and 85 GHz, providing image-free spectrum analysis. The wide analysis bandwidth (up to 8.3 GHz) combined with the R&S®FSW-K60/-K60C transient analysis/chirp measurement option allows you to characterize up to 5 GHz wide FMCW signals such as those used in automotive radars.

Automotive radar measurements

FMCW signal with 2 GHz bandwidth at 77 GHz measured with the R&S®FSW-K60C option and the R&S®FSW-B2001 2 GHz internal bandwidth extension


Ideal for satellite RF testing

High-performance measurement solutions for designing, developing and testing satellite payloads, payload subsystems and components

The R&S®FSW offers dedicated measurement applications for the most critical measurements such as group delay, linearity, gain transfer, noise power ratio (NPR), etc. It also demodulates satellite RF signals of several standards such as DVB-S2X and OneWeb. The R&S®FSW scalable, wide analysis bandwidth (up to 8.3 GHz) meets the increasing demand for wide signal bandwidths.

R&S®FSW-K17 multicarrier group delay measurements

Measures absolute and relative group delay with high accuracy within milliseconds.


Real-time spectrum analysis

Don’t miss a thing with the real-time spectrum analysis option

The R&S®FSW real-time options allow users to reliably detect extremely short sporadic interference in the nanosecond range even in close proximity to powerful carriers – in a bandwidth of up to 800 MHz. Real-time spectrum analysis enables users to analyze existing frequency hopping algorithms and create alternative ones to prevent collisions between signals of different standards operating in the same frequency band.

Real-time spectrum of the ISM band at 2.4 GHz

Analyzes and prevents collisions between signals of different standards operating in the same frequency band (e.g. WLAN and Bluetooth®).


Powerful vector signal analysis application

Digital signal analysis

The R&S®FSW-K70 vector signal analysis option enables users to flexibly analyze digitally modulated single carriers down to the bit level. The clearly structured operating concept simplifies measurements despite a wide range of analysis tools.The R&S®FSW-K70M allows analysis of signals with two different modulation schemes, such as DVB-S2X signals.The R&S®FSW-K70P extension measures the raw bit error rate (BER) on PRBS data up to PRBS23.

Analysis of a 1024QAM modulated signal

Constellation diagram, result table, symbol table and EVM distribution.


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