The R&S®FSU is a high-performance spectrum analyzer with outstanding performance in phase noise, dynamic range and measurement accuracy that meets any challenge in RF analysis – in aerospace and defense or for general microwave applications up to 67 GHz.

To handle the wide variety of measurement tasks in product development, an instrument must offer ample functionality and excellent performance in all areas of interest. The R&S®FSU fully meets these requirements.

Its wide dynamic range makes the R&S®FSU an ideal tool for base station development and testing. That plus the excellent characteristics already incorporated in the standard model, e.g.

• 3.6/8/26/43/46/50/67 GHz

• TOI > 20 dBm, typ. +25 dBm

• 1 dB compression: +13 dBm (0 dB RF attenuation)

• Displayed average noise level: –152 dBm at 2 GHz; –148 dBm at 26 GHz (1 Hz bandwidth)

• Typ. 77 dB ACLR for 3GPP, typ. 84 dB with noise correction

• Phase noise: typ. –160 dBc (1 Hz) at 10 MHz carrier offset

• Noise correction

• Features & Benefits

• Fast time domain power measurement

• List mode: combined measurement of various parameters with a single command

• Up to 70 measurements/s in zero span via IEC/IEEE bus, including trace data transfer

• Fast frequency counter: 0.1 Hz resolution for a measurement time of 

• Short test cycles, high throughput

• 859x/8566-compatible IEC/IEEE bus command set

• High measurement speed

• Direct frequency range up to 67 GHz

• Easy expansion of the frequency range to 110 GHz with external mixers from 

  Rohde & Schwarz

• Support of external mixers up to 1 THz

• Measuring frequency deviation after settling

• Power measurement

• Scalar network analysis with wide dynamic range

• Full choice of detectors

• Versatile resolution filters

• Full range of analysis functions

• High dynamic range

• Shorter development cycles through versatile functions, wide dynamic range and performance

• Innovative solutions through customized options

• Spectrum analysis up to 67 GHz/110 GHz

• High throughput in production

• Specifications

• 	R&S®FSU3	R&S®FSU8	R&S®FSU26	R&S®FSU43
  Frequency range	20 Hz to 3.6 GHz	20 Hz to 8 GHz	20 Hz to 26.5 GHz	20 Hz to 43 GHz
  Reference frequency	aging: 1 x 10 –7/year, with R&S®FSU-B4 option: 3 x 10 –8/year
  Spectral purity
  Phase noise	typ. –133 dBc (1 Hz) at 640 MHz in 10 kHz from carrier
  Sweep time
  Span ≥10 Hz	2.5 ms to 16 000 s
  Span 0 Hz (zero span)	1 μs to 16 000 s
  Resolution bandwidth	10 Hz to 50 MHz (R&S®FSU43: 10 Hz to 10 MHz), FFT filter: 1 Hz to 30 kHz, channel filter, EMI bandwidth
  Video bandwidth	1 Hz to 10 MHz
  Display range	displayed average noise level to +30 dBm
  Displayed average noise level (1 Hz RBW)
  1 GHz	typ. –158 dBm	typ. –158 dBm	typ. –156 dBm	typ. –156 dBm
  7 GHz	−	typ. –154 dBm	typ. –156 dBm	typ. –153 dBm
  13 GHz	−	−	typ. –153 dBm	typ. –153 dBm
  26 GHz	−	−	−	typ. –148 dBm
  40 GHz	−	−	−	typ. –143 dBm
  Displayed averagenoise level with preamplifier ON  (R&S®FSU-B25), 1 GHz, 1 Hz RBW	< –162 dBm	< –162 dBm	< –162 dBm	< –162 dBm
  Displayed averagenoise level with preamplifier ON  (R&S®FSU-B24), 26 GHz, 10 Hz RBW	−	−	typ. –166 dBm	typ. –166 dBm
  Trace detectors	Max Peak, Min Peak, Auto Peak, Sample, RMS, Average, Quasi Peak, CISPR-AV, CISPR-RMS
  Total measurement error, f < 3.6 GHz	0.3 dB
  Display linearity	0.1 dB (0 dB to –70 dB)

  	R&S®FSU46	R&S®FSU50	R&S®FSU67
  Frequency range	20 Hz to 46 GHz	20 Hz to 50 GHz	20 Hz to 67 GHz
  Reference frequency	aging: 1 x 10 –7/year, with R&S®FSU-B4 option: 3 x 10 –8/year
  Spectral purity
  Phase noise	typ. –133 dBc (1 Hz) at 640 MHz in 10 kHz from carrier
  Sweep time
  Span ≥ 10 Hz	2.5 ms to 16 000 s
  Span 0 Hz (zero span)	1 μs to 16 000 s
  Resolution bandwidth	10 Hz to 50 MHz (R&S®FSU43: 10 Hz to 10 MHz), FFT filter: 1 Hz to 30 kHz, channel filter, EMI bandwidth
  Video bandwidth	1 Hz to 10 MHz
  Display range	displayed average noise level to +30 dBm
  Displayed average noise level (1 Hz RBW)
  1 GHz	typ. –156 dBm	typ. –156 dBm	typ. –152 dBm
  7 GHz	typ. –153 dBm	typ. –153 dBm	typ. –148 dBm
  13 GHz	typ. –153 dBm	typ. –153 dBm	typ. –148 dBm
  26 GHz	typ. –148 dBm	typ. –148 dBm	typ. –142 dBm
  40 GHz	typ. –143 dBm	typ. –136 dBm	typ. –142 dBm
  50 GHz	–	typ. –131 dBm	typ. –140 dBm
  60 GHz	–	–	typ. –132 dBm
  Displayed averagenoise level with preamplifier ON  (R&S®FSU-B25), 1 GHz, 1 Hz RBW	< –162 dBm	< –162 dBm	−
  Displayed averagenoise level with preamplifier ON  (R&S®FSU-B24), 26 GHz, 10 Hz RBW	typ. –166 dBm	typ. –166 dBm	−
  Trace detectors	Max Peak, Min Peak, Auto Peak, Sample, RMS, Average, Quasi Peak, CISPR-AV, CISPR-RMS
  Total measurement error, f < 3.6 GHz	0.3 dB
  Display linearity	0.1 dB (0 dB to –70 dB)