Rohde & Schwarz FSH4 Handheld Spectrum Analyser
Rohde & Schwarz

Rohde & Schwarz FSH4 Handheld Spectrum Analyser

Rohde & Schwarz FSH4 Handheld Spectrum Analyser

Up to 3.6 GHz Model Available


The Rohde & Schwarz FSH4 spectrum analyser is rugged, handy and designed for use in the field. Its low weight, its simple, well-conceived operation concept and the large number of measurement functions make it an indispensable tool for anyone who needs an efficient measuring instrument for outdoor work.
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Rohde & Schwarz FSH4 Handheld Spectrum Analyser Description

The Rohde & Schwarz FSH4 spectrum analyser is rugged, handy and designed for use in the field. Its low weight, its simple, well-conceived operation concept and the large number of measurement functions make it an indispensable tool for anyone who needs an efficient measuring instrument for outdoor work.

The R&S FSH4 provides the most important RF analysis functions that an RF service technician or an installation and maintenance team needs to solve daily routine measurement tasks. For example, it can be used for maintaining or installing transmitter systems, checking cables and antennas, assessing signal quality in broadcasting, radio communications and service, measuring electric field strength or in simple lab applications. The R&S FSH4 can perform any of these tasks quickly, reliably and with high measurement accuracy.

Weighing only 3 kg, the R&S FSH4 is a handy instrument. All frequently used functions have their own function keys and are within fingertip reach. The brilliant colour display is easy to read even under poor lighting conditions, and it has a monochrome mode for extreme conditions.

The capacity of the R&S FSH4 battery enables uninterrupted operation for up to 4.5 hours. The battery is changed within seconds and all connectors are splash-proof.

Rohde & Schwarz FSH4 Key Features

  • Frequency range from 9 kHz to 3.6 GHz
  • High sensitivity (< –141 dBm (1 Hz)), with preamplifier < –161 dBm (1 Hz)
  • 20 MHz demodulation bandwidth for analysing LTE signals
  • Low measurement uncertainty (< 1 dB) ❙ Measurement functions for all important measurement tasks related to the startup and maintenance of transmitter systems
  • Internal tracking generator and VSWR bridge with built-in DC voltage supply (bias)
  • Two-port network analyser
  • Rugged, splash-proof housing for rough work in the field
  • Easy handling due to low weight (3 kg with battery) and easy-to-reach function keys
  • Easy operation thanks to user configurable, automatic test sequences (wizard)

Rohde & Schwarz FSH4 Handheld Spectrum Analyser Description

The Rohde & Schwarz FSH4 spectrum analyser is rugged, handy and designed for use in the field. Its low weight, its simple, well-conceived operation concept and the large number of measurement functions make it an indispensable tool for anyone who needs an efficient measuring instrument for outdoor work.

The R&S FSH4 provides the most important RF analysis functions that an RF service technician or an installation and maintenance team needs to solve daily routine measurement tasks. For example, it can be used for maintaining or installing transmitter systems, checking cables and antennas, assessing signal quality in broadcasting, radio communications and service, measuring electric field strength or in simple lab applications. The R&S FSH4 can perform any of these tasks quickly, reliably and with high measurement accuracy.

Weighing only 3 kg, the R&S FSH4 is a handy instrument. All frequently used functions have their own function keys and are within fingertip reach. The brilliant colour display is easy to read even under poor lighting conditions, and it has a monochrome mode for extreme conditions.

The capacity of the R&S FSH4 battery enables uninterrupted operation for up to 4.5 hours. The battery is changed within seconds and all connectors are splash-proof.

Rohde & Schwarz FSH4 Key Features

  • Frequency range from 9 kHz to 3.6 GHz
  • High sensitivity (< –141 dBm (1 Hz)), with preamplifier < –161 dBm (1 Hz)
  • 20 MHz demodulation bandwidth for analysing LTE signals
  • Low measurement uncertainty (< 1 dB) ❙ Measurement functions for all important measurement tasks related to the startup and maintenance of transmitter systems
  • Internal tracking generator and VSWR bridge with built-in DC voltage supply (bias)
  • Two-port network analyser
  • Rugged, splash-proof housing for rough work in the field
  • Easy handling due to low weight (3 kg with battery) and easy-to-reach function keys
  • Easy operation thanks to user configurable, automatic test sequences (wizard)
Spectrum analysis
  R&S FSH4 R&S FSH8 R&S FSH13 R&S FSH20
Frequency range models .04/.14/.08/
.18/.13/.23/.20/.30		 9 kHz to 3.6 GHz 9 kHz to 8 GHz 9 kHz to 13.6 GHz 9 kHz to 20 GHz
  models .24/.28 100 kHz to 3.6  GHz 100 kHz to 8 GHz – –
Resolution bandwidths   1 Hz to 3 MHz
Displayed average noise level without preamplifier, RBW = 1 Hz (normalised)
  9 kHz to 100 kHz
(models .04/.14/
.08/.18 only)		 < –108 dBm, –118 dBm typ. < –96 dBm, –106 dBm typ.
  100 kHz to 1 MHz < –115 dBm,  –125 dBm typ.
  1 MHz to 10 MHz < –136 dBm,  –144 dBm typ.
  10 MHz to 2 GHz < –141 dBm,  –146 dBm typ.
  2 GHz to 3.6 GHz < –138 dBm,  –143 dBm typ.
  3.6 GHz to 5 GHz – < –142 dBm, –146 dBm typ.
  5 GHz to 6.5 GHz – < –140 dBm, –144 dBm typ.
  6.5 GHz to 13.6 GHz – < –136 dBm, –141 dBm typ.
  13.6 GHz to 18 GHz – – – < –134 dBm,  –139 dBm typ.
  18 GHz to 20 GHz – – – < –130 dBm, –135 dBm typ.
  with preamplifier, RBW = 1 Hz (normalised)
  100 kHz to 1 MHz < –133 dBm,  –143 dBm typ. –
  1 MHz to 10 MHz < –157 dBm,  –161 dBm typ. < –155 dBm, –160 dBm typ.
  10 MHz to 2 GHz < –161 dBm, –165 dBm typ. –
  2 GHz to 3.6 GHz < –159 dBm,  –163 dBm typ. –
  3.6 GHz to 5 GHz – < –155 dBm,  –159 dBm typ.
  5 GHz to 6.5 GHz – < –151 dBm, –155 dBm typ.
  6.5 GHz to 8 GHz – < –147 dBm, –150 dBm typ.
  8 GHz to 13.6 GHz – – < –158 dBm,  –162 dBm typ.
  13.6 GHz to 18 GHz – – < –155 dBm,  –160 dBm typ.
  18 GHz to 20 GHz – – – < –150 dBm,  –155 dBm typ.
Third-order intercept (IP3) 300 MHz to 3.6  GHz > +10 dBm,  +15 dBm typ.
  3.6 GHz to 20 GHz – > +3 dBm,  +10 dBm typ.
Phase noise frequency 500 MHz
  30 kHz carrier offset < –95 dBc (1 Hz), –105 dBc (1 Hz) typ.
  100 kHz carrier offset < –100 dBc (1 Hz),  –110 dBc (1 Hz) typ.
  1 MHz carrier offset < –120 dBc (1 Hz),  –127 dBc (1 Hz) typ.
Detectors – sample, max. peak, min. peak, auto peak, RMS
Level measurement uncertainty 10 MHz < f ≤ 3.6 GHz <1 dB,  0.5 dB typ.
  3.6 MHz < f ≤ 20 GHz – <1.5 dB,  1 dB typ.
Display   6.5" colour LCD with VGA resolution
Battery operating time (without tracking generator) R&S®HA-Z204, 4.5 Ah up to 3 h
  R&S®HA-Z206, 6.75 Ah up to 4.5 h
Dimensions (W × H × D)   194 mm × 300 mm × 69 mm (144 mm)1)
7.6 in × 11.8 in × 2.7 in (5.7 in)
Weight   3 kg (6.6 lb)
Vector network analysis2)/vector voltmeter3)
  R&S®FSH4 R&S®FSH8 R&S®FSH13/20
Frequency range models .24 /.28 /.23 /.30 300 kHz to 3.6 GHz 300 kHz to 8 GHz 100 kHz to 8 GHz
Output power (port 1)   0 dBm to –40 dBm -
Output power (port 2)   0 dBm to –40 dBm 0 dBm to –40 dBm
Reflection measurement (S11, S22)
Directivity 300 kHz to 3 GHz > 43 dB nominal > 43 dB nominal > 43 dB nominal 4)
  3 GHz to 3.6 GHz > 37 dB nominal > 37 dB nominal > 37 dB nominal 4)
  3.6 GHz to 6 GHz – > 37 dB nominal > 37 dB nominal 4)
  6 GHz to 8 GHz – > 31 dB nominal > 31 dB nominal 4)
Display modes vector reflection and transmission measurement (R&S FSH-K42) magnitude, phase, magnitude + phase, Smith chart, VSWR, reflection coefficient, mρ, on-port cable loss, electrical length, group delay
  vector voltmeter (R&S FSH-K45) magnitude + phase, Smith chart
Transmission measurements
Dynamic range (S21) 100 kHz to 300 kHz 70 dB typ. 70 dB typ. -
  300 kHz to 3.6 GHz > 70 dB, 90 dB  typ. > 70 dB, 90 dB  typ. -
  3.6 GHz to 6 GHz – > 70 dB, 90 dB  typ. -
  6 GHz to 8 GHz – 50 dB typ. -
Dynamic range (S12) 100 kHz to 300 kHz 80 dB typ. 80 dB typ. typ. 80 dB
  300 kHz to 3.6 GHz > 80 dB, 100 dB typ. > 80 dB, 100 dB typ. 80 dB, 100 dB typ.
  3.6 – > 80 dB, 100 dB typ. 80 dB, 100 dB typ.
  6 GHz to 8 GHz – 60 dB typ. 60 dB typ.
Display modes vector reflection and transmission measurement (R&S FSH-K42) magnitude (attenuation, gain), phase, magnitude + phase, electrical length, group delay
  vector voltmeter (R&S FSH-K45) magnitude + phase

1) With carrying handle.
2) Available for models .24/.28/.23/.30 only; models .24/.28 require R&S®FSH-K42 additionally.
3) For models .24/.28/.23/.30 only, requires R&S®FSH-K45.
4) Only S22-measurements.