S4025 Handheld Spectrum Analyzer

S4025D spectrum analyzer is a new generation of high-performance handheld spectrum analyzer, with a frequency measurement range of 9kHz to 20GHz, mainly used for installation and commissioning of wireless communication equipment in the field, maintenance and interference detection, etc. It is small, lightweight, highly adaptable to the environment, flexible in power supply and easy to operate.

S4025D spectrum analyzer with 40MHz real-time spectrum analysis bandwidth is configured with Interference Analysis, Channel Scan, Field Strength Measurement, USB CW and Peak Power Measurement, Analog Demodulation Analysis, Directional Analysis and other measurement function modes, as well as channel power, occupied bandwidth, adjacent channel power, spectrum emission Mask, carrier-to-noise ratio, harmonic distortion, spurious emission Mask, indoor/outdoor map coverage and other intelligent measurement functions. The spectrum analyzer supports LAN, USB, MicroSD card, Wi-Fi wireless communication and other interfaces. The whole machine adopts a 10.1-inch capacitive touch screen, which supports marker dragging, frequency and amplitude dragging and scaling, etc. The product can be applied to mobile communication, satellite communication, radar detection, microwave communication, on-site debugging and installation and maintenance of electronic reconnaissance and countermeasure equipment, interference source direction finding and map positioning, transient time-varying signal testing, etc.

Key Features

Frequency range coverage: 9 kHz to 20 GHz, low frequency can be extended to 5 kHz, full-band pre-amplifier are configured

Low displayed average noise level up to -165dBm @ 1Hz RBW (typical)

Fast scanning speed: 1GHz span fastest sweep time <33ms

Multiple measurement function modes

Standard ull-band pre-amplifier configuration

Various intelligent measurement functions

A wide range of auxiliary test interfaces and digital interfaces

User-friendly operation experience

Excellent field usability

A wide range of optional field test accessories can be configured

Frequency Range

S4025D: 9kHz ~ 20GHz

Frequency Reference

•   Nominal frequency: 10MHz

•   Aging rate: ± 5×10-7 / year

•   Temperature stability: ± 1×10-7 (-20℃~+55℃,Comparative to 25℃±10℃)

Sweep Time

Range: 10μs – 6000s (zero Span),  Accuracy: ± 1.00% (zero span)

Frequency Readout Accuracy

± (frequency readout × frequency reference error + 1% × span + 10% × resolution bandwidth)


1Hz – 20MHz (1, 2 ,3 ,5, steps)


1Hz – 20MHz (1, 2 ,3 ,5, steps)

SSB Phase Noise (Carrier 1GHz, 20℃-30℃)


•    ≤-108 dBc/Hz @ 10kHz offset

•    ≤-110 dBc/Hz @ 100kHz offset

•    ≤-118 dBc/Hz @ 1MHz offset

•    ≤-129 dBc/Hz @ 10MHz offset

Displayed Average Noise Level (Preamplifier Off)

Pre-amplifier ON:

•    ≤-161dBm(2MHz~2.4GHz)

•    ≤-160dBm(2.4GHz~6GHz)

•    ≤-159dBm(6GHz~9GHz)

•    ≤-158dBm(9GHz~14GHz)

•    ≤-156dBm(14GHz~20GHz)

Pre-amplifier OFF:

•    ≤-142dBm(2MHz~2.4GHz)

•    ≤-141dBm(2.4GHz~6GHz)

•    ≤-140dBm(6GHz~9GHz)

•    ≤-138dBm(9GHz~14GHz)

•    ≤-138dBm(14GHz~20GHz)

Second Harmonic Distortion

<-70dBc (50MHz ~ 10GHz)

Absolute Amplitude Accuracy

±1.30 dB (operating temperature: +15℃~+35℃)

Input Attenuator

Attenuation range: 0~30dB, 2dB steps

Reference Level

•    Range: -150dBm~+30dBm, minimum 1dB steps

•    Conversion Uncertainty: ±0.50dB (Reference level: 0dBm~-60dBm)


•    316.5mm(W)×236.5mm(H)×75mm(D) (Without side strap and
interface plug, the back bracket is closed)

•    316.5mm(W)×236.5mm(H)×68mm(D) (Without side strap and
interface plug, the back bracket is closed)



•    3.0kg (without internal battery),

•    3.5kg (with internal battery)

Battery Life


3.5h~4.5h (Depend on the operation mode)

(Note: see more detail information in the ‘Resource’ – ‘Datasheet’)

Main Machine

Module No. Item Description
S4025D Handheld Spectrum Analyzer 9 kHz to 20 GHz


Module No. Item Description
S4025-01 Optional Accessories of English Version English Signs, Keys, Menu
S4025-02 User Manual (Chinese) User Manual Chinese Version
S4025-03 User Manual (English) User Manual English Version
S4025-04 Programming Manual (Chinese) Programming Manual Chinese Version
S4025-05 Programming Manual (English) Programming Manual English Version
S4025-S01 USB CW Power Meter Option CW Power measurement function available with external USB continuous wave power sensor 87230/87231 /87232/87233
S4025-S02 USB Peak Power Meter Option Peak power measurement is available and requires the 87234D/E/F/L USB peak/average power sensor to be used
S4025-S03 Interference Analyzer Option Provides waterfall diagram, RSSI measurements and more
S4025-S04 Channel Scanner Option To Realize Signal Power Measurement of Multiple Channels and Frequency
S4025-S05 Field Strength Option For measuring the radiation intensity of the electric field of the device under test
S4025-S06 Outdoor Map RSSI test and adjacent channel power ratio test can be done under the outdoor interference map, and the test results can be marked on the map in real time according to time or distance, to be used with the S4025-H01 option.
S4025-S07 Indoor Map RSSI and adjacent channel power ratio tests can be carried out under the indoor map, with the results marked on the map by dotting the correlation between signal strength and color.
S4025-S08 Analog Demodulation Realize AM, FM and PM modulation signal analysis and measurement function.
S4025-S09 Zero Span IF Output Output IF signal at zero span
S4025-S10 Time Gated Used for time division interference signal testing
S4025-S11 Directional Analysis Option For locating external sources of interference or unknown signals, to be used in conjunction with the S4025-H01 option, the USB electronic
S4025-S12 40MHz Real-time Spectrum Analysis Provide 40 MHz real-time spectrum analysis function
S4025-S13 List Sweep Realize continuous sweep of multiple frequency bands
S4025-H01 GPS/Bei Dou Location GPS or Bei Dou positioning function can be realized through the external antenna.
S4025-H02 Wi-Fi Communication Option Wireless communication with external devices
S4025-H03 Tie rod aluminum alloy box Tie rod aluminum alloy box
S4025-H04 Pull-rod transport box Pull-rod transport box
S4025-H05 Backpack Portable Backpack
S4025-H06 AAL090K-N029 Power Adapter Power Adapter
S4025-H07 GSA3SA1 9900mAh Lithium rechargeable battery Standby battery pack, nominal voltage 10.8V, battery capacity 9900mAh, not suitable for air transport carry-on.
S4025-H08 GS2040IM 9000mAhIithium-ion rechargeable battery Standby battery pack, nominal voltage 10.8V, battery capacity 9000mAh, suitable for air transport carry-on
S4025-H09 GSCAR19V5525100W Vehicle Power Adaptor Car charger with input voltage 12~24V and output voltage 19V for powering handheld measuring instruments.
S4025-H10 GSCH4000B Smart Battery Charging Base Lithium-ion battery charging stand
S4025-H11 Micro SD Card Kingston MicroSD Class10,capacity: 128G.
S4025-H12 87230 USB CW Power Sensor Frequency range: 9kHz~6GHz, Interface: N(m)
S4025-H13 87231 USB CW Power Sensor Frequency range: 10MHz~18GHz, Interface: N(m)
S4025-H14 87232 USB CW Power Sensor Frequency range: 50MHz~26.5GHz, Interface: 3.5mm(m).
S4025-H15 87233 USB CW Power Sensor Frequency range: 50MHz~40GHz, Interface: 2.4mm(m)
S4025-H16 87234D USB Peak/ CW Power Sensor Frequency range: 50MHz~18GHz, Interface: N(m).
S4025-H17 87234E USB Peak/ CW Power Sensor Frequency range: 50MHz~26.5GHz, Interface: 3.5mm(m).
S4025-H18 87234F USB Peak/ CW Power Sensor Frequency range: 50MHz~40GHz, Interface: 2.4mm(m).
S4025-H19 87234L USB Peak/ CW Power Sensor Frequency range: 500MHz~67GHz, Interface: 1.85mm(m)
S4025-H20 ZE9080A Directional Antenna ZE9080 Antenna Module A,frequency range: 9kHz-20MHz, N(f) (Need option 25)
S4025-H21 ZE9080B Directional Antenna ZE9080 Antenna Module B, frequency range: 20MHz-200MHz, N(f) (Need option 25)
S4025-H22 ZE9080C Directional Antenna ZE9080 Antenna Module C, frequency range: 200MHz-500MHz, N(f) (Need option 25)
S4025-H23 ZE9080D Directional Antenna ZE9080 Antenna Module D, frequency range: 500MHz-8GHz, N(f) (Need option 25)
S4025-H25 ZE9080 Antenna Amplifier ZE9080 Handle Module, frequency range: : 9kHz~8GHz,N(f), can be used with the ZE9080 Antenna Module A/B/C/D option, Internal with amplifier and electronic compass.
S4025-H26 700MHz~6GHz Directional Antenna HyperLOG 7060X,Active Log-periodic Antenna, Frequency: 700MHz~6GHz, Interface: SMA(f).
S4025-H27 680MHz~10GHz Directional Antenna HyperLOG 60100X, Active Log-periodic Antenna, Frequency: 680MHz~10GHz, Interface: SMA(f).
S4025-H28 680MHz~20GHz Directional Antenna HyperLOG 60200X, Active Log-periodic Antenna, Frequency: 680MHz~20GHz, Interface: SMA(f)
S4025-H29 6GHz Omni-directional Antenna OmniLOG 70600, Portable Omni-directional Antenna, Frequency: 680MHz~6GHz, Interface: SMA(m).
S4025-H30 8GHz Omni-directional Antenna OmniLOG 30800, Portable Omni-directional antenna, Frequency: 300MHz~8GHz, Interface: SMA(m)
S4025-H31 Passive Directional Antenna (700MHz~6GHz ) HyperLOG 7060, Passive Log-periodic Antenna, Frequency: 700MHz~6GHz, Interface: SMA(f).
S4025-H32 Passive Directional Antenna (680MHz~10GHz) HyperLOG 60100, Passive Log-periodic Antenna, Frequency: 680MHz~10GHz, Interface: SMA(f)
S4025-H33 Passive Directional Antenna (680MHz~18GHz) HyperLOG 60180, Passive Log-periodic Antenna, Frequency: 680MHz~18GHz, Interface: SMA(f).
S4025-H34 USB Electronic Compass External USB Electronic Compass can be used with HyperLOG 7060X, HyperLOG 60100X, HyperLOG 60200X, S4025-S11 options
S4025-H35 N/SMA-JJ RF Cable(2m) N/SMA (M-M) RF coaxial cable, DC~18GHz, length: 2m
S4025-H36 PBS1 Near-field Probe Maximum frequency: 9 GHz, with 1 electric field probe and 1 each of 6mm, 12mm, 25mm and 50mm magnetic field probes, Interface: SMB(m)
Saluki Technology