About Us

Founded in 2014, based on decades of experience on testing products

Global support and service capacity

Mainland China: Shenzhen, Shanghai, Xi’an

Asia Pacific: Hong Kong, Taipei, Noida (Delhi, India)

North America: Silicon Valley (USA)

6000+ installed base of One-Box Tester (OBT), currently running on product lines in factories worldwide, purchased or leased

Strive to be world-class testing partner for wireless device manufacturers


Be Founded


Equipment Be Applied




Long-Term Strategic Partners

Product Center

Enhanced Wireless Synthesizer T6290F
The Welzek Wireless Synthesizer T6290F is specially designed and tuned to meet the industry's current and future RF metrics testing needs for Wifi and other short-range communication technologies.
New generation wireless tester T6290U
The new generation of wireless tester T6290U is based on a new hardware platform in order to satisfy  the test  requirements both by current and future RF technology .With excellent performance as  larger bandwidth, lower phase noise, higher frequency and multi radio technology,  T6290U can cover various test scenarios both by R&D and production , which brings more valuable choices for customers.
T6290E Radio Signal Tester
T6290E is a high-performance instrument for RF testing in 5G era. It covers various cellular standards of 2/3/4/5G NR/IOT , short distance radio communication technologies as Bluetooth, GNSS,UWB and Wifi (802.11 series ,including ax/be ( Wifi 6E/7) )and other wideband radio technologies.
K6206 DC Power Supply
K6206/K6206-V20 can offer high precision programmable dual-channel DC power supplier. With capability for max .20V /5A and measurement accuracy for uA, it is widely used for power supply , charging test and weak power test.
T6290D Wireless Tester
T6290D is wireless tester for 4G era, with capability for cellular technology as 2/3/4G/IOT and short distance radio communication technologies as Bluetooth, GNSS, Wifi . With optional bult-in DC Power supply , it can be easily applied for various test requirement.
Power divider S8U
The power divider can divide the input signal into two or more outputs. The S8U power divider can divide the signal into up to 8 channels, and there are 3 models S8U-A, S8U-B, and S8U-C.
TDU Time Delay Unit


  • Automation RF Test
  • Manual RF Test
  • IOT Test
  • Application of Power Supply
Automation Test
The small size and high integration of T6290D/E can contribute a lot with automated test equipment, which has been widely applied for DUT calibration and comprehensive test.
Manual Test
Typical application of using T6290D to build calibration/comprehensive test/assembly test line:T6290D can be used to build a system with the program-controlled power supply and GPIB line, and the connection and configuration are the same as other instruments. Using T6290D's own program-controlled power supply and full network cable control function to build mobile phone calibration, comprehensive testing and assembly test lines can give full play to the features and advantages of the device.
IoT Test Application
Relying on the original factory's development capabilities, Zunxun can provide customized services for various testing needs of module manufacturers to meet the needs of low-cost, large-scale and rapid production of modules.
Application of Power Supply
The K6206 program-controlled power supply can provide two-way power output and current measurement, so it is very suitable for power supply and standby current testing of mobile phones in the production process.