5211 Wireless Interface Test System
ETS-Lindgren's Model 5211 Wireless Interface Test System, (WITS™), is a self-contained portable enclosure that can check cell phone transmit and receive functionality with or without direct cable connection to the RF or data ports.



​ETS-Lindgren's Model 5211 Wireless Interface Test System, (WITS), is a self-contained portable enclosure that can check cell phone transmit and receive functionality with or without direct cable connection to the RF or data ports. This is accomplished using a patent-pending near field coupler in the enclosure that couples with the phone’s own antenna. The coupling coefficient has a flat response over the frequency range of 700 MHz to 2 GHz.

With this Common Air Interface (CAI), the operator performs the test faster and simulates a real-world environment. In contrast, the direct connection method bypasses the antenna and adds up to several dB of loss to the measurement. The CAI method provides a shorter signal path and readily detects a faulty antenna. (A connector is provided for testing with a direct connection if desired.) To eliminate nulls and hot spots, each enclosure is lined with ETS-Lindgren RF absorber, which improves test repeatability. Compressible RF gasketing is used to seal the lid on closure. Nominal shielding effectiveness >80 dB, although higher values are possible.

Consistent orientation of the phone in the enclosure is important for test repeatability. To help the operator position the phone correctly, a sliding clamp and alignment post are built into the bottom of the enclosure. The base is also marked with an illustration of a typical phone position. The enclosure includes one external Type N connector, which links the antenna coupler to the test set; one Type N connector feed through for traditional direct connection testing; and a 9-pin filtered D-sub connector for more advanced test procedures.

Key Product Information

Specifications Select a tab below for more information

Frequency Minimum: 700 MHz 
Frequency Maximum: 2 GHz 
Coupling Factor: 1850 MHz to 1990 MHz <11 dB; 824 MHz - 894 MHz <8dB
Note: Typical, to Resonant Dipole 1 in. from Coupler Surface 
Typical Coupling Factor Repeatability: ±1 dB 
Typical Internal RF Absorption: 1800 to 2000 MHz Q<2;
800 to 1000 MHz Q<2 
Typical RF Isolation: 1 MHz to 2 GHz >80 dB
External Height: 22.8 cm (8.98 in)
External Length: 49.5 cm (19.49 in)  
External Width: 35.5 cm (13.98 in)  
Internal Height: 8.25 cm (3.25 in)  
Internal Length: 37.46 cm (14.75 in)  
Internal Weight: 20.32 cm (8.00 in)  
Maximum Phone Body Size Height: 8.2 cm (3.23 in)  
Maximum Phone Body Size Length: 19.0 cm (7.48 in)  
Maximum Phone Body Size Width: 7.6 cm (2.99 in)  
Maximum Phone Weight: 6.8 kg (14.99 lb)
Antenna Coupler: Type N Female, External
Calibration and Repair Coupler: Type N Female, Internal and External
DC/Audio Coupler: Filtered dB9, Internal and External



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Key Features

  • Works with Mobile/Cellular Radio Test Sets
  • >80 dB Typical RF Isolation 
  • On-The-Air Test TX, RX Functionality Without Direct Cable connection to Cell Phone Data Port 
  • Flat Coupling Response over 700 MHz to 2 GHz 
  • Custom Configurations Available

Literature and Videos



http://www.ets-lindgren.com/products/test-enclosures/14000/1400007<a href="/sites/etsauthor/ProductBrochures/General%20Brochures/Test_and_Measurement_Full_Line.pdf"><img alt="" src="/_layouts/15/IMAGES/icpdf.png" />Test_and_Measurement_Full_Line.pdf</a>




L o a d i n g

 Catalog-Item Reuse