STE5125 Ramsey Shield Box

The STE5125 Ramsey Shield Box is a blank enclosure ready to be customized to match your specific RF testing requirements. Our Engineering team is available to assist you in customizing the STE5125 Ramsey Shield Box to make sure your custom enclosure is designed to meet your unique RF testing requirements. This enclosure does incorporate a 120mm passive ventilation system with optional 12 volt DC, 115 VAC, or 230VAC fans available. As with all of our enclosures, your custom I/O configuration is brought out to a precision machined I/O panel, giving you off the shelf delivery of your custom order.

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SKU: STE5125 Categories: , ,


STE5125 Ramsey Shield Box Key Benefits

  • Designed for a wide variety of RF testing, function/s determined by user  customization.
  • Perfect for 802.11a, b, g, n, ac, and ax
  • Wireless device testing
  • Bluetooth, RFID, 3G, 4G, 5G testing
  • Totally customizable with a wide variety of I/O options available

The STE5125bRamsey Shield Box is constructed of type 304 stainless steel, and lined with microwave absorbent foam. Our unique double lip gasket closure maintains maximum shielding while allowing a full 24″ x 18″ opening. Heavy-duty hinges and latches plus interior bracing ensures the physical integrity of the enclosure. RF attenuation is -110dB at 1GHz, and -80dB at 18GHz. A 3.5″ x 6″ precision machined removable 304 stainless steel IO panel has been integrated into the design of the enclosure like the STE5000.

Additional information

Weight 61.2 kg
Dimensions 23.6 × 23.3 × 23.2 in


Internal Depth

20in and greater

Internal Height


Internal Width

18in and greater




  • Designed for WLAN testing
  • Front loading swing away door
  • Dual ventilation standard or fan forced cooling optional.
  • Exclusive double lip RF tight gasket
  • Universal I/O connector interface plate
  • Insertion Loss RF absorbent foam liner Standard
  • Reflection Loss solutions available
  • Optional security locking latch available

Isolation, may vary depending on I/O or options selected in final configuration

  • >95dB  To 3GHz
  • >90dB  To 6GHz

IO Configurations

Custom Configuration Options

  • FIBER OPTIC: Fiber optic bulkhead feedthrough, ST, FC
  • DUST COVERS: Dust cover capes with security chains available for all RF feedthrough connectors
  • RF FILTERED DATA: DB9 (10pF), DB9 (100pF), DB9 (1000pF), DB15 (100pF), DB15 (1000pF), DB25 (310pF), DB25 (1000pF), DB37 (310pF), DB37 (1000pF), RJ45/DB9 Filtered, RJ11/DB9 Filtered, USB1/DB9 Filtered
  • POWER CONNECTIONS: 4-Pole filtered barrier strip feed through, 6-Pole filtered barrier strip feed through, internal surge protected power strips (110VAC, 220VAC International)
  • VENTILATION OPTIONS: Dual side mounted RF filtered vents with single filtered exhaust muffin fan, passive vent only
  • RF ABSORBENT FOAM: Standard 1/2″ thick RF absorbent foram liner provides 24dB attenuation. 3/4″ thick foam is standard on the STE3800 and available as an option to provide a flatter response
  • FIBER TRANSCEIVER: Icron Technologies USB 2.0 Fiber Transceiver System available for devices up to 480 MB/s

Note: RF Isolation specs are measured at 1M with terminated RF feedthrough coaxial connectors installed. Actual isolation & attenuation can be affected by adding additional filtered and non-filtered connectors. Check with us for specific connector specifications. STE series I/O interfaces, connectors, and options are frequently updated. Check with us for updates. [table “” not found /]