Economical EMI tent enclosures for benchtop precompliance tests

The TekBox TBST120/60/60/2 Shielded Tent provides an economical RF/EMI-attenuated environment for a variety of bench-top “EMI quiet” applications. The TBST-120/60/60/2 is a compact shielded tent, designed to suppress interference from ambient noise during EMC pre-compliance measurements. With an outer dimension of 4x2x2 ft., it can accommodate pre-compliance test equipment such as LISNs or TEM-cells or others as well as the device under test, yet easily fit on a test bench.

The TBST-120/60/60/2 shielded tent has been designed with two layers of conductive fabric, suspended on rigid aluminum supports, the double-layer design significantly improving the tent’s shielding effectiveness. A filter panel mounted at the side provides one 240-V/10-A ac filter, two 240-V/10-A dc filters, and four coaxial feed through adapters with screw caps. The front opening provides access to the test space and is closed using conductive hook-and-loop tape in order to avoid compromising the shielding efficacy.

When measuring the conducted noise spectrum of a powered device being tested in an unshielded setup, conducted noise to be measured is often hidden below the ambient noise level, making accurate measurements impossible without eliminating the interference. Most shielded environments have previously been prohibitively expensive for many situations, but the TekBox shielded solution is now available at under $2,000.

Specifications
Outer dimensions: 47.25x24x24 in.
Opening: 33.5×13.8 in.
Frame: 0.8×0.8-in. extruded aluminum supports
Shielding: Two layers of conductive fabric
Seal: conductive Velcro tape
Suspension: Velcro strips
Filter panel: 1 x 240-V/10-A ac filter; IEC socket
2 x 240-V/10-A dc filter; cables with female Banana couplers¬¬¬
3 x N- female feed-through connector with screw caps
1 x BNC-female feed through connector
Attenuation: >58 dB in the range dc to 1.5 GHz
Weight: 23.75 lb.

Applications include: wireless device testing, EMC pre-compliance testing, secure communications, satellite communications, medical equipment shielding, operator safety, etc.

This high-attenuation enclosure, created by EMI experts TekBox, is available now from the authorized North American distributor Saelig Co., Inc. Fairport, N.Y. For detailed specifications, free technical assistance, or additional information, please contact Saelig at 888-7SAELIG, via email: info@saelig.com, or by visiting http://www.saelig.com/category/MFR00154.htm.