Skip to content

New OTA Reverb Chamber at 7Layers

Published on 27 March 2015

New OTA Reverb Chamber at 7Layers
ETS-Lindgren AMS-7200 OTA Reverb Test System for Wireless OTA Measurements constructed at 7Layers



Texas, 27 March 2015: 7Layers and ETS-Lindgren are proud to announce they have completed installation of an ETS-Lindgren Model AMS-7200 Over-the-Air (OTA) Reverb Test System at 7Layers’ laboratory in Sunnyvale, California. Reverberation chambers provide faster total radiated power (TRP) and total isotropic sensitivity (TIS) measurements of devices under test than industry standard anechoic chambers. This test chamber can be used for faster and more economical research and development testing services. In addition, testing in a reverberation chamber is well suited for wearable and large form factor devices because of the multipath signalling environment.

Wearable devices’ connectivity can be positively or negatively affected by the wearer. The AMS-7200 OTA Reverb Test System is able to create a multipath environment to show antenna performance by simulating the effects of radio waves being diffracted or deflected from a body phantom representing human muscle tissue. 7Layers expects testing with this chamber to be a popular solution for the wearable manufacturers during the product development cycle. In addition to body phantoms, live human tests can be conducted inside the reverberation chamber to provide testing for the effects of different grip styles, body types and movement on device connectivity.

The AMS-7200 OTA Reverb Test System can be used for certification testing of large form factor devices. Reverberation chambers, because of the inherent multipath environment, overcome the requirements of a large quiet zone for testing in anechoic chambers. Reverberation chambers don’t have quiet zone requirements and if a device can be placed in the chamber, it can be tested. New product categories such as wireless appliances, teller machines, and automotive devices sometimes require a larger quiet zone and necessitate either an oversized anechoic chamber or a reverberation chamber to test to the certification requirements.

With the installation of the new reverberation chamber, 7Layers can now offer swift and economical OTA testing services to manufacturers. This testing can be used while developing devices to achieve better performance and a superior user experience in the end product. With the expansion of wireless technology into new markets, new solutions for testing need to come along with it. ETS-Lindgren and 7Layers are pleased to provide this new type of testing service for emerging device markets.

About ETS-Lindgren
ETS-Lindgren is an international manufacturer of components and systems that measure, shield, and control electromagnetic and acoustic energy. The company’s products are used for electromagnetic compatibility (EMC), microwave, wireless and Magnetic Resonance Imaging (MRI) testing, electromagnetic field (EMF) measurement, radio frequency (RF) personal safety monitoring, and control of acoustic environments.
Headquartered in Cedar Park, Texas, ETS-Lindgren has manufacturing facilities in North America, Europe and Asia. The company is a wholly owned subsidiary of ESCO Technologies, a leading supplier of engineered products for growing industrial and commercial markets. ESCO is a New York Stock Exchange listed company (symbol ESE) with headquarters in St. Louis, Missouri. Additional information about ETS-Lindgren is available at Additional information about ESCO and its subsidiaries is available at
CONTACT: Janet O’Neil, Marketing Communications, ETS-Lindgren, +1-425-868-2558, janet.o’