Wireless device precompliance testing comes to the lab

June 13, 2012 // By Jean-Pierre Joosting
Rohde & Schwarz has added three options to its compact DST200 RF diagnostic chamber: the DST-B160 automated 3D positioner, the DST-B210 cross-polarized test antenna and the DST-B270 communications antenna.

These options significantly speed up precompliance testing of wireless devices, allowing automated test sequences to be performed on the lab bench so that developers no longer require constant access to large RF test chambers.

In wireless device precompliance testing, the compact DST200 RF diagnostic chamber now automatically sets the equipment under test (EUT) to the required position. With its latest options the DST200 claims to be the only RF test chamber on the market that enables OTA performance and RSE testing of wireless devices such as smartphones right on the lab bench. Test results are comparable with those obtained with large RF test chambers and are used for product optimization during the design phase — providing an ideal preparation for final compliance testing

The DST200 RF diagnostic chamber together with the CMW500 wideband communication tester from now enables fast, reproducible over-the-air (OTA) testing in accordance with the Cellular Telecommunications Industry Association (CTIA) test specification. In conjunction with the company's ESU EMI test receiver from, the new options make it possible to carry out radiated spurious emission (RSE) measurements quickly and easily with the DST200. These test setups are ideal for wireless device design optimization. Developers can compare the results generated with the R&S DST200 with the results obtained with larger RF test chambers, since similar test sequences are used in these chambers. The results generated with the different types of chambers exhibit a high level of correlation, differing from each other by no more than a few decibels. Using this solution, network operators can now perform conclusive qualification measurements on smartphones, for example, without the need to access large RF test chambers.

The DST-B160 automated 3D positioner uses servomotors to position the EUT in any orientation required for OTA measurements, eliminating the need for time-consuming manual positioning. The AMS32 OTA performance measurement software supports all cellular standards, including LTE MIMO, as well as WLAN and Bluetooth, plus it enables assisted