Site VSWR measurements

Site Voltage Standing-Wave Ratio (S_VSWR) measurements are used to validate a test site (Anechoic chamber or Open Area Test Site) for performing radiated emissions measurements above 1 GHz (below 1 GHz, NSA measurements are used for chamber validation).

The S_VSWR measurement is made in accordance with CISPR 16-1-4 and its purpose is to check for the influence of any reflections that might adversely affect emission measurements.

These measurements are used for validating new chamber installations and also for regular recalibration of existing facilities.

The S_VSWR measurement is a comparatively new measurement and some older chambers may require modification in order to meet the Svswr requirements.

New anechoic chamber validations

For verifying new anechoic chamber installations, using an independent measurement service provider gives you confidence that your new chamber is validated accurately, impartially and efficiently.

We accurately measure the S_VSWR performance of new chambers using our in-house developed software and measurement methods to give you accurate results, quickly and efficiently. Our depth of experience also ensures that we can help you to configure your chamber to achieve the optimum measurement results.

In addition to new chamber installations, we also provide S_VSWR measurements for chamber relocations, upgrades and modified chambers worldwide.

Regular S_VSWR validation of anechoic chambers

Some EMC laboratories choose to measure the S_VSWR of their chambers themselves, however this can actually be very consuming and requires specific equipment so it is often more efficient to use an independent company specializing in these measurements.

• Our in-house custom software and measurement procedures ensure that the S_VSWR measurements are completed quickly, resulting in minimum chamber downtime for you and less disruption to your laboratory testing schedule.
• Our engineers have been measuring S_VSWR in chambers for many years, even before it was a requirement in the standards. By taking advantage of our expertise, your laboratory personnel are freed-up for more productive work without any distractions of needing to understand infrequent, unfamiliar measurements.
• S_VSWR measurements require special antennas with specific radiation patterns as described in CISPR 16-1-4. We supply all of the required equipment so that you do not need to own and maintain any special equipment to undertake these measurements.
• Our depth of experience in chamber validation measurements enables us to help you configure your chamber to achieve the optimum measurement results.