NSA Chamber Testing: Compliant EMC Validation (30 MHz – 1 GHz)

Don’t settle for testing that adds complexity and risk to your schedule. Shielding Integrity Services (SIS) delivers expert, fully accredited, independent NSA Chamber Testing based on decades of practical, hands-on experience—not just theory. We use state-of-the-art automated systems that maximize testing efficiency, ensuring fast turnaround of accurate data and quick troubleshooting for any required performance adjustments. Whether validating a compact 3-meter setup or a specialized 10-meter facility anywhere in the world, SIS delivers the precise, compliant results you need to confidently move your projects forward.

Compliance Standards & Suitability

The Normalized Site Attenuation (NSA) test is the fundamental method for determining if a semi-anechoic chamber is suitable for use as a fully compliant radiated emissions test site.

Accreditation Standards

Our NSA measurements are rigorously performed in accordance with the specifications described in both:

• CISPR 16-1-4: The international standard for radio disturbance and immunity measuring apparatus and methods.
• ANSI C63.4: The American National Standard for Methods of Measurement of Radio-Noise Emissions.

Technical Specifications & Frequency Range

NSA validation focuses on the mid-frequency range where most radiated emissions testing occurs, confirming the chamber’s base performance.

Frequency & Antenna Polarization

• Frequency Range: 30 MHz to 1 GHz.
• Antenna Polarization: Validation uses broadband antennas in both horizontal and vertical polarizations at specified heights (1-meter, 2-meter, 1.5-meter).
• Test Distances: Typically performed at 3 meters or 10 meters}.

Normalized Site Attenuation

Volumetric Testing & Site Integrity

SIS utilizes the most advanced and accurate methods, ensuring every part of your test volume is compliant. The NSA volumetric method guarantees the chamber provides a reliable, controlled testing environment.

Test Methodology

• The volumetric method is employed over the turntable, with the typical test volume ranging from 1 meter to 4 meters (or larger).
• The scan height of the receive antenna is generally in the range of 1 meter to 4 meters above the ground plane.
• We provide fast turnaround of accurate data and test reports, backed by our proven, automated data capture software.

Deviation

SIS Chamber Lifecycle Support

We provide comprehensive support for your chamber’s entire lifespan, ensuring continuous compliance and optimal operation:

• Validation Scenarios: We conduct NSA tests on newly installed chambers, pre-existing chambers, and chambers that have been modified, upgraded, or relocated worldwide.
• Chamber Size: We handle chambers ranging from small, 3-meter compact chambers to high-performance, fully compliant 10-meter chambers.
• Reliability: Decades of on-site experience mean quick troubleshooting to resolve uniformity issues and ensure you meet required performance.