Normalized Site Insertion Loss (NSIL)

Bquest Labs Pvt. Ltd. provides ISO 17025 accredited professional Normalized Site Insertion Loss (NSIL) calibration and validation services for anechoic and EMC/EMI test chambers. NSIL measurements characterize the electromagnetic performance of a test site and help ensure accurate, reliable, and repeatable EMC/EMI test results.

Calibration Details

• Frequency Range: 9 kHz – 30 MHz
• Calibration Method: CISPR 16-1-4:2025
• Antenna: Seibersdorf PLA-SET (Precision Loop Antenna Set)
• Application: Anechoic Chambers and EMC/EMI Test Sites

NSIL Calibration Method

The measurement is performed by establishing a defined reference condition and subsequently measuring the same antenna configuration inside the chamber. The received levels are compared after applying applicable cable, antenna, and system corrections to determine the NSIL characteristics across the specified frequency range.

Measurement Process:
Reference Measurement → Chamber Measurement → Corrections → NSIL Calculation → Evaluation → Technical Report

Purpose of NSIL Calibration

NSIL calibration helps to:

• Verify the electromagnetic performance of the test site.
• Evaluate site attenuation and transmission characteristics.
• Identify frequency-dependent abnormalities and reflection effects.
• Ensure accurate and repeatable EMC/EMI measurements.
• Support chamber acceptance, periodic verification, and accreditation requirements.

We provide traceable NSIL measurements, technical evaluation, measurement uncertainty assessment, and detailed calibration/validation reports in accordance with the applicable standard and customer requirements.