Pdf: En 50147-1

I can’t directly provide a PDF of EN 50147-1 due to copyright restrictions, but here’s a practical guide to obtaining it and understanding its content.

EN 50147-1 is a European standard that outlines the requirements for the electromagnetic compatibility (EMC) of railway rolling stock. Here's a helpful essay:

The standard utilizes the "Insertion Loss" method. This involves measuring the signal strength between a transmitter and receiver with no barrier, and then measuring it again with the shield in place. en 50147-1 pdf

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Difference from EN 50147-2

Do not confuse EN 50147-1 with EN 50147-2, which deals with "Anechoic chambers – Part 2: Alternative test site suitability with respect to site attenuation." Part 1 focuses on the metal shield’s integrity, while Part 2 focuses on the internal absorber performance. I can’t directly provide a PDF of EN

Disclaimer: This article is for informational purposes. Always refer to the official EN 50147-1 PDF for definitive requirements. Standards are subject to update; verify the current version before use.

Operating Principle: A transmitter (TX) generates an RF signal outside the enclosure, while a receiver (RX) measures the signal level inside. The shielding attenuation is the ratio (in decibels) between the original signal strength and the reduced signal strength measured inside the enclosure. Background

• Ignoring dynamic range: The standard requires the measurement system’s noise floor to be 10 dB below the minimum expected attenuation.
• Incorrect antenna polarization: EN 50147-1 demands both vertical and horizontal polarization testing unless otherwise specified.
• Missing low-frequency testing: Some users stop at 1 MHz. The standard requires testing down to 10 kHz or the lowest frequency of interest.
• Neglecting ambient noise: High ambient signals can falsely increase measured attenuation. The standard requires verification of ambient levels before testing.

Background