Example of electromagnetic shielding effectiveness test
NSA-65-6 : RF Shielding Effectiveness testing
EMCTEST Technologies, Via Marecchiese 273, Rimini, ITALY
Phone: +39 0541 728562 | E-Mail: info@emctest.it


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NSA-65-6 - MEASURING THE EFFECTIVENESS OF ELECTROMAGNETIC SHIELDING ENCLOSURES
Shielding effectiveness (SE) test following the Standard NSA-65-6 now superseded by the NSA-94-106 describes general specifications radio-frequency (RF) shielded enclosures for communications equipment.

The NSA 94-106 (formerly NSA 65-6) is known as the parallel setup, where both transmitting and receiving antennas are in parallel planes, and parallel with the plane of the sample under test.
To perform the following test we need the equipment:
  • Continuous wave (CW) source, 1 KHz to 10 GHz.
  • Transmitting and receiving magnetic field antenna set covering 1 KHz to 1 MHz.
  • Transmitting and receiving electric field and plane wave antenna set covering 1 KHz to 10 GHz.
  • Receivers or spectrum analyzers covering 1 KHz to 10 GHz with adequate dynamic range to measure the attenuation.
The magnetic and electric field attenuation tests shall be performed with the antennas located directly opposite each other and separated by a distance of 61 centimeters (24 inches) plus the wall thickness.
Magnetic field attenuation shall be measured at 1 kHz, 10 kHz, 100 kHz, and 1 MHz.
Electric field attenuation shall be measured at 1 kHz, 10 kHz, 100 kHz, 1 MHz, and 10 MHz.
The plane wave attenuation test shall be performed with the transmitting antenna placed at least 6 meters away from the enclosure surface (where practical) and the receiving antenna set no closer than 5.1 centimeters (2 inches) from the wall.
Plane wave attenuation shall be measured at 100 MHz, 400 MHz, 1 GHz, and 10 GHz.
Attenuation tests shall be performed around the entire door frame, air ducts, filters and through any accessible joint or penetration.
In addition, the magnitude and location of the maximum signal level emanating from the enclosure shall be determined by testing at least four locations.
The selection of testing locations should include not only walls, but also the floor and ceiling.
Emctest Technologies is a laboratory that performs shielding effectiveness tests on site, directly to the customer, in Italy and in Europe, or at its headquarters in Rimini - Italy.

We perform shielding effectiveness tests for several sectors:

  • private
  • industrial
  • medical
  • nautical
  • aviation
  • military
  • scientifical
Typical shielding effectiveness measurement frequencies are: 10 kHz, 100 kHz, 1 MHz, 10 MHz, 30 MHz, 100 MHz, 500 MHz, 1 GHz, 10 GHz, 18 GHz, 26.5 GHz and 40 GHz.

Our lab test can perform shielding effectiveness measurements up to 50 GHz.


Read more about it going back to the home page. Or if you are looking for a lab in order to test your product contact us via email or by phone simply clicking here.


Measurements are made according to customer specifications or in accordance with the main standards as below:
shielding effectiveness test example with 2 antennas
GENERAL APPLICATION FIELDS
Textile
  • Fabrics used to protect premises against electromagnetic fields
  • Realization of card holders
  • Jackets pockets
  • Shirts
  • Bags
  • Suitcases to protect RFID cards

Construction
  • Shielding panels and sheets for the construction of shielded structures such as shelters, screened rooms, reserved rooms, medical rooms, etc.

Glasses
  • Glasses to be applied to screens for small equipment
  • Glasses for the construction of shielding windows for buildings or internal dividing walls.

Applicable solutions
  • Spray
  • Shielding paints

Other shielding solutions
  • Not mentioned above

Oversize Products
  • Oversize Products
  • Aircrafts
  • Ships
  • Freighters
  • Trucks
  • Cars
  • Military Shelter
  • Container
  • Electrical cabinets / Enclosures

Constructions
  • Entire buildings
  • Rooms
  • Reserved places
  • Government premises
  • Medical facilities
  • Shielded chambers
  • Anechoic chambers

Glasses
  • Shielded glasses
  • Equipment screens

Applicable solutions
  • Spray for industrial use
  • Military shielding paints

Other shielding solutions
  • Not mentioned above

shielding effectiveness graph
CONTACT US
For information regarding the shielding effectiveness test, or to get a quote, you can contact us by phone or write us an email.
  • Opening time: 9am to 6pm (UTC/GMT +01:00)
E-mail: info@emctest.it   |     Phone: +39 0541 728562
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