Compliance to specific EMC requirements has become mandatory in many countries throughout the world.  Compliance is checked through emissions and immunity testing.

Radiated Emission Measurements

Thomson Lab Services (TLS) is accredited to perform radiated and conducted emissions testing per FCC Part 15.

The TLS GTEM test facility is an excellent pre-compliance tool for finding and measuring radiated emissions.  Measurement range is 30 MHz to 5 GHz. The cell is, in theory, a giant coaxial cable with the device under test enclosed inside the cell. The "center conductor," called the septum, conducts any radiated emission to the measuring equipment outside the cell. The output is free from normal ambient interfering signals thus, rendering a clean "picture" of what is being emitted from the device under test. The output is quick (30 minutes), accurate and repeatable. The cell is a great tool for development work! The GTEM can also be used to test Immunity to Radiated RF fields.

In-house Gigahertz Transverse Electromagnetic cell (GTEM)

Full compliance testing is preformed at the TLS 3 meter Open Area Test Site (OATS). The site is used to measure radiated emissions from electronic devices per the requirements in Title 47 of the Code of Federal Regulations (Part 15). Various antennae are used to measure intentional and unintentional radiators from 30 MHz to 6 GHz. Standard Gain Horns (1.7 GHz to 8 GHz), dipole and Biconilog broadband antennae are used to cover the test measurement range. The facility includes a ground plane with computer controlled turn-table, adjustable antenna mast (1 - 4 meters), HP-8546A EMI receiver and HP-85460A front-end filter. The site is listed with the Federal Communications Commission (FCC) and complies with the Alternate Site Attenuation requirements given in ANSI/IEEE C63.4.

Inside the 3m Open Area Test Site

Conducted Emission Measurements

The TLS Line Conducted Emissions facility is used to measure conducted RF emissions on the AC line cord. This is required under Title 47 of the Code of Federal Regulations (Part 15).  The RF screen cage has two LISNs (Line Impedance Stabilization Networks) and uses an HP-8542A EMI Receiver and an HP85460A front-end RF filter. Measurement range is 150 KHz to 30 MHz. The test facility adheres to the ANSI-C63.4 test methods.

Line Conducted Emissions Facility

FCC Declaration of Conformity

A "Declaration of Conformity," (DoC) is a type of FCC authorization based on testing performed by an accredited test laboratory. Thomson Lab Services has been accredited by The American Association of Laboratory Accreditation (A2LA) and can meet your DoC testing needs.

Immunity Measurements

Thomson Lab Services (TLS) is equipped to perform selected Immunity testing per the IEC/EN 61000 requirements.

IEC/EU Immunity Standards

Standard	Description
IEC/EN 61000-4-2	Electrostatic Discharge
IEC/EN 61000-4-4	Immunity to Electrical Fast Transients/Burst
IEC/EN 61000-4-5	Surge Transients
IEC/EN 61000-4-8	Power Frequency Magnetic Field
IEC/EN 61000-4-11	Voltage Dips, Short Interruptions and Voltage Variations

 
  
 Please contact TLS at 317-587-LABS (x5227) or e-mail us at TLS@thomson.net