Reference Sources are used to validate test setups. For EMC (ElectroMagnetic Compatibility) testing, references sources are signal sources for emission tests.

EMC labs calibrate their radiated emissions test sites, instrumentation and accessories annually or once two years. These calibration procedures are elaborate and time-consuming and may require other specialized test equipment. To improve the measurement accuracy and reliability, you have to check these items at closer intervals. It could be a daily procedure. Performing a full calibration each time might be costly. Reference sources will help you to check your test setups daily, just before starting the tests.

The problems with your measuring equipments may not be noticed during EMC testing and incorrect measurement data may result. A quick test using a Comb Generator can avoid this situation. Monitoring a few frequencies regularly on the Comb Generator’s broadband radiated output can verify the entire setup quickly and efficiently. Any potential problems with the test setup can be detected. In addition, Comb Generator data gathered over a period of time will provide information about the measurement consistency of the site. This will increase your overall confidence in the measurements made on the site. You can also use comb generators or noise sources as a reference source if you want to make Inter Laboratory Comparisons (ILC) which is required by IEC/EN 17025.

EMI Receiver used during Conducted and Radiated Emissions tests

How to choose reference source?

If you need a comb generator or noise source to validate your EMC test setups, you can choose your reference source by following these steps:

1. Choose the tests to be validated: Test setups can be either for conducted emission or radiated emission EMC tests. Type of emission testing defines the technical parameters of the reference sources.

2. Choose the test setups to be validated: Determine the items of your test setups that you want to validate. If you want to a use reference source for Conducted Emission test setups with LISN, you have to choose LISN-compatible reference source. On the other hand, if you want to use a reference source for Radiated Emission test setup, you have to choose it to be placed in the test chamber and to radiate with its antenna.

3. Choose measurement frequency range: Reference sources can be used for measurements in a broad range: 9kHz to 40kHz. Each reference source has a limited frequency range. If you define your start and stop frequencies, this will make easier to choose your reference source.

4. Optimize your requirements: After choosing test types, test setups and frequency range, optimize your requirements to choose a reference source that will fulfil your requirements. For instance, you can choose a reference source which can be used both for conducted emissions and radiated emissions. Or you can narrow the frequency range of reference source if you do not measure some frequencies.

Comb Generator Models

Do you need a reference source (comb generator or noise source) for your EMC test laboratory? We listed some of the models below. After choosing the model, contact us to get a quote.

    Photo &SizeFrequency& Step SizeDescription & ApplicationModelDatasheet

    Step size: 10kHz100kHz1MHz5MHz
    Enhanced Broadband noise and comb source kit with multiple antennas and  LISN adapter&Conducted and Radiated Reference Signal Source (for OATS, SAC, FAC, etc.) and LISN. YRS01KIT02 
    Step Size: 50 or 250 kHz 
    Conducted Reference Comb Generator&Reference Signal Source for LISN verificationCGC-255E 

    100 kHz – 115 MHzComb Generator for Conducted Reference Source&LISN verificationCGC-510E 

    Step sizes:
    Broadband noise and comb source kit with antenna&Conducted and Radiated Reference Signal Source (for OATS, SAC, FAC, etc.)YRS01KIT01 

    1 MHz – 1.5 GHz
    Step Size: 1MHz
    Comb Generator&Radiated Reference Signal Source (for OATS, SAC, FAC, etc.)CGO-501 

    5 MHz -1.5 GHz&Step Size: 5MHzComb Generator for Radiated Signal Reference Source&Radiated Reference Signal Source (for OATS, SAC, FAC, etc.)CGO-505 

    7.4×7.9×7.9 cm
    1 MHz – 1.5 GHz&Step Size: 1 and 5MHzComb Generator &Radiated Reference Signal Source (for OATS, SAC, FAC, etc.)CG-515 

    1 MHz – 1.5 GHz
    Step size: 1 or 5MHz
    Comb Generator Reference &Radiated Reference Signal Source (for OATS, SAC, FAC, etc.)CGO-515 

    20 MHz – 4.5 GHzComb Generator Reference Source&Radiated Reference Signal Source (for OATS, SAC, FAC, etc.)CGO-520 

    14.7×2.5 cm
    1 GHz to 18 GHz
    Step size: 100MHz
    Comb Generator Reference &EMI Radiated Site Reference SourceCGO-5100B 

    1 GHz to 40 GHz
    Step size: 1GHz
    Comb Generator with output to 40 GHz&Radiated Reference Signal Source (for OATS, SAC, FAC, etc.)CGO-51000 

    Step size: 10kHz100kHz1MHz5MHz
    Broadband noise and comb source kit with antenna&Conducted and Radiated Reference Signal Source (for OATS, SAC, FAC, etc.)YRS01KIT01 

    1) Pricing: Only valid for 2021. Incoterms: EXW. Shipment, Insurance and Customs fees are excluded.
    2) Delivery: 4-5 weeks
    3) Warranty: 3-years. (For YRS01KIT01 and YRS01KIT02: standard warranty period i s 1-year. Warranty can
    be extended to 2 years after completion of the registration form)

    Testups offers Reference Sources for EMC testing laboratories
    This video is prepared for EMC testing laboratories who are interested in validation of their test setups. As stated in ISO / EN 17025 standard comparisons and validation measurements are required for accuracy of measurements.

    For EMC testing, every test needs specific type of reference source depending on the test applied. For emission measurements, reference sources are generally noise sources and comb generators. They are generating signals and you can compare these results with typical or previous measurement data of the reference sources. In this video YRS02 and CGE01 Reference Sources are presented. YRS02 is a combination of noise source and comb generator.It is a broadband noise and comb source that is capable of producing a continuous noise output from 9 kHz to 1 GHz, or a comb of frequencies within the 5 kHz to 1 GHz range, with step size being selected by the user. The noise generator enables observation of details over the full spectral range, while the comb generator allows for the reference signal output and noise floor to be viewed simultaneously, and the frequency accuracy of measurement equipment to be checked. The

    Comb Generator Emitter 01 (CGE01) is a compact, battery powered, reference signal source that generates a broadband radiated and/or conducted output up to 18 GHz. When used as a verification reference source, the known output allows unknowns within systems or components to be measured or calculated. The compact size allows small enclosures to be evaluated when used as a reference source for shielding effectiveness measurements.

    Typical output of a Comb Generator (0-18GHz)