EMC Test Site Validation Services 

As Testups, we are collaborating with accredited and third party calibration laboratories to offer on-site EMC test site validation services. Send us your test site’s details (dimensions), location, required site validation methods and  get your quote. During quoting process, earliest available service dates are also mentioned. The sooner you order, the sooner we can schedule test site validation service.

EMC Test Site Validation Services we offer are explained below:

SE is measured in accordance with EN 50147-1. Typical measurement frequencies are:

A validation according to IEEE Std. 299 is possible and when the test is performed at certain test points the price calculation changes. Selection of these frequencies is possible, any other frequencies upon request. The exact location of the test points will be defined together with the customer on site as it is necessary to have full access to all test points. A leakage test at 433 MHz will be performed when requested at time of order. Please nominate an assistant to the on-site validation engineer for setting up the equipment and to handle ladders, tripods and the like. He needs to be familiar with the circumstances on the site, e.g. arranging stable electric power supply or arranging electric light at dark conditions and shall be able to fix any possible leakages by cleaning or adjusting the shielding enclosure. If the SE results do not fulfil the acceptability criteria or customer’s specification, and a modification of the shielding is necessary, waiting time and re-measurements are charged additionally. Order codes related shielding effectiveness measurements are listed below: 

NSA measurements have different methods and frequency ranges:

* Normalised Site Attenuation (Normalised Site Insertion Loss / Reference Site Method) (CISPR 16-1-4, 9kHz-30MHz)

The Normalised Site Insertion Loss (NSIL) is measured according to CISPR 16-1-4/AMD2 ED4. Frequency range from 9 kHz to 30 MHz; Magnetic field antennas (Loop) in all three orthogonal directions at one distance and at a height of 1.3 m; the volumetric test method is applied.

The use of our calibrated equipment is included in the price. Below table shows the test volumes and acceptability criterion of the two different chambers: 3 meter Semi Anechoic Chamber (SAC3) and 10 meter Semi Anechoic Chamber (SAC10)

* Normalised Site Attenuation (Reference Site Method) (CISPR 16-1-4 / ANSI C63.4, 30MHz-1 GHz)

Reference Site Method (RSM) and NSA respectively is measured in accordance with CISPR 16-1-4:2019+AMD1:2020+AMD2:2023 CSV (clause 6.6, 6.8) and ANSI C63.4a-2017 (NSA, Annex D) respectively. Frequency range from 30 MHz to 1 GHz; broadband antennas in horizontal polarisation at 1 m and 2 m height and in vertical polarisation at 1 m and 1.5 m height; volumetric test method is applied. The height scan of the receive antenna is carried out in the range of 1 to 4 m above ground plane.
The use of our calibrated equipment is included in the price; the automatic antenna mast with GPIB interface must be provided by the customer.

Below table shows the test volumes and acceptability criterion of the two different chambers: 3 meter Semi Anechoic Chamber (SAC3) and 10 meter Semi Anechoic Chamber (SAC10)

* Normalised Site Attenuation (NSA) Measurements (ETSI TR 102 273-3, 30MHz-12.75 GHz)

Site VSWR measurement is done in accordance with CISPR 16-1-4:2019+AMD1:2020+AMD2:2023 CSV (clause 7): frequency range from 1 GHz to 18 GHz, 50 MHz steps; broadband omnidirectional antennas in horizontal and vertical polarisation; volumetric test method is applied. The ground plane has to be covered
with absorbing material.
As the receive antenna type can have a large influence on the test result, the same antenna should be used for validation as the customer will use for emission testing. We recommend that the owner of the chamber provides his antenna for the test in agreement with the chamber manufacturer.
The use of our calibrated equipment is included in the price.

TL measurement is done in free space environment in the frequency range from 18 GHz to 40 GHz using horn antennas in horizontal and vertical polarisation at 1 m and 2 m height. The volumetric test method is applied (please specify test volume). At all test points the antennas are mounted at the same height, they face each other and are adjusted to the test distance of 3 m. The ground plane has to be covered with absorbing material.

The purpose of the FU measurement is to characterize the uniform field area (UFA) according to IEC 61000-4-3 Ed. 4.0: 16 points in a vertical plane of 1.5 m x 1.5 m, 1 % frequency step size, horizontal and vertical polarization of the transmit antenna. Up to 18 GHz the transmit antenna is fixed at one position to test the uniformity of the 16 points.

Please note that this test is done to validate the uniformity of the field and not to calibrate the setup for the radiated susceptibility testing according to IEC 61000-4-3 Ed. 4.0. The recording of the field strength, 40 cm above the earth reference plane, is only done at additional costs upon request.
The transmit antenna and power amplifier may influence the UFA performance. The standard allows a different starting height of the UFA. If the requested height is different to 80 cm, please specify, as we need to check our compatibility.

Below table shows the distance and acceptability criterion for the two different anechoic chambers (SAC3 and SAC10):

Absorber Lined Shielding Enclosure (ALSE) validation is done in accordance with CISPR 25 Ed. 4.0 on customer’s test bench. Modelled long wire antenna method (LWM, Annex J.3 (CISPR25 Ed. 4.0) and Annex I.2
(CISPR25 Ed. 5.0)): In the frequency range from 150 kHz to 1 GHz the field is generated with the “modelled long wire” and measured with an active monopole antenna, biconical and log-periodic antennas.
In the frequency range 1 – 6 GHz the field is generated by a small conical dipole and measured with a horn antenna in both polarisations. The TX antenna is placed at the EUT position of the test bench. This frequency range is not part of the draft to the standard.

The Reverberation Chamber validation (mode-tuning method applied) for one tuner is done according to IEC 61000-4-21 and ISO 11452-11. The position, size of the test volume and the applicable acceptability criterion shall be specified prior the validation.
The measurements of the field uniformity (FU) for the empty and loaded chamber are performed. The properties: antenna validation factor (AVF), chamber characterization factor (CCF), antenna characterization factor (ACF), chamber loading (MLF), Quality Factor (Q), Time Constant (Τ) and Insertion Loss (IL) are calculated accordingly.
The FU validation is conducted with a minimum tuner step as possible in order to meet the standard requirements: 12 tuner steps are applied. Increase of steps is done if the acceptability criterion is not met. The absorbing material, required for chamber loading, must be provided by the customer.
The TX antennas need to be installed inside the chamber by the manufacturer or the owner of the chamber.
Please provide a list of equipment (antennas, power amplifiers, signal generator, power meters) which can be provided by the customer for the testing. Typically, we are only providing a traceable calibrated field probe.
Prior the testing, we need to adapt our measurement software for the required measurement instruments and also for the controller of the stirrer.