Specifications

EMC-CS-2009.1

February 11, 2010

7.2 Test Verification and Test Setup

The requirements of CISPR 25 Edition 3, ALSE method, shall be used for verification of the DUT performance except where

noted in this specification. Component operation during testing shall be documented in an EMC test plan prepared by the

component/subsystem supplier and EMC test laboratory (see section 5.2).

• Co-location of multiple receiving antennas in the same test chamber to support automated testing for reduced test

times is not permitted.

• When performing testing using either the biconical or log antenna, the coaxial cable shall be routed directly behind the

antenna as illustrated in Figure 7-1. The cable shall remain parallel to the test chamber floor for a minimum of 1000

mm behind the rear most element of the antenna (see Figure 7-1). The cable shall include ferrite beads (Fair-Rite

Type 43 or equivalent) with a maximum spacing of 150 mm. Ferrite beads are not required for sections of the antenna

cable lying on the test chamber floor. The purpose for this modification is to minimize cable affects on the antenna's

published antenna correction factors.

• If a pre-amplifier is used to meet the ambient requirements (see section 7.3) , the device should be located where the

antenna cable meets the test chamber floor (see Figure 7-1). Location of the pre-amplifier at the antenna connector is

not recommended due to possible interactions between the antenna elements and the power supply wiring to the

preamplifier. The preamplifier may be located outside of the test chamber as long as the measurement system ambient

requirements are met. See section 7.2.2 for additional requirements when using preamplifiers.

• When tests are performed above 1000 MHz, the receiving antenna shall be relocated such that its center is aligned with

the center of the DUT as illustrated in Figure 15 of CISPR 25. Height of the antenna relative to the ground plane

bench shall remain unchanged.

• The DUT and any electronic hardware in the Load Simulator shall be powered from an automotive battery (see

paragraph 4.5.4 for requirements). The battery negative terminal shall be connected to the ground plane bench. The

battery may be located on, or under the test bench. The standard test setup shown in Annex G shall be used for the

Load Simulator, battery and Artificial Networks.

• The total harness length shall be 1700 mm (+300 /-0 mm). The harness shall lie on an insulated support 50 mm above

the ground plane.

• The DUT shall be placed on an insulated support 50 mm above the ground plane. However, if the outer case of the

DUT is metal and, when installed in the vehicle is electrically connected to the vehicle's sheet metal, the DUT shall be

mounted and electrically connected to the ground plane during the test in a manner representative of the vehicle

application. This configuration is only permitted if documented in the product engineering specification and is

representative of the vehicle application. The DUT grounding configuration shall be documented in the EMC test

plan and test report.

• For some DUT's, deviations from the standard test setup may be necessary to facilitate testing. These deviations must

be reviewed and approved by the FMC EMC department prior to commencement of testing. Test setup deviations

shall be documented in the EMC test plan and test report.

7.2.1 Test Setup for Engine Control Circuits (Bands EU1, G1 only)

When testing engine control electronics that are packaged in the engine compartment, the test setup illustrated in Figure 7-2

may be used. This test setup shall not be used for any other module or subsystem.

The ignition and injector wires shall be removed from the main wire harness and located directly on the ground plane 100

mm behind the main wire harness. RF shielding, as illustrated in Figure 7-2 shall be placed over the selected wiring. The RF

shielding shall be electrically connected to the ground plane via direct connection (e.g. screws) or copper tape with

conductive adhesive. Use of this test setup shall be documented in the EMC test plan and approved by the FMC EMC

department prior to commencement of testing. Photos of the test setup shall be included in the test report.