Specifications

EMC-CS-2009.1

February 11, 2010

4.0 Common Test Requirements

• Attention shall be directed to control of the RF boundary in both emission and immunity tests to reduce undesired

interaction between the DUT, the Load Simulator and the electromagnetic environment.

• The test equipment, test setups and test procedures shall be documented as part of the test laboratory’s procedures.

FMC reserves the right to inspect the lab procedures.

• Although testing generally involves only one physical component, subsystem testing involving multiple components

(e.g. distributed audio components) is permissible.

• All DV and PV testing requires an EMC test plan in accordance with the requirements of EMC-P-2009. See section

5.2 for additional details.

4.1 Load Simulator

DUT operation shall be facilitated by use of a Load Simulator that is constructed to simulate the vehicle system. The Load

Simulator, is a shielded enclosure that contains all external electrical interfaces (sensors, loads, etc.) normally seen by the

DUT. The Load Simulator also serves as an RF boundary for the DUT cable harness in addition to serving as an interface to

support and monitoring equipment required during testing. Detailed requirements for the Load Simulator are found in

Annex G.

4.2 Artificial Networks

Several tests in this specification require the use of Artificial Networks. Unless otherwise stated in this specification, the use

and connection of Artificial Networks shall be in accordance to the Setup shown in Annex G. Artificial Network design and

performance characteristics shall conform to CISPR 25, Edition 3 or ISO 7637-2 where applicable. For tests that do not

specify the use of Artificial networks, the power supply shall be connected directly to the ground plane, Load simulator and

DUT.

4.3 Interconnections

The electrical interconnections between the DUT and Load Simulator shall be facilitated using a standard test harness. The

length of this harness shall be 1700 mm +300/- 0 mm unless otherwise stated within this specification. The harness shall

contain wiring types (e.g. twisted wire pairs) that are used in the actual vehicle installation. Selected tests (e.g. CE420)

require shorter power/power return wiring between the DUT and measurement system. To avoid fabrication of multiple test

harnesses, it is recommended that a single test harness be fabricated to facilitate removal of these selected circuits and to

provide a method to reduce their physical length (e.g. in-line connector).

4.4 Bonding of DUT, Load Simulator and Artificial Network to Ground Plane

The Load Simulator and Artificial Networks shall be directly bonded to the ground plane used in the test setup. Bonding

shall be facilitated via screws directly into the ground plane. The bond impedance shall be verified to be less than 2.5 m.

The same requirements apply to DUTs with metal cases that are to be directly bonded to the ground plane (specified in the

EMC test plan). Use of conductive tapes for bonding is prohibited unless permitted by the FMC EMC department. Approval

requires specific process steps by laboratory to demonstrate bonding impedance remains stable over the duration of testing.

4.5 Test Conditions

4.5.1 Dimensions

All dimensions in this document are in millimeters unless otherwise specified.