Specifications

EMC-CS-2009.1

February 11, 2010

4.5.2 Tolerances.

Unless indicated otherwise, the tolerances specified in Table 4.1 are permissible.

Table 4-1: Permissible Tolerances

Time interval, length* ± 10 %

Resistance, capacitance, inductance, impedance ± 10 %

Test parameters for RF field strength, Electrical or magnetic field

strength, injected current, power, energy, transient voltage amplitude *

+10%

- 0%

* Higher tolerance ratings shall be considered during the design phase of the component or subsystem

Tolerances listed do not pertain to acceptance criteria for the DUT during testing.

4.5.3 Environmental Test Conditions

Unless indicated otherwise, the climatic test conditions are defined in Table 4-2.

Table 4-2: Environmental Test Conditions

Temperature

23 ± 5.0 degrees C

Humidity 20 to 80% relative humidity (RH)

4.5.4 Power Supply

The power supply voltage shall be between 13 (+ 0.5/-1.0) volts unless otherwise stated within this specification. For

regulated power sources (e.g. 5VDC) the supply voltage shall be maintained within ± 5 % of the nominal voltage level. A

number of tests methods require the use of an automotive battery. When used, the battery voltage shall not fall below 12

volts during testing. The battery may be charged during testing, but for test methods RE 310, CE 420 and CE 421, only a

linear power supply may be used for this purpose. If the power supply is located outside of the shielded enclosure, a

bulkhead RF filter may be used to prevent stray RF signals from entering or leaving the shielded enclosure.

5.0 Additional Requirements

5.1 Functional Importance Classification/ Performance Requirements

This specification requires that all component and subsystem functions are classified according to their criticality in the

overall operation of the vehicle (i.e. Functional Importance Classification). In many cases, common functions have been

previously classified (see ES-1W7T-F407K00-AA). If new functions are introduced, the FMC D&R group shall work with

the FMC EMC department to develop and agree to the appropriate classifications.

Once functional classifications are established, the associated performance requirements shall be developed and documented

in the component or subsystem’s engineering specification. These performance requirements serve as the basis for the

component/subsystem acceptance criteria used during EMC testing. The FMC D&R group and their supplier(s) shall be

responsible for developing these performance requirements.

5.2 EMC test plans

An EMC test plan shall be prepared and submitted to the FMC EMC department at least 20 days prior to commencement of

EMC testing. The purpose of this test plan is to develop and document well thought out procedures to verify that the

component is robust to the anticipated electromagnetic environment that it must operate within. The EMC test plan also

provides a mechanism for ongoing enhancements and improvement to the test setup, which better correlates with vehicle

level testing.