Specifications

EMC-CS-2009.1
© Copyright Ford Motor Company – All Rights Reserved Page 66 of 121
February 11, 2010
Figure 17-2: CI 230 Power Cycling Test Setup
Power
Supply
+
-
Thermal Chamber
Tes t
Fixture
Insulato r
Signal Source A
Signal Source B
Signal Source C
Signal Source D
A
DUT
B
C
D
Arbitrary
Wavef orm
Generator
DC Coupled
Audio
Amplif ier
Signal Source Detail
Ground Plane
17.3 Test Procedures
All waveforms shall be applied simultaneously to all power supply and control circuits in accordance with the timing
sequence shown in Figure 17-1. Verify waveforms prior to application to the DUT.
a)
Verify the waveforms prior to application to the DUT.
b)
Soak the DUT (unpowered) at the coldest operating temperature specified in component's engineering specification or
at -40 +0 / - 5 degrees C for one hour prior to testing unless otherwise stated in the EMC test plan. See section 17.2 for
details.
c) Apply the test sequence illustrated in Figure 17-1. Monitor DUT functions before, during and after the test.
While it is recommended to apply the test sequence with the DUT located in the thermal chamber (see Figure 17-2)
the test may be performed with the DUT located outside of the thermal chamber provided that the test sequence is
applied within ten (10) minutes of the DUT being removed from the thermal chamber following the hour long soak
period (step b). If this approach is taken, the soak temperature shall be lowered an additional 10 degrees C.
Deviations to this approach are only permissible if agreed to in writing by the FMC EMC department.
d) Soak the DUT at the same temperature from step b) for 30 minutes and repeat c). If the DUT was tested outside of the
thermal chamber, it shall be returned to that chamber within 10 minutes.