Specifications

EMC-CS-2009.1
© Copyright Ford Motor Company – All Rights Reserved Page 41 of 121
February 11, 2010
11.6 Requirements: RF Immunity to hand portable transmitters: RI 115
The device shall operate as specified in Table 11-1 when exposed to RF electromagnetic fields as delineated in Table 11-4.
RI 115 is based on the potential risk of modules being exposed to hand portable transmitters (e.g. cell phones). Specific
applicability shall be agreed with the FMC EMC department prior to testing and documented in the test plan.
Table 11-4: RI 115 Requirements for hand portable transmitters
Test severity (Watts)
(1, 2)
Band
Frequency
Band (MHz)
Level 1 Level 2
Modulation type
8 360-480 4.5 9.0 PM, 18 Hz, 50%
9 800 -1000 7.0 14.0 PM, 217 Hz, 12.5%
10 1600-1950 1.5 3.0 PM, 217 Hz, 12.5%
11 1950-2200 0.75 1.5 PM, 217 Hz, 12.5%
12 2400 -2500 0.1 0.2 PM, 1600 Hz, 50%
13 2500-2700 0.25 0.5 PM, 217 Hz, 12.5%
1: Test severity levels are only valid for the antenna identified in this specification
2: NET power delivered to the input port of the antenna, which established while the antenna is 1m from any object
11.6.1 Test Verification and Test Setup
Verification of component performance shall be performed using the test setup shown in Figure 11.5. References to wiring
harness and LISN are not applicable in case of modules without wiring harness (e.g. remote entry key). All tests shall be
performed in an absorber lined shielded enclosure (ALSE), which conforms to ISO 11452-2.
 This test procedure makes use of a small broadband antenna positioned above the DUT and it's wiring harness to
simulate electromagnetic fields generated by hand portable transmitters operating in close proximity. The result of
near field immunity tests is strongly influenced by the antenna type used and for this reason only Schwarzbeck antenna
SBA9113 with elements 420NJ shall be used for this test.
 The separation between the test antenna and the DUT surfaces and harnesses shall be either 5 mm or 50 mm
depending on expected proximity to intentional storage locations and product type as detailed in table 11-5 below. The
test antenna is positioned in step sizes specified in table 11-5 to ensure all DUT surfaces are thoroughly exposed.
 The FMC EMC department shall be consulted with respect to antenna to DUT surface separation distance and
positioning steps. This information shall be documented in the component level EMC test plan. Only one test antenna
to DUT height shall be used for a given device.
Table 11-5: RI 115 Separation Distances and Antenna Positioning
DUT Surface or Harness description
Antenna
Distance from
DUT
Antenna
Positioning
Steps
DUT surfaces and first 300mm of their harnesses (measured from DUT
connector) which are likely to be packaged between 50 to 200 mm of
intentional
and/or unintentional locations where a hand portable
transmitter may be located.
50 mm 100 mm
Keys and similar devices which may come in direct contact with hand
portable transmitters and all other DUT surfaces and first 300mm of their
harnesses which are likely to be packaged less than 50 mm from
intentional
storage locations.
5 mm 30 mm