SAE J1113-1:2018 pdf free

SAE J1113-1:2018 pdf free.Electromagnetic Compatibility Measurement Procedures
Immunity testing is commonly done using either one of two different techniques, (a) substitution, and (b) closed-loop leveling.This paragraph explains the control parameters of each.
a. The Substitution Method – The substitution method uses FORWARD POWER as the reference parameter that sets the test level during the characterization and the immunity test. The specific test level (E-field, current, voltage, or power) is characterized at each frequency per 6.1.4, by adjusting the forward power to produce the desired test level. This number is recorded and used as the reference parameter for the immunity test. This is done in an empty chamber (absorber lined shielded enclosure, TEM cell, tri-plate, etc.) for immunity testing and with a characterization test fixture for bulk current injection. The DUT test is conducted by subjecting the DUT to the test levels at each frequency as determined in terms of forward power in the characterization phase.
b. The Closed-Loop Leveling Method一This method does not require a characterization prior to the test; however, a pre-characterized sensor must be used to monitor the control parameter throughout the duration of the test. The signal generator level is adjusted based upon input from the control parameter until the desired test level is obtained.
Verification of test item parameters shall be performed in accordance with individual test method’s requirements. The test level versus frequency data shall be established using a CW signal. The method and results for each characterization point shall also be documented.
CAUTION: Hazardous radio frequency voltages and fields may exist within the test area. Care should be taken to ensure that the requirements for limiting the exposure of humans to RF energy are met. IEEE C95.1 is the U.S. National Standard addressing exposure of humans to electromagnetic fields. [The National Council on Radiation Protection (NCRP) has a similar standard which is more stringent in the microwave region.]SAE J1113-1 pdf free download.