What is the test for suppressing relevant evidence under the exclusionary rule?

When a defendant asserts relevant evidence should be suppressed under the exclusionary rule, the trial court, after resolving factual conflicts, undertakes a legal test which has two parts. In the first part of the test, the court assesses whether the actions of the officer in obtaining the evidence were objectively reasonable. The officer's state of mind is irrelevant to this inquiry. (Scott v. United States (1978) 436 U.S. 128, 135-136, 98 S.Ct. 1717, 1722-1723 [56 L.Ed.2d 168, 176-177].)