Final answer:
During the analysis of the heart rhythm.
Step-by-step explanation:
When using an automated external defibrillator (AED), it is important that the operator does not have contact with the patient during analysis of the heart rhythm. This is because the AED needs to accurately analyze the patient's heart rhythm without any interference. The operator should ensure they are not touching the patient or any conductive materials during this phase to prevent inaccurate results and potential harm to themselves.