measurement opportunity switch channels compensate for jitter etc while in the search_table state 504 the wlan module 208 compares the time remaining before each neighboring ap transmits its next measurement opportunity and selects the smallest positive value optimal choice for best power efficiency further the wlan module 208 selects the optimal power transition profile to be used while waiting from the next measurement opportunity the power transition profile is a combined warm down sleep mode and warm up sequence needed to minimize power consumption fig6 describes three power transition profiles representative of a typical wlan module 208 a power transition profile is defined as the minimum time needed to transition from full active receive to a desired sleep mode then back to full active receive in order to select a given power transition profile for a given measurement the time difference between the current timer and the next desired measurement must be longer than the power transition profile as shown in fig7 when the next measurement opportunity is farther out in time than the chosen power transition profile the wlan module 208 will remain in the desired sleep mode for the extra time after identifying the most appropriate neighboring ap to scan and selecting the optimal power transition profile the wlan module 208 executes the warm down sequence of the power transition profile if applicable and waits in the power transition profile 39 s sleep mode if applicable until time to warm up the receiver in order to be ready for the next measurement opportunity to initiate the warm up sequence the wlan module 208 transitions to the execute_scan state 506 in the execute_scan state 506 the wlan module 208 warms up.