Shown here are the window widening details. The ON time width is made up of several process related regions. First, the BLE peripheral/slave device base-band block wakes up from sleep, does house keeping tasks, and executes the BLE stack operation. This is followed by the radio receiver turning on to listen to pings from the master, followed by a transition to the radio transmitter, where a burst of requested data is sent over the radio link from the slave to master. The slave then does post processing and goes back to sleep. The window widening aspect, called out in the standard, refers to the radio receiver window called out as RX window width in the scope waveform. It is this Receiver window (RX window) widening that leads to extension of the ON time, due to the combined effect of the configured sleep time and the sleep clock inaccuracy.