This object represents the minimum time between the start of adjacent MPDUs within an A-MPDU. This time is measured at the PHY service access-point; the number of bytes between the start of two consecutive MPDUs in A-MPDU shall be equal or greater than (MPDU-density*PHY-bit-rate)/8. The encoding of the minimum time to this object is as follows. 'noTimeRestriction' - no time restriction between the start of adjacent MPDUs. 'oneEighth' - 1/8 microseconds 'oneFourth' - 1/4 microseconds 'half' - 1/2 microseconds 'one' - 1 microsecond 'two' - 2 microseconds 'four' - 4 microseconds 'eight' - 8 microseconds.