ADF5901 R7?

in the page 22 of the datasheet of the adf5901,Clock Divider
Bits[DB23:DB12] set a divider for the VCO frequency calibration.
Load the divider such that the time base is 10 μs.

my question is :i do not understand''load the divider such that the time base is 10us'',whether it means:when write R7,we should delay 10us or not?