  In this paper, it is shown an enhancement of a previous model on the
measurement standard uncertainty (MU) of the insertion loss (IL) in a
reverberation chamber (RC) including frequency stirring (FS). Differently from
the previous model, the enhanced does not require specific conditions on the
parameter to be measured. Such an enhancement is applicable for all usable
measurement conditions in RCs. Moreover, a useful majorant is also shown; it is
obtained under a weak condition on the coefficient of variation (CV) of the
parameter to be measured. Results by measurements support the validity of the
proposed enhancement and of the majorant.
