SHOW

            SELFCAL SHOW [Last [First]]

    Shows the correction computed by self calibration. By default,  the  differ-
    ence between the last two iterations is displayed: phase should be around 0,
    and amplitude around 1 if the solution is converged.

    If  Last  and  First  are present, it shows the difference between these two
    specified iteration. If Last only is present, it shows the total  correction
    between the original data and that iteration.

    The  displayed  ranges are controlled by SELF_ARANGE[2] (limits of Amplitude
    gain), SELF_PRANGE[2] (limits of Phase correction) and SELF_TRANGE[2]  (lim-
    its for time axis).