Calculate PHA and GRADE values for the Photon Counting mode event file
sw00073232001xpcwnpouf.evt using the split threshold value stored in the
CALDB file, assign also grades according to the ASCA
convention (ASCAPHA and ASCAGRADE columns) and write the output in the
file 'outfile.fits'.
> xrtpcgrade infile=sw00106107000xpcw4po_uf.evt outfile=outfile.fits
hdfile=sw00106107000xhdtc.hk ascagrade=yes thrfile=CALDB