UV_SPLIT /FREQUENCY

        [CLEAN\]UV_SPLIT [Degree [Compress]] /FILE FileIn [FileLine [FileCont]]
        /FREQUENCY F1 [... [Fn]] [/WIDTH Width]

    Specify  around  which  frequencies the line emission should be found.  Fre-
    quencies F1 to Fn must be in MHz. The full width of the window around  every
    frequency can be set by option /WIDTH.  The optional argument TYPE indicates
    the  type  of  width:  FREQUENCY (in MHz), VELOCITY (in km/s) or CHANNEL (no
    unit), the default being FREQUENCY.  The default width is the current  chan-
    nel width.

    Tip:  it  can  be  convenient to have a list of SIC variables containing the
    frequencies of the most intense spectral lines, e.g.
            HCO10 = 89188.52