def revoffset(loffset, acqu, proc):
    """
    computes the Bruker OFFSET (ppm of left most point) from spike axis offset value (Hz of rightmost point)
    """
    try:
        SW_h = float(acqu['$SW_h'])
        SFO1 = float(acqu['$SFO1'])
        OFF = (loffset + SW_h) / SFO1
    except:
        OFF = 0.0
    return OFF
