Summarize DM grid and other parameters.

def FDMT_params(f_min, f_max, maxDT, inttime):
    """
    Summarize DM grid and other parameters.
    """

    maxDM = inttime*maxDT/(4.1488e-3 * (1/f_min**2 - 1/f_max**2))
    logger.info('Freqs from {0}-{1}, MaxDT {2}, Int time {3} => maxDM {4}'.format(f_min, f_max, maxDT, inttime, maxDM))