def _channel_name(row, prefix="", suffix=""):
    """Formats a usable name for the repeater."""
    length = 16 - len(prefix)
    name = prefix + " ".join((row["CALL"], row["CITY"]))[:length]
    if suffix:
        length = 16 - len(suffix)
        name = ("{:%d.%d}" % (length, length)).format(name) + suffix
    return name