def METHOD_NAME(self, bin_block: bytes, cmd_str: str) -> None:
    """
    write IEEE488.2 binblock
    Args:
        bin_block (bytearray): binary data to send
        cmd_str (str): command string to use
    """
    header = cmd_str + SCPI._build_header_string(len(bin_block))
    bin_msg = header.encode() + bin_block
    self._write_binary(bin_msg)
    self.write('')                  # add a Line Terminator