def __setKeySwitchGuardTime(self, iKeySwitchGuardTime):
        """ set the Key switch guard time

        Args:
            iKeySwitchGuardTime: key switch guard time

        Returns:
            True: successful to set key switch guard time
            False: fail to set key switch guard time
        """
        print '%s call setKeySwitchGuardTime' % self.port
        print iKeySwitchGuardTime
        try:
            cmd = 'keysequence guardtime %s' % str(iKeySwitchGuardTime)
            if self.__sendCommand(cmd)[0] == 'Done':
                time.sleep(1)
                return True
            else:
                return False
        except Exception, e:
            ModuleHelper.WriteIntoDebugLogger("setKeySwitchGuardTime() Error; " + str(e))
set the Key switch guard time

        Args:
            iKeySwitchGuardTime: key switch guard time

        Returns:
            True: successful to set key switch guard time
            False: fail to set key switch guard time