select * from dtv_multiplex;
+---------+----------+-------------+-----------+-----------+-----------+------------+------+----------+------------+-----------+--------------+-------------------+----------------+---------+---------------+-----------+--------------+------------+----------------+---------------------+
| mplexid | sourceid | transportid | networkid | frequency | inversion | symbolrate | fec  | polarity | modulation | bandwidth | lp_code_rate | transmission_mode | guard_interval | visible | constellation | hierarchy | hp_code_rate | sistandard | serviceversion | updatetimestamp     |
+---------+----------+-------------+-----------+-----------+-----------+------------+------+----------+------------+-----------+--------------+-------------------+----------------+---------+---------------+-----------+--------------+------------+----------------+---------------------+
|     252 |        1 |       24576 |      9018 | 658000000 | a         |       NULL | NULL | NULL     | NULL       | 8         | 3/4          | 2                 | 1/32           |       0 | qam_16        | n         | 3/4          | dvb        |              2 | 2006-05-03 15:26:10 |
|     251 |        1 |       20480 |      9018 | 634000000 | a         |       NULL | NULL | NULL     | NULL       | 8         | 3/4          | 2                 | 1/32           |       0 | qam_16        | n         | 3/4          | dvb        |              2 | 2006-05-03 15:25:51 |
|     250 |        1 |       16384 |      9018 | 713833330 | a         |       NULL | NULL | NULL     | NULL       | 8         | 3/4          | 2                 | 1/32           |       0 | qam_16        | n         | 3/4          | dvb        |              2 | 2006-05-03 15:26:06 |
|     249 |        1 |       12291 |      9018 | 722166670 | a         |       NULL | NULL | NULL     | NULL       | 8         | 1/2          | 2                 | 1/32           |       0 | qam_64        | n         | 2/3          | dvb        |             29 | 2006-05-03 15:25:56 |
|     248 |        1 |        8202 |      9018 | 578000000 | a         |       NULL | NULL | NULL     | NULL       | 8         | 1/2          | 2                 | 1/32           |       0 | qam_64        | n         | 2/3          | dvb        |             31 | 2006-05-03 15:26:17 |
|     247 |        1 |        4156 |      9018 | 849999990 | 0         |       NULL | NULL | NULL     | qpsk       | 8         | 1/2          | 2                 | 1/32           |       0 | qam_16        | n         | 3/4          | dvb        |              2 | 2006-05-03 15:26:17 |
+---------+----------+-------------+-----------+-----------+-----------+------------+------+----------+------------+-----------+--------------+-------------------+----------------+---------+---------------+-----------+--------------+------------+----------------+---------------------+
6 rows in set (0.00 sec)