[mythtv] Problems tuning ATSC w/ HDHR and 0.21? LaGv Partial Lock?

[Derek Atkins]

Hi again,

> SCANNING: 635000000 (us-bcast:41)
> LOCK: 8vsb (ss=82 snq=37 seq=100)
> PROGRAM: 3: 56.1 WLVI-DT (no data)
>
> So, why is channel 56_1 pointing to channel 7_1 when it tries to tune?

I tracked it down.  For some reason it was pointing at the wrong
mplexid.

mysql> select * from channel where channum=56.1;
+--------+---------+--------+----------+----------+----------------------------+------+----------+--------------+---------+-------------+----------+------------+--------+-------+----------+----------+---------+---------------+---------------+---------+-----------+-----------+----------+-----------------+-----------------+---------------------+-------------------+------------+
| chanid | channum | freqid | sourceid | callsign | name                       | icon | finetune | videofilters | xmltvid | recpriority | contrast | brightness | colour | hue   | tvformat | commfree | visible | outputfilters | useonairguide | mplexid | serviceid | atscsrcid | tmoffset | atsc_major_chan | atsc_minor_chan | last_record         | default_authority | commmethod |
+--------+---------+--------+----------+----------+----------------------------+------+----------+--------------+---------+-------------+----------+------------+--------+-------+----------+----------+---------+---------------+---------------+---------+-----------+-----------+----------+-----------------+-----------------+---------------------+-------------------+------------+
|   5561 | 56.1    | 42     |        5 | WLVI-DT  | WLVI Boston's CW Digital-1 |      |        0 |              | 32633   |           0 |    32768 |      32768 |  32768 | 32768 | ATSC     |        0 |       1 |               |             1 |     133 |         3 |      NULL |        0 |              56 |               1 | 0000-00-00 00:00:00 |                   |         -1 | 

But...

mysql> select * from dtv_multiplex where sourceid=5;
+---------+----------+-------------+-----------+-----------+-----------+------------+------+----------+------------+-----------+--------------+-------------------+----------------+---------+---------------+-----------+--------------+------------+----------------+---------------------+
| 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     |
+---------+----------+-------------+-----------+-----------+-----------+------------+------+----------+------------+-----------+--------------+-------------------+----------------+---------+---------------+-----------+--------------+------------+----------------+---------------------+
[snip]
|     133 |        5 |        NULL |      NULL | 641000000 | a         |          0 | auto | v        | 8vsb       | a         | auto         | a                 | auto           |       0 | 8vsb          | a         | auto         | atsc       |             33 | 2008-05-29 18:40:03 | 
|     132 |        5 |        NULL |      NULL | 635000000 | a         |          0 | auto | v        | 8vsb       | a         | auto         | a                 | auto           |       0 | 8vsb          | a         | auto         | atsc       |             33 | 2008-05-29 18:40:01 | 

As you can see based on the scan, it really wants mplexid 132 (and freqid
41).  Once I change the mplexid the station tunes.

Weird.  Looks like a bug in the scanner?

-derek

-- 
       Derek Atkins, SB '93 MIT EE, SM '95 MIT Media Laboratory
       Member, MIT Student Information Processing Board  (SIPB)
       URL: http://web.mit.edu/warlord/    PP-ASEL-IA     N1NWH
       warlord at MIT.EDU                        PGP key available