NOTE: Current settings: 
Channel 1: Real frequency is 11,8365 GHz, I entered 1183650 to be in the "right slot". Symbol Rate should be 27500, I entered 27500000.
Channel 2: Real freq is 11,9535 GHz, I entered 11953 which is what the "scan" utility gave out (actually I imported its channels.conf). I used 27500 as symbolic rate.
Please also note that I did not make MythTV scan for the channels itself; the status bar did not move beyond 3%. 
My System: P4 @ 2400 MHz, 768 MB RAM, Linux 2.6.15-rc7, Debian etch, TechniSat SkyStar 2 TV

mythtv@tv:~$ mythbackend
2006-02-28 00:59:01.304 Using runtime prefix = /usr/local
2006-02-28 00:59:01.318 New DB connection, total: 1
2006-02-28 00:59:01.320 Connected to database 'mythconverg' at host: localhost
2006-02-28 00:59:01.326 Current Schema Version: 1123
Starting up as the master server.
2006-02-28 00:59:01.336 New DB connection, total: 2
2006-02-28 00:59:01.337 Connected to database 'mythconverg' at host: localhost
2006-02-28 00:59:01.341 DVB#0 Using DVB card 0, with frontend 'Zarlink VP310 DVB-S'.
2006-02-28 00:59:01.980 New DB connection, total: 3
2006-02-28 00:59:01.980 Connected to database 'mythconverg' at host: localhost
2006-02-28 00:59:01.982 DVB#0 WARNING - Your frequency setting (8566350) is out of range. (min/max:950000/2150000)
2006-02-28 00:59:02.015 New DB scheduler connection
2006-02-28 00:59:02.016 Connected to database 'mythconverg' at host: localhost
2006-02-28 00:59:02.026 mythbackend version: 0.19.20060121-2 www.mythtv.org
2006-02-28 00:59:02.026 Enabled verbose msgs:  important general
2006-02-28 00:59:02.026 AutoExpire: Found 1 recorders w/max rate of 138 MiB/min
2006-02-28 00:59:02.028 AutoExpire: Required Free Space: 3.0 GB w/freq: 10 min
2006-02-28 00:59:04.022 Reschedule requested for id -1.
2006-02-28 00:59:04.034 Scheduled 0 items in 0.0 = 0.00 match + 0.01 place
2006-02-28 00:59:04.039 Seem to be woken up by USER
2006-02-28 00:59:11.342 Running HouseKeeping
2006-02-28 01:00:22.090 New DB connection, total: 4
2006-02-28 01:00:22.093 Connected to database 'mythconverg' at host: localhost
2006-02-28 01:00:22.095 AutoExpire: ERROR when trying to autoexpire files.  No recordings available to expire.
2006-02-28 01:00:31.155 ERROR retrieving program info when trying to delete program for chanid 1527 recorded at Di Feb 28 00:35:57 2006. Recording will NOT be deleted.
2006-02-28 01:01:00.693 EITScanner: Now looking for EIT data on channel 1
2006-02-28 01:04:11.353 Running HouseKeeping
2006-02-28 01:06:00.810 DVB#0 WARNING - Your frequency setting (9738047) is out of range. (min/max:950000/2150000)
2006-02-28 01:06:00.811 DVB#0 WARNING - Symbol Rate setting (27500) is out of range (min/max:703125/45000000)
2006-02-28 01:06:00.836 EITScanner: Now looking for EIT data on channel 2
2006-02-28 01:09:11.360 Running HouseKeeping
2006-02-28 01:11:00.953 DVB#0 WARNING - Your frequency setting (8566350) is out of range. (min/max:950000/2150000)
2006-02-28 01:11:00.979 EITScanner: Now looking for EIT data on channel 1

(It will go on like this: whenever the EITScanner switches to Chan 1, I will get the frequency warning, and once it swithes to Chan 2, I got both the freq and the Symbol Rate warning.)