to the group
ok you have a 10 ft mesh dish thats setup for c & ku ( you set it up 2 years ago and only get c band side)
well your in the correct group and these guys will get you going.
first c-band signals are a bit easier to receive. ku is a bit harder to hit.
your pole must be set in ground and level and plumb ( this is critical in hitting the ku arc)
pictures are great visual tool so if you can post some that will be great ( without feedhorn cover). I can only guess that you probably have a corotor.
strings across several points of the dish will show if the dish is put together correctly ( correct shape ) and will allow you to get the distances from the center of the dish to the feedhorn ( to gather correct focal distance). the strings should touch in the center. if they don't then some slight dish petal alignment might be needed.
ok heres where some of the other guys that know corotors and 4dtv tuning will jump in. c band & ku are in the same arc but need to be tuned properly.
post a couple of your c-band signal strengths. from several sats
as for a dvb receiver , you would love it , its a perfect addon for the big dish. it opens up a whole new world.