Solution for problem signal with module ds3000:

git clone git://linuxtv.org/media_build.git
cd media_build
./build

Running build until it starts to compile cc, about 30 seconds, and stop with CRTL+C

find $PWD -type f -name "ds3000.c"

Open file ds3000.c with a editor

Search line:

if (c->symbol_rate >= 30000000)

And replace with:

if (c->symbol_rate >= 29900000)

Save file.

make clean

make -j 4

make install

reboot

Hi Luca