Give a try to TVTime, which may help you to find aerial broadcast signals and with a few options you will be able to make your tvtuner work perfectly with analog signals, the same as cable or digital (digitals not tested by me and may require special hardware).
You can install tvtime via synaptic or by dropping the next in a terminal.
sudo apt-get install tvtime
Here is a few screenshots of TVTime in action.
Here is the main TVTime television viewer, with the analog channel 9 playing and the menu shown (right clic for menu, left clic for OSD)

Let's hit the Input configuration option in order to set up the video source, click again and again in order to cycle between the different video sources.

Back in the main menu, et0s choose "Channel management" and you will have the next screen, on which you may find the "Scan channels for signal", this can take a while.

In the same section you can find the "Change frequency table", on which you can adjust where is the tuner going to gather frequencies table, this will allow you to define whether to use Cable or Broadcast systems.


Additionally, if you face sound issues or no-sound while playing the tv station, just try this in a terminal, change the 48000 value for whatever your broadcast can stand for, in certain cases 32000 is good enough but it depends on your tv tuner.
tvtime | arecord -D hw:1,0 -r 48000 -c 2 -f S16_LE | aplay -
Please inform how are you managing this issue.
Good luck!
P.S. You can face an issue when changing those values and TVTime may won't work anymore. To override the setup I suggest you to backup the contents of the .tvtime folder (hidden) which is placed inside of your home folder in order to revert whatever changes you made.
Edit:
I am using this TV tuners:
- PCI - Philips Semiconductors
SAA7131/SAA7133/SAA7135 Video
Broadcast Decoder (rev d0)
- USB - Hauppauge! WinTV-HVR 850
Hybrid DTV Stick
Best Answer
If you have more than a video source (which seems to be your case), you must specify which one is going to be used by
tvtime
in order to get the images.In order to know which are your video sources you can drop this in a terminal:
ls -l /dev/video*
and you must have an output like this:Then you must try with each different video source, tvtime usually starts from 0, so you try from
/dev/video1
with this command in a terminaltvtime --device=/dev/video1
If everything is ok then you'll see the TV signal in a window. If it drops an error please edit your question with the output of your terminal in order to edit this answer with an advice/solution.
Check this out: https://askubuntu.com/a/45391/9598 and don't forget to use the proper
--device=/dev/video1
when needed.Good luck!