Attempting to save analog tuner settings throws a null reference exception. This is because fields which are not relevant for analog tuners are enabled and read. This also applies (to a lesser degree) to DVB-IP tuners.

h4. Steps to Reproduce
0. Connect one or more analog tuners.
1. Open TV Server configuration.
2. Go to the tuner list.
3. Select an analog tuner.
4. Click "edit".
5. Optionally, make changes.
6. Click "save".
7. (Dialog doesn't close and exception appears in the error log.)