Sony VAIO PCG-R505ELK User Manual page 146

You cannot change FM radio stations during a recording session.
To use Quick Timer Recording
To quickly set the amount time remaining to record:
1.
Click on the FM Listening panel during the recording session, to automatically set the recording time to 10
minutes.
2. Continue clicking on the icon to extend the recording duration by 10 minute increments.
Page 146