This is my first radio that decodes RDS so I have a few questions about how it works.

1. Is it only FM? I've not found an AM stations with it.
2. Why does it sometimes stay on and sometimes flash?
3. I've heard that if your radio supports this, it monitors all frequencys for it all the time so that reguardless of the station your listening to, if a traffic report is played, the tuner would play that and then go back to your music. Is this the way it works?
4. If I tune to one particular FM station where the RDS lits up, I get a clock in the lower right hand corner. After I get the clock, it stays on reguardless of which station I change to. Even if I switch to AM. It's there until I turn the radio off and then I have to go to that one station again to get it back. Why is this?
5. When I have the clock, why does the top dot in the colon flash?


Thanks for your help.

Steve