How do i uswe Itrip with roberts digital radio

[isitreallythattime]

Hi all, I reveived a Griffin Itrip for my birthday but am struggling to use it on my digital radio. The problem i am finding is that all the stations are pre-tuned and I don't know how to sync the radio and the itrip as i don't know what the frequencys are. Does anyone know how to get around this?

I'm not sure you can use them on digital radio's can you?

We have only ever used ours in the car on FM.