Dvd recorder

Can anyone tell me how to set my dvd recorder to record a particular channel and then be able to watch a program on a different channel? I am only able to watch the program I am recording. As soon as I change the tv channel, the dvd records each channel change rather than continuing to record the initial program. Surely this is not right? It is a philips 3480/05 and I have it connected to my tv and sky box with scart leads, the aeriel is still connected between sky box and tv.

I will have to disappoint you. Since it is only a recorder,it will not work any other way.
You need some kind of cable box recorder which can do this.
You can ask your dish provider if they have something like this. I have one for a cable connection.