I'm looking at the back side of a 3500.
The outputs you might use, in order of increasing quality, are:
- coax
- composite RCA plug
- S-VHS mini-DIN connector
- three RCA jacks with Component output ( Y, Pb, Pr )
Any of these would be an analog recording.
You might also want to get some advice on actual FTA tuner cards, or USB boxes.
These would give you a digital copy of the source broadcast.
And if its quality was really good, so would be your recording.
I used to make DVDs by taking the digital recordings off my FTA pvr, editing, and authoring.
Start with the best you can get, and the results will show it.