hifi engine

Abour DCC and how to record digital in analog tape

I try to record and analog tape in digital DCC format with a philips 900, but I am not able to do it. When I heard in analog mode a digital tape, I heard a low noise, I ask about if anybody knows if its necesary to adjust the bias cuurent of the mr heads to obtain a hight level during the record process.
?anybody can record a analog tape in digital mode ?


P.D. Sorry for my english, I´m spanish