Some DCF77 Links
Some material on how to receive the DCF-77 signal.
Since I'm interested in the carrier frequency and not in the transmitted time information, ready-to-use modules aren't an option for me.
First of all, one might ask why the carrier frequency is so interesting. The answer is that the 77500 Hz carrier frequency is generated using an atomic clock. That's awesome for your lab, as you can readily obtain the 10 MHz standard frequency from it using PLL techniques.
So here some links (most of them in German)