RF Link - 4800bps - 315MHz

Hello,

I bought two RF Link from SparkFun, and I can’t make it work!!!

1st:

I try with outh antenna and anything on the ANT pin

2d:

I try with a 23 cm (is what the pdf says) copper cable… no luck!

3d:

I try with a 23 cm copper cable with a capacitor to ground (I try pico and nanos…)… no luck!

4d:

I try with a 23 cm copper cable twisted like a inductance with a capacitor to ground (I try pico and nanos…)… no luck!

I don’t see any signal on data pin on the data receiver… I see data at 4800 at data pin of the sender…

What I’m doing wrong???

Thanks