if you look here

http://www.pioneerelectronics.com/pna/v ... sComponent

you see this

Recordability

Internal Storage (XM Only) Y

can you really record xm radio broadcasts on this tuner?

No

then what does that mean?

Probably a portion of the website they copied from a different product. Pioneer's web guys make mistakes often

If you hover your mouse pointer over that feature/opition, a popup box says "When 100% of memory is allocated to XM". This was copied directly from their Pioneer Inno site. The Pioneer Inno XM walkman has the option to store either 100% XM recordings, or 50% XM recordings and 50% MP3's/WMA's.

ok do i need to connect this unit to the D3 with the ipbus cable AND the XM data cable??

Yes

ok do i need to connect this unit to the D3 with the ipbus cable AND the XM data cable??