Can the XDJ-1000 be used with link connections to a CDJ-2000 or CDJ-900?

Yes it can. However, some of the functions of the XDJ-1000 may be limited. To avoid this, the firmware of the CDJ-2000NXS/900NXS/2000/900 must be updated.

For instructions on updating the firmware, see the Pioneer DJ web support page.