U know googling about something first is better before we start a discussion.
Jf17 have german communication equipment and they have no prb talking to f16s or Saab aew.
Prb now comes in data transfer linking, and for that purpose the saab and zdk03 are all linked to a GCS and what they are seeing is displayed on the ground and whole picture is made clear through which assets are controlled and commanded and data can be sent to any aircraft from the GCS whether its jf17 or f16.
Solution in shape of a PAF made link17 was in progress so that we have our own tech for data transfer among majority of the assets instead of relying on western tech.
http://quwa.org/2016/04/05/link-17-pakistans-homegrown-data-link-system/