Official comment
Hello John,
Unfortunately the support for Pro DJ Link and the original CDJ-2000 is very limited. I believe the Sp-16 will sync as a slave unit but you won't be able to select a Master on the CDJs. Below is a link that will give you more information regarding the PRO DJ Link feature on the SP-16.
http://faq.pioneerdj.com/product.php?c=4114&lang=en&p=TORAIZ_SP-16&t=faq