You've already answered the DECA loading. The DECA node limit has nothing to do with the SWiM, which is to say they don't "take up" a tuner. CCK is the current name for the old broadband DECA to connect to the router/internet. Since these are H24s, you can check to see if the DECA network is active by running the coax test from the front panel. Press the guide & right arrow [both at the same time] until you see a menu with coax on the left. Select coax and it will poll the DECAs and displace those active and the loss to each from the 24 running the test. If you get a blank screen then the internal DECA isn't active and you may need to rerun the Sat setup to turn it on.