I looked at my existing cable and was able to look it up. It says it is sweep tested to 3GHz, is that the spec needed to connect the Hopper to the Node?
In the training info we've seen so far, it just says RG6 without any specificity.
However a couple techs indicated it may be Dish policy to replace any cable between the Hopper and node that isn't marked or known to be 3ghz RG6 cable. Not confirmed in any documentation yet though and we think short runs of older RG6 cable will work fine as long as the cable is in good condition.