I forgot to tell you, the best equipment I have seen to line-up the return system is from TRILITIC. A 9580-SST is located at the headend and a SSR that the SST talk to in the filed. The SSR introduces 8 return carriers between 5 to 42 MHz. The SSR has two function, one is looking at the sweep response at the headend from the NODE or the amp. you at and the other is looking at the ingress at the headend.
