Thanks for your answer, very interesting. The customer started to install negative trap (5-40 MHz) on all custumer using cable modem, about 145 customer out of 400 sub. I just got back from this system and the noise has gone down since a complet alignment of the return system. This customer is not using a Video on demand but plan to do in the near future if I find one not to expensive to run. He also planning to do rebrodcast on the T-9 channel, which I tried and it worked quite well, except once in a while when INGRESS got bad, but only for a short instance about 1 or 2 seconde each time.
Joe 50
This is CABL.com posting #271764. Tiny Link: cabl.co/mbiRs