I'm getting ready to switch TV away from Comcast and have the installer coming out later today. I want to get as much prep done in advance so he can get done quicker and had a couple of clarifications and questions I wanted to put out there. Background: - We're getting an HR34 and an H2x, obviously with HD and whole home dvr. - We had Directv several years ago. Dish was removed 2 years ago when we got roof redone, and I just removed the old cables and grounding block. Cables had connectors cut off and were exposed to rain, so I figured new cable would be better. - There are 2 RG6 going from side of house to the structured wiring cabinet inside. One of these will continue to be used for Comcast internet. - Old dish was mounted on back corner of roof (south facing, no LOS obstructions) about 40' from where coax enters house and I would assume new dish would go same place. - Electric meter/ground is right next to where coax enters house. Ground is currently going to existing Comcast grounding block. - Structured wiring cabinet is about 25' from where coax enters house and also contains my Comcast modem, wireless router, switch and new voip ATA. There is also power available. - All coax/ethernet are home runs to the wiring cabinet. - The two coax cables come into another grounding block that is grounded to electrical ground. Unfortunately the crappy builder just used crimp connectors rather than compression. - Since we'll only need two boxes for now, I just want to leave remaining coax runs unconnected. - Both locations where the boxes are going have both rg6 and cat5e. Here's how I would assume the installation would be, correct me if I'm wrong: - Dish with SWM lnb on roof with single cable (with ground wire) going back to grounding block where coax enters house. - Grounding block connected to electric meter ground. - In structured wiring cabinet the sat coax goes to a 4-way splitter. - Power inserter goes to power port on splitter. - The two locations that will have boxes are connected to splitter. - CCK device goes to remaining port on splitter and into router/switch.- In each of the rooms the HR34 and H2x are only connected to coax. I do have a couple of questions also: - How should grounding blocks be connected outside? - Can you just connect from Comcast grounding block to Directv grounding block? And if so, how should they be spliced? - Current ground connections outside look a bit oxidized - should a grease be applied?- Right now both coax's are tied into a grounding block in the structured wiring cabinet. - Is there a problem with them being grounded in two places (inside ground is also electric ground). - Is there a problem with Comcast and Directv sharing a grounding block in the structured wiring cabinet? Oh, and a single non-install related question. - Can you watch on-demand on the H2x, or is that only on the HR34? Appreciate the help - just trying to make it as smooth as possible for the installer.