I did a quick search and couldn't find answers to my queries, but I would appreciate answers to the following. I'd say they are fairly  simple.

I had a new terrestrial aerial installed about 6 months ago. Unfortunately the receipt just says its a 303 VHF and it doesn't say what cable was used. I asked for good quality as the aerial was going to be used for VHF and DVB-T connections. See pics:



Anyway, the single cable currently comes to the lounge (a length of distance of approx 10 - 12meters). It is split at that point using a 3 way ANTSIG splitter. One goes to the tuner on my media PC, one to the RF on the TV, and one to another PC in another room.

I am doing renovations and getting under the house (only when I have to as there isn't a lot of room!), and would like to route cables to two other rooms.

That would mean a total of 5 connections. The cables coming off the splitter would vary in length from 3 meters to 8 meters.

QUESTIONS:
1 - Is this too many connections and do I risk loosing analogue or digital signals?
2 - Are the lengths OK or should splitting occur closer to the earial itself rather than further down the line?
3 - What is a diplexor out of interest and what does the 'power ' reference mean on a splitter?

I am computer savvy but NOT aerial savvy. All references to cable types, diplexors, multiplexors, frequencies, powered splitters etc are all lost on me I'm afraid. My splitter makes reference to power on it via two of the connections but what the hell this is, I don't know. There isn't any power going either way as far as I know - is that for amplifier applications or something?

Any help, much apreciated.