Multiswitch Terrestrial Input: Amp vs triplex?

[OldBen]

Ok, almost understand everything I need for simple multiswitch setup I want now, but final question relates to combining FM/DAB/TV aerials into multiswitch, I see two options:

Option A:
FM -> Triplexor
DAB -> Triplexor
UHF -> Amp -> Triplexor
Triplexor -> multiswitch

Option B:
FM -> Amp
DAB -> Amp
UHF -> Amp
Amp -> Multiswitch

Which is the usual way to do it

Won't be using a masthead amp, as apart from service issues, come switchover in 2012 possibly too much gain, although I need quite a bit of boost until then for UHF HD Mux. Plan to run all three aerial feeds into loftspace, then combine inside before running to multiswitch location also inside.

My understanding is most multiswitches don't have terrestrial amplification (but do have loss) as they are usually with launch amps and what not so I do need some amping before multiswitch, do I need to amp FM/DAB as well?

 

[satelliteman]

Amplification will depend on if it's an active switch or not. Some switches have FM/Dab and UHF inputs.

 

[OldBen]

The antiference have 3 inputs I notice, but most of the Vision or Triax ones seem to have single inputs and are not active, I did see EMP-Centauri do a switch with active terrestrial input.

If its active I just use a triplexor right?

But if its passive should I amp the lot, just UHF, or is it situation dependant?

 

[satelliteman]

Active will give a gain of about -2 to 1dB; more in some cases. Passive will give a noticeable loss.

If using a switch with a single terrestrial input, check it will pass 47-862Mhz.