Michael has an HO Märklin Setup and has some questions about signals.

Is there information available which clearly explains :

[A] How signals function
[B] Where signals are best placed
[C] Wiring,connection and operation of signals
[D] The differences between signals ie. pre and main signals
[E] Books / Information which simply and clearly explain any of the above

If you know a lot about signals setup and would like to help Michael, then please click on the GREEN comments link below.