If you already have a system hooked up, or already have equipment to be hooked up, I believe others may be able to give you more specific info if you were to furnish the equipment name/type, such as name of your switch, diplexers, LNBF's, and home node.
I don't know if "Dish Network" brand switches will pass a TV signal or not. If they will, I don't think it would matter if you put it on the 119, 110, 119/110, or 61.5 feed. If you don't have your equipment yet, take a look at the JVI 35, and also some home nodes.
Otherwise, here are some links that may be helpful, and I think you may find the item "Jim5506" was talking about.
Diplexers, Home Nodes, etc:
http://www.sadoun.com/Sat/Order/Switches/Splitters.htm
Various Switches:
http://www.sadoun.com/Sat/Order/Switches/DishNetwork-switches.htm
JVI 35 (Sat & VHF/UHF) Switch:
http://www.sadoun.com/Sat/Products/JVI/35-DN34.htm
List of Documents:
http://www.solidsignal.tv/dishpro_installation.asp
On the last link, take a look at the "Distribution Examples."
I think there is more than one way to accomplish what you want to do, each requiring different (maybe additional) equipment. You may be using a legacy switch or two, but if not and you are using a DishPro 34 Switch, then you probably have a DP Adapter for the 4900 and the 1000 receiver. If so, I don't know if this will have an effect on your signals.
EDIT: Anyway, If the TV Ant Amp was really needed, I think it would probably work best between the antenna and the point it was mixed into the distribution system. However, if only one receiver needed an increased TV signal, then maybe an amp only along that cable run would do. Then, if you are backfeeding the Sat Receiver Output(s), such as from the 322, then you need to make sure you don't over power the OTA signals that they interfer with the backfeeding signals.