There are several things you need to check. First, start with your home setup. On one of your receivers, press the dash button (bottom left on remote) and see if a window opens up saying "SWiM Connected". Also, look at the dish and see if it has one big "knob" or 3 "knobs" visible on the LNB assembly. One "knob" means you have a 3LNB dish, 3 "knobs" means you have a 5LNB.
Check the dish at your cabin as far as the single or triple LNB covers (3 or 5 LNB dish). If they are the same, it will make things easier, but you can still use it either way. More information on dish and LNB is located here:
http://hr20.dbstalk.com/docs/Dish,%2...able FAQ.pdf
The biggest issue will be whether or not the dish at the cabin is an SWM or regular dish. About the only certain way is to carefully remove the LNB assembly from the end of the mounting arm and look at the connector(s) on it. If there is only one connector where coax can be connected, it is an SWM LNB. If there are four connectors, it is not SWM. Before actually taking the LNB out, look and see how many coax wires are coming from the dish. If there is only one, you won't be able to tell for sure, but if there are 2 or more it will be a strong indicator the dish is non-SWM.
What you really want is to have the same type of LNB at both locations. If your home dish is a 5LNB SWM, then you want a 5LNB SWM at the cabin.
If the dish at the cabin is SWM, then you will need a power inserter in addition to a receiver, in order to use it. You can buy power inserters here:
http://www.solidsignal.com/pview.as...)&c=Multiswitch Power Supplies&sku=7440900270
Solid Signal also sells LNB assemblies, so if the one at the cabin is not the same as the one at your house, you can buy just the matching LNB and install it to the dish at the cabin. Just be careful to not move the dish itself when you are working on the LNB assembly.
Once you've got matching LNB assemblies, and a power inserter if you need one, hook up your receiver and see if it works. The dish is probably aligned properly.