When I was using a portable dish setup for DIRECTV I used one of those TONE units. IT mad a tone noise when it was pointing at the satellite... Just point it to the SOUTHEASTERN skies.

When you started getting a signal then you could keep turning down the sensitivity until you maxed out the signal.
I could never tell the difference between picking up the DIRECTV sugnal of the DISH signal until I hooked up the TV... If I got no TV reception with the signal maxed out then I knew I was on the wrong satellite.
I forget which way it but the satellites are inorbit of the Earth over the equator... One network is due south of SAN DIEGO CA and the other is due SOUTH from Houston TX... I think DIRECTV is south of Houston TX...
I used one of these portable dish platforms and could lock down the AZ SETTING so I only had to be on a level platform and just rotate the dish to find the DIRECTV SAT signal...

ALL PHOTOs here from GOOGLE Images
This portable dish was neat as I could wrap up my two 150-feet long RG cables around the base... I would set this on the hard plastic covered truck bed cover and then I would always have to stow the dish antenna when I left the area... Never got it stolen on me doing it this way...
I used the two RG cable from a dual head on the satellite dish so I could feed a SAT TV signals to two SAT RCVRS in the RV trailer with one at the living room TV and the other one in the bedroom... Did this for a couple of years until the NATIONAL BROADCAST came out with their digital high def TV station in 2009 I think it was... Found the local digital HDTV transmitting stations from the local towns gave me a much better TV signal than I got from from SAT TV. It was also free to the public... This is what I do today when not at a camp ground with CABLE TV from the pedestal.
Roy Ken