On June 10, 2012 at 23:56, gwilly said...
I'm curious do you guys use the non-SWM 4 output 5 LNB unit to aim the dish, then switch it out with the SWM LNB?
I use a Accutrac III+ unit that I got from solidsignal.com and have yet to figure out how to measure a SWM signal, so I just keep a 4 output 5 LNB head in my truck to use for aiming then switch it out with a SWM head.
I also just leave the side to side adjustment at the middle and don't fuss with the dithering measurement. So far I haven't had a problem. I'll have to check if there is a firmware upgrade for my meter.
DirecTV has a video on their installer training site that illustrates just how far off you will be if you don't do the dithering process. (And you will be off!) They use a laser assembly shooting at a large graph about 50 feet away and demonstrate both with and without the dithering process. Now multiply that variance by the distance between you and the satellite and you'll understand just how bad it is off. The dithering process is incredibly important, and will only become more so as time goes on. It doesn't really take a lot of extra time to do it correctly (about two minutes once you get the hang of it), so why wouldn't you?
Likewise, swapping out the LNB assembly isn't a good idea. The new assembly is now no longer as accurately aimed and adjusted as the previous one.
I know the Accutrac III+ is SWM compatible for both the SL3S and SL5S single wire LNBs but I've not used one. Time to dig the manual out and learn how to do it properly!