The Winegard TravLer is the only automatic DTV currently available.
http://www.winegard.com/travler
The link Dave gave you is where those in the know - go to get a good SAT tripod.
If you already have a Transit Tripod, you are halfway there. TV4RV sells an ala-cart kit to use with your tripod.
The reason this tripod works so great is because it is stabile and easily allows you to get the tripod perfectly level.
http://www.tv4rv.com/sunshop/index.php?l=product_detail&p=7
Once you have a perfectly leveled tripod, the custom mast adapter makes it super easy to swing the dish as you search for satellites.
http://www.tv4rv.com/sunshop/index.php?l=product_detail&p=12
Many here don't use meters. Some use cheap meters and others use some high tech whiz bang electronic meter.
Depends on how patient you are, your ability to swing a compass (true north versus magnetic, along with the variation in your area, distance from trailer and accuracy of your antenna equipment.
For example, the elevation scale is either stamped incorrectly on my dish, or all the SAT location info providers are wrong.
I go with my scale being off, and since I know that, getting my baseline is easier.
I use an electronic meter and find it to be a very worthwhile investment for my use. We have one campsite every year that my dish is about 150' from the trailer, can't even see the trailer from the antenna location. S the meter really helps there.
We have since added a Trav'Ler to the the roof (Goshen, almost special price).
And that is really nice option now. I like it.
But, I can still set up my portable and aim the antenna before the automatic dish finally settles in and is locked.
Signal meters on the DTV screen versus an electronic meter such as the First Strike.
With the hand held First Strike I can set my antenna before I even turn on the TV. That is a significant advantage. As having the antenna aligned keeps the receiver from choking when you turn it on with no SAT input.
Once the DTV receiver gets through it's warmup and choking on lack of a signal, it can be a challenge at times to even get to the signal meter screen.
The signal meter screen then scrolls though 32 SAT transponders, rolling from beginning to end. That takes time.
With a hand held meter you can watch the signal in real time. Doing it that way, I usually have a full locked on signal by the time I get back to the trailer.
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Which dish do you have? Seems there are quite a few different ones and that is my main confusion.
There is only one parabolic dish antenna for DirecTV HD.
That is the bigger elliptically shaped dish.
It is the same dish whether it is portable, or on your roof of your house or on the RV automatic version.