The thing I have always hated most about installing a satellite dish is having to dig a trench for the cable. Digging is boring, plus it will probably be a couple years before the lawn looks right again. But you can overcome both those issues in many soil types with this tool (no, I do not get any commission on this thing, just saw it mentioned in another forum and thought it interesting):
This won’t work in all soil types, and it doesn’t dig deep enough for high voltage wiring (110/220 volts, which by code in most cases must be buried at least two feet below ground level in the U.S.A.) but for low voltage wiring and coaxial cable it would be great. Personally, I’d make the top of the trench a little wider and push in 1″ (or slightly larger if you have several cables) black irrigation tubing (the type you buy on 100 foot coils in the home improvement stores) and run the cables through that; it will offer some protection for your cables if you forget exactly where they are and have to dig in the area for some other reason, as long as you don’t mistake the irrigation tubing for a tree root and start trying to chop it with a shovel (not mentioning anyone that might have done that, but will just say that although the irrigation tubing was a bit worse for wear the cables inside were fine). 😉
The commenters on YouTube seem to want to point out that there are some types of difficult soil for which this isn’t suitable, but that would be pretty much a given with any tool; even a shovel won’t dig through solid rock. And if you are passing near trees you might still need to dig underneath aby large tree roots that are near the surface, so definitely still bring your trenching shovel and hatchet for those situations.
P.S.: If you do buy irrigation tubing for your cables, 1″ tubing is adequate for one or two coaxial cables, maybe even three, but for anything above that I’d suggest going slightly larger. It’s a real pain trying to pull cables through too-small tubing, and could even damage the cables. If you do find that the tubing is a little crowded and the cable is pulling hard, go to your nearest electrical supply store or the electrical department of a home improvement store and pick up a container of wire pulling lubricant, and use that liberally to reduce friction during the pull. Also, note that while irrigation tubing is fine for protecting low voltage wiring, it may not meet code in your area for use with high voltage electrical wiring (110/220 Volts); consult a licensed electrician if you are contemplating any such use. Disclaimer: I am not an electrician, so do not rely on any statements in this article as accurate regrading electrical codes; when in doubt, consult an electrician or the national and local codes in your area.