I presently have two DVR's (with two dish inputs each) but they don't
run HD, just standard definition. I need to have my house re-roofed and
my old non-HD oval dishes will be disconnected until the work is done.
My son has an HD dish system on site with one unused outlet. Can I
somehow use a splitter on that feed to run my two house receivers? What
kind of splitter do I need? Thanks for any help!

Ray