Robert, not being familiar with the two units, I'd have to see the back panels of each, or the interconnect instructions. However, my guess would be to use whatever compatible connections are available for output from the Echostar and input to the JVC. It depends on whether the JVC can act as a standalone recorder, which I imagine it should.
Hopefully, someone else will post better info than I.
Larry
www.fineelectricco.com