Can a dish 722 use wesern and eastern arc sattelites?

Yes, you can set up a permanent dish and switch between it and the Trav'ler. If you use a fixed 1000 series dish, your 722 will see it the same as it does the Trav'ler. If the fixed dish has an eastern arc LNBF, and the Trav'ler is using a western arc LNBF, you will need to run a "Check switch" on the receiver when switching dishes though, to update the satellite data.