- Dish Networks Receiver User Guide

Page 97
DISH Pro Wiring Diagrams
DISH 500, DISH 300, One DISH Pro Twin LNBF, One DISH Pro
Dual LNBF, Two DISH Pro 21 Switches
When you set up your system following this diagram and run Check Switch
the Installation Summary screen should look similar to the one shown
below.
This diagram leaves out grounding to be clear. Make sure
you ground the system per the National Electrical Code
(NEC) and all local electrical codes.