I use a G2 with 2 HD DVR Receivers. One is an HR24-100 the other is a HR21-700.
You do have to go to the receiver menu and change settings.
Below is my "Cheat sheet" for setup in the MH.
Reverse these settings when you get back home.
MH – Portable 18” Dish and SD Channels Only
1. Do not install B-Band Converters
2. Plug in all cords. Turn on receiver wait for setup to complete (about 6 minutes)
3. Menu-Settings & Help-Settings-Satellite-View Satellite Strength-Satellite 101, final check after aiming the dish
4. Menu-Settings & Help-Settings-Display-TV Ratio: Standard 4:3
5. Menu-Settings & Help-Settings-Display-TV Resolutions: Check 480i only
6. Menu-Settings & Help-Settings-Display–Video: On, Pillar Box, Dark Gray
7. Menu-Settings & Help-Settings-Display-Preferences-Guide HD Channels: Hide HD duplicates. Note: This takes a few minutes to change.
8. The MH Portable dish will not receive/record HD and will display ln not found for HD channels.
9. Menu-Settings & Help-Settings-Satellite-Repeat Satellite
Setup: Dish setup: Option 1 – 18” round dish 02: Multiswitch Dual. To confirm: Menu-Setup-System Setup-Info & Test-More System Info and confirm.