While a specific datasheet for the RV3 is hard to find, the following are standard features for modern digital satellite finders, which your device will be comparable to.
Look up your target satellite's (compass heading), Elevation (up/down angle), and Polarization/Skew (tilt of the LNB) based on your current ZIP code or GPS coordinates. deutsche technologies rv3 digital satellite finder manual
Displays real-time signal strength (0–99%), voltage status, and a 22KHz tone indicator. While a specific datasheet for the RV3 is
Power on your indoor satellite receiver. The RV3 will automatically boot up and light its LCD screen as it siphons 13V or 18V DC power through the coaxial line. Elevation (up/down angle)
Do not connect the dish yet. Do this inside.