MGL Avionics Stratomaster Maxi Single ALT-3 Instructions Manual page 2

Absolute mode / Relative mode
Absolute mode: Altitude relative to sea level (MSL)
Relative mode: Altitude relative to some other altitude
Switching between absolute and relative modes is done using the "Enter" key when you see the
main screen.
As you switch from absolute to relative mode you can set the current altitude as the new
reference altitude. You do this by holding the "Enter" key down for two seconds as you switch
from absolute to relative mode.
Alternatively, you can set the reference altitude in the menu. This you would do if you need to set
a reference that is not obtainable through your current flight profile.
Setting up the ALT-2,3,4
Press the Menu key to enter the menu. You can move forward and backwards in the menu by
using the + and – keys. To change or select a menu item, move the highlight to the desired item
and then press the Select (Enter) key. To end an edit or function, press the Menu key again.
The Menu functions listed in the following section is based on the ALT-5. For ALT-3 and ALT-4
variants, ignore the serial protocol settings.
These images show the available menu
functions. Note that the "SP:" function is
available in the ALT-5 only.
Reference
altitude