Ive done this years back on E2 boxes with a single tuner, here are my notes from the time. The below would be using port1 AA port2 AB
Satellite--------You need this setup for each sat position but not 28e. obviously enter you coordinates.
LNB------------------------------LNB 1
Priority-------------------------Auto
LOF------------------------------Universal LNB
Voltage mode---------------------Polarization
Increased voltage----------------no
Tone mode------------------------Band
DiSEqC mode----------------------1.2
Toneburst------------------------None
Committed DiSEqC command---------AA
Fast DiSEqC----------------------no
Sequence repeat------------------no
Command order--------------------committed,toneburst
Uncommitted Diseqc Command-----None
Diseqc Repeats-------------------None
Longitude------------------------
---------------------------------West
Latitude-------------------------
---------------------------------North
Use Usals for this sat-------------Yes
Fixed dish
Configuration Mode Advanced
Satellite--------28 east
LNB------------------------------LNB 2
Priority-------------------------Auto
LOF------------------------------Universal LNB
Voltage mode---------------------Polarization
Increased voltage----------------no
Tone mode------------------------Band
DiSEqC mode----------------------1.0
Toneburst------------------------None
Committed DiSEqC command---------AB
Fast DiSEqC----------------------no
Sequence repeat------------------no
Command order--------------------committed,toneburst