[truenorthdv]

The invacom has 4 outputs 2 for linear and 2 for circular
Look at the bottom where the coax goes in it is labeled with a L or C.
Make sure you have it on the L- 123W is a linear sat.
I do think you are on the correct bird. Retro jams is AC-3 audio. you wnt get it unless you have a converter.
Assure you are doing a blind scan.
make sure you have LNB to single