The transponder and the two SD channels scan in on my Pansat 3500SD so you should be able to get them. You might need to tweak your dish (manually enter in the transponder and use it to peak).
All four channels are on the same 91w transponder and the TP is transmitted 24/7. The video often is in black if no content is playing during a scheduled segment. Usually a full page graphic is displayed when no segment is booked.