How to design the Satellite over GPON system? GLB3500A-2T transmitter can drive 32pcs optical LNB directly. GLB3500A-2T20 transmitter can drive 256pcs optical LNB directly. If there are 257~4096pcs GPON subscribers, 1pcs GLB3500A-2T can be followed by 1pcs GWA3530 series EYDFA. If there are more than 4096 subscribers, 1pcs GLB3500A-2T20 is followed by 1x8 or 1x16 fiber splitter first, then each splitted fiber is followed by one high power GWA3530 EYDFA, where one EYDFA can drive up to 4096 optical LNBs.