Dish Network and FSS
The Dish Network satellite TV service also relies on FSS technology in the Ku band to provide the necessary additional capacity to handle local channels required by FCC must-carry rules and make room for HDTV resolution. The old SuperDish system that Dish ceased manufacture of years ago, receives circularly-polarized DBS 12.7 GHz from both 110-degree (the Echostar 8 & 10 satellites) and 119-degree (the Echostar 7 satellite) orbital locations as well as linearly-polarized FSS 11.7 GHz from either the 121-degree (Echostar 9) or 105-degree (AMC 15) orbital locations depending on consumer choice. Those FSSs are no longer used for Dish Network home subscribers, and are now used exclusively for commercial or corporate services. Dish now uses the 118.7-degree (Anik-F3 -FSS) on their Dish 500+ and Dish 1000+ dishes. It has an oval LNB called a DP DBS/FSS Dual Band. This LNB will receive both the 119-degree and 118.7-degree satellites.
While the original Dish Network satellites use circular polarity at 12.7 GHz, the newer Intelsat 13/Echostar 9 satellite at 121-degrees uses the older FSS technology to broadcast commercial and corporate services. As a result, newer DiSH Network receivers are designed to receive both circular and linearly-polarized signals at two different intermediate frequencies from up to five different orbital locations.
The SuperDish had three low-noise block downconverters to accommodate the three satellites and two different technologies. SuperDish came in two configurations: SuperDiSH 121 was for international programming (but is now used exclusively for commercial and corporate services) and SuperDiSH 105 (also used today exclusively for commercial and corporate services) was used for high definition and for those customers in areas whose local channels are only available on the 105-degree satellite. As with other FSS technologies these signals are much lower power and as a result the SuperDISH is a very large and lopsided appendage. However, since the SuperDISH is under 1-meter in width it cannot be banned by homeowners' associations.
Read more about this topic: Fixed Service Satellite
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