Mr. Paul Marsh has taken a look at the 7 GHz spectrum used by the French Syracuse 3B military satellite and reports the following frequency plan:
tpx 7250-7290 MHz possible 'spare' transponder
tpx 7299-7341 MHz
tpx 7349-7391 MHz
tpx 7399-7441 MHz
tpx 7449-7491 MHz
tpx 7499-7541 MHz
tpx 7549-7591 MHz
tpx 7599-7641 MHz
tpx 7649-7691 MHz
7705.000 : DSSS or PSK TT&C (Identical to TT&C from Telecom 2x)
7722.500 : TT&C generated on board the satellite
This satellite (2006-033B/29273) was launched on 11 Aug 2006 from Kourou, French Guiana on an Ariane 5 rocket and is stationed at 5 degrees west.
You can find more of his notes on the UHF-Satcom.com website at http://www.uhf-satcom.com/xband#Syracuse3B. You can find info on the first satellite of this series, Syracuse 3A at http://www.uhf-satcom.com/xband#Syracuse3A.
Syracuse 3B joins the Syracuse 3A satellite positioned at 43 deg east, launched on October 13, 2005, to complete the Syracuse III system. Syracuse III is the first military satellite of its generation that combines broadband capacity, flexibility, easy reconfigurability and highly secure connections, along with a dedicated ground control segment. France's Syracuse system is up and running, providing permanent connections between military and political authorities at home and operating units deployed around the world. In addition, the Syracuse system is open to collaborative use, and allows both Germany and NATO to share the Syracuse 3A/B resources.
Thanks Paul for the freq profile and the great info on the 7 GHz satellites on UHF-Satcom.com. The Syracuse 3B 7 Ghz spectrum plot below is courtesy of Paul Marsh.
