Telstar 4's Ku-band

Main transponders 16 to 24 (variable)
Backup transponders 12
Power 60 W standard, up to 120 W (TWTA)
Bandwidth 54 MHz & 27 MHz
EIRP max 50 dBW

8 transponders can be splited in 16 transponders of 27 MHz. The 120 W transponders are achieved by using the backup transponders

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