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XTx-400 X-Band Transmitter


Summary

The XTx-400 X-Band Transmitter supports very high-speed payload data downlinks for Earth observation and scientific missions. The XTx400 is based around a Xilinx Virtex-5 FPGA (field programmable gate array) and is highly flexible, supporting a number of different data rates, modulation, and coding schemes. A maximum data rate of 500 Mbps can be supported with 8PSK modulation and 5/6 TCM encoding. Utilizing Surrey’s X-Band Antenna Pointing Mechanism, it is feasible to operate two transmitters simultaneously in opposite polarizations, delivering a total downlink data rate of 1 Gbps. The XTx400 evolved from Surrey’s heritage XTx105 X-Band Transmitter, which has flown on over ten missions including, most recently, NigeriaSat-2. The new transmitter is flying for the first time as a complete unit on Surrey’s TechDemoSat-1 mission, launched in 2014.


Specs

lifetime> 7 yr
length215 mm
width205 mm
height135 mm
voltagemin: 15 V, max: 50 V
power5 W
mass4 kg
radiation tolerance> 5 krad
mechanical vibration15 Grms
operating temperaturemin: -20 C, max: 50 C
frequencymin: 8025 MHz, max: 8400 MHz
data ratemin: 10 Mb/s, max: 500 Mb/s
full datasheet

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Last updated: 2018-07-13