The T70/70 performs demodulation, bit synchronization
, and frame synchronization of the spacecraft's state of health (SOH) telemetry and the TDRSS Return link.
The Telemetrix XL unit supports Telemetry downlink rates to 20Mbps and performs carrier and subcarrier demodulation for PM, FM, and B/QPSK signals, bit synchronization
, Viterbi and Reed Solomon decoding.
The Telemetrix(TM) 106R FM Processing Chassis performs signal acquisition, FM signal discrimination, bit synchronization
and data multiplexing.
Signal processing for the downlink includes S-Band radio frequency (RF) down-conversion, intermediate frequency (IF) demodulation at 70 MHz, subcarrier demodulation, and bit synchronization
On chip digital recovery and bit synchronization
further help reduce overall system cost by eliminating external analog tuning components and filters.
Another advantage of this synchronous approach is that, in addition to bit synchronization
, word and cell synchronization can be performed between the transceivers and the switch chip.
Altera([R]) Stratix III FPGAs enable the Quasonix Demodulator to provide true trellis demodulation and bit synchronization
for all three Advanced Range Telemetry (ARTM) waveforms -- PCM/FM, SOQPSK-TG, and Multi-h CPM.
RT Logic's T70/70 product provides IF/baseband downlink demodulation, bit synchronization
and downlink simulation with uplink command formatting, command modulation, and command echo processing.