TELEMETRIX XL IF/BASEBAND UNIT (T70/70XL)
OVERVIEW
 The Telemetrix® T70/70XL is RT Logic’s latest generation turnkey system for ground antennas and satellite test consoles. It integrates telemetry, command, and ranging functions (RF through baseband) in a compact 4U chassis. The T70/70XL employs Dynamic Digital Modules (DDMs) in its design to provide reconfigurable signal processing functions. The T70/70XL has been selected as the next generation Telemetry, Tracking, and Command (TT&C) solution for the Air Force Satellite Control Network (AFSCN).

APPLICATION
 Telemetry applications include the 70 MHz IF Receiver function (PM, PSK, FM, FM/FM Demodulators), subcarrier demodulation (BPSK/QPSK), bit synchronization, decoding (Viterbi/Reed-Solomon), CCSDS processing, and frame synchronization. An FSK Signal Discriminator is also available. PCM simulation, data archiving, and data replay can also be incorporated. The T70/70XL accepts command data inputs from network packets, and discrete ternary or dibit/binary interfaces. The T70/70XL generates the appropriate tone frequencies for the command bits and performs command modulation (SGLS, USB, Tone) to baseband or 70 MHz. Range signal generation (PRN, multitone) and processing of the returned ranging signal is supported for SGLS, STDN-USB, and multitone ranging schemes.

FEATURES
Reconfigurable And Customized Signal Processing

Telemetry Processing (100 bps To 20 Mbps)
  • 70 MHz IF Receiver (PM, FM, BPSK, QPSK, SQPSK, AQPSK, UAQPSK)
  • Subcarrier Demodulation (BPSK, QPSK, PCM/FM)
  • Spread Spectrum Demodulation (TDRSS, SQPN)
  • Bit Synchronization, Decoding (PCM Code Processing, Re-interleaving, Viterbi, and Reed-Solomon), Auto Bit Rate Detection, QPSK/SQPSK Ambiguity Resolution, Derandomization
Command And Echo Processing (100 bps to 2 Mbps) Via TCP/IP Or External CLK/DATA
  • SGLS Commanding (FSK/AM)
  • USB Commanding
  • LEO-T Commanding
  • Non-SGLS Commanding
  • 1 Symbol Command Delay Repeatability
Range Processing For SGLS (PRN), STDN/USB (Tone), Multitone Applications
  • Return Signal Processing
  • Range Determination
  • Doppler, Subcarrier Frequency, Power Level, Integrated Phase Measurements
  • UTDF Ranging MSG Format
TLM Test Signal Generation
  • Downlink 20 Mbps Carrier With Up To 2 TLM Subcarriers
Spectral Display

Up To 3 Simultaneous IF Receiver Channels (2 TLM, 1 Ranging And Command Echo)

Post Detect Diversity Combination

MODULAR, DIGITAL IMPLEMEN-
TATION
Firmware application personalities are downloadable to Field-Programmable Gate Array (FPGA)-based DDMs to support the full spectrum of IF/baseband processing, signal modulation, and digital front-end functions. Functional modularity of the Telemetrix architecture permits the T70/70XL to be easily tailored to customer specific requirements.
STANDARD T70/70XL CONFIGURA-
TIONS
  • T70/70XL-100: Full STDN/USB telemetry, command, and tone ranging functions, 70 MHz through baseband.
  • T70/70XL-300: Full STDN/USB/SGLS telemetry, command, and ranging functions, 70 MHz through baseband. Includes AFSCN CCS (ADCCP) interface capability.
  • Integrated Tracking Receiver Option.
SPECS
Telemetry Acquisition
  • IF Input Frequency: 66 MHz To 74 MHz
  • Input Power Level: (-90 dBm To 0 dBm)
  • Input Power Level: (-90 dBm To 0 dBm) Acquisition Time: 1000 Bits For Eb/No >= 6 dB; 100 Bits For Eb/No >= 15 dB
Carrier Demodulation
  • PM, PSK, To 20 Msps
  • Maximum Doppler 200 kHz, Rate 10 kHz/sec
Subcarrier Demodulation
  • Up To 2 B/QPSK Subcarriers
Bit/Frame Synchronization
  • Bit Rate: 100 bps To 20 Mbps
  • Viterbi And Reed Solomon Decoding
  • BER Performance: 0.5 dB From Theory Typical (<10 Mbps)
Outputs
  • Clock And Data
  • Test Points: Baseband, Digital
  • ADCCP Format
 Carrier Modulation:
  • Direct PSK Types, FM, PM
Subcarrier Modulation
  • Up To 2 B/QPSK Subcarriers
  • FM To 2 Mbps, FM/FM
Ranging
  • PRN Codes
  • Tones: Up To 8 Tones 10 kHz To 500 kHz
Power (Typical)
  • 5 A, 100-240 VAC, 50/60/440 Hz Single Phase
Operating Environment
  • 10 °C To 30 °C
  • 20% To 90% Relative Humidity Noncondensing
  • 4 RU Height