HIGH-RATE SIGNAL PROCESSOR (DG5000)
OVERVIEW
 The RT Logic High-Rate Signal Processor (DG5000) provides a flexible digital platform for IF and baseband signal processing functions. The card, which is designed for use in Compact PCI (cPCI) or Ethernet-based systems, can take on unique personalities supporting a variety of application-specific receiver and modulator functions. The hardware features a highperformance Analog-To-Digital Converter (ADC) and Digitalto-Analog Converter (DAC), tightly coupled to a Xilinx Virtex-5 Field-Programmable Gate Array (FPGA) with local high-speed memory. Because the digital processing is implemented in firmware, the DG5000 is easily tailored to specific customer requirements. The DG5000 provides a versatile digital processing solution for satellite ground, spacecraft test, and range/flight test applications.



APPLICATION
 The DG5000 RF front-end bandpass filters the input signal (IF) and samples it at 213 Msps with a 12-bit ADC. The signal samples are processed by the onboard FPGA according to the firmware personality loaded into the device. A microSD (µSD) card contains the personality firmware and software. Under the control of a configuration file or via a command, the DG5000 can quickly assume new personalities. For high-speed local storage, the DG5000 has 512 MB of DDR2 SDRAM. A front-panel port is provided for trigger input or output signals. An optional Fiber interface can operate in Fiber-Ethernet mode or provide output data at rates up to 4.26 Gbps (213 Msps).

In addition to the digitizing function, RT Logic optionally provides firmware personalities for the DG5000 that support digital downconversion, signal emulation, pulse generation, channel simulation, filtering, decimation, PSK and PM carrier demodulation, subcarrier B/QPSK demodulation, and Viterbi decoding. The high quality of the analog front-end and ADC makes the DG5000 an ideal component in a Digital Spectrum Analysis system. The onboard, dual-output DAC and signal generation firmware provide signal outputs that include BPSK, DPSK, QPSK, OQPSK, SOQPSK-TG, SOQPSK-MIL, 8PSK, MSK, FSK, AM, FM, and CW.
FEATURES
IF Input
  • 40 MHz Instantaneous Bandwidth At 70 MHz IF
  • 85 MHz Instantaneous Bandwidth At 160 Or 266 MHz IF
  • 213 MHz Sample Rate
  • Gain Control
  • Filtering/Averaging/Shaping Firmware
IF Output
  • 40 MHz Bandwidth At 70 MHz IF
  • 85 MHz Bandwidth At 160 Or 266 MHz IF
  • Programmable Sample Rate
  • Dual-Channel (IF And Baseband)
  • Modulation Firmware
  • Digital Shaping Filters
IRIG Input
  • Input From Front Panel Or Backplane
Clock Reference
  • Input From Front Panel
  • 5 Or 10 MHz
Sample Clock
  • Locked To Reference, Input From Front Panel Or Backplane
  • Output To Backplane

 High-Speed Host Access
  • 32-Bit/66 MHz cPCI
  • Ethernet: 802.3i, 802.3j, 802.3u, 802.3z, 802.3ab
High-Speed Local Memory
  • 512 MB DDR2 SDRAM, 4 x 64 M x 16 Bit, 250 MHz
  • µSD Card Socket (Support For HC And HS) - (µSD Card Required For Standalone Ethernet)
Programmable Hardware
  • Xilinx Virtex-5 FX100T (500 MHz, ~5 Million Gates)
  • Xilinx Spartan-3, 200AN (150 MHz, ~200,000 Gates)
Optional
  • Dedicated Digital Downconverter
  • Signal Generation (Digital And Analog Modulation)
  • 85 MHz Channel Simulation
Hot-Swappable
DIGITAL IMPLEMEN-
TATION
The DG5000’s digital implementation eliminates the need for tuning, provides outstanding performance across data rates, and eliminates device variability. The 213 Msps ADC allows the DG5000 to support carrier PSK and PM demodulation, subcarrier demodulation, and digital sampling functions.

The DG5000 is configurable with one or more of RT Logic’s firmware application personalities to handle high-speed measurement filtering, decimation, and FFT processing. RT Logic can also customize firmware application personalities or develop new ones for specific customer requirements.

The DG5000 module is part of RT Logic’s family of Telemetrix® Dynamic Digital Processors. This set of modules supports the full spectrum of IF/baseband processing, signal modulation, and digital front-end functions, and offers the latest leading edge digital technology.
SPECS
Inputs/Outputs
  • IF Input/Output: 70/160/266 MHz
  • Input Power Level: -70 dBm To +5 dBm
  • Output Power Level: -70 dBm To -5 dBm
  • High-Speed Digital I/O
    • - Differential LVDS I/O (32)
    - Single-Ended TTL I/O (8)
    - High-Speed Differential (1 Gbps CML) Serial I/O (4)
  • cPCI 32-Bit/66 MHz Interface
  • Ethernet: 10/100/1000 Mbps Interface (RJ45)
  • Optional Fiber Ethernet: 10/100/1000 Mbps (SFF MSA)
  • Optional Fiber Interface: 4.26 Gbps (SFF MSA, 850 nm VCSEL)
  • 5 MHz Or 10 MHz Reference Input
  • Configurable Trigger: In 2.0 To 5.0 V, In IRIG, Or Out 3.3 V (24 mA)
Digitizer
  • ADC: 250 Msps/12-Bit Sampling
  • 213 Msps (Reference Lock)
  • 40 To 250 Msps (Direct Clocking)
DAC
  • 500 Msps/16-Bit Interpolating/Dual
  • 53.2/106.5/213/426 Msps (Reference Lock)
  • 40 Msps To 500 Msps (Direct Clocking)
 Reference Clock
  • 5 MHz Or 10 MHz
  • -9 dBm To +15 dBm Front Panel Input
Sample Clock
  • 213 MHz (Locked To Reference)
  • 40 MHz To 250 MHz (Front Panel Or Backplane Input)
  • -9 dBm To +15 dBm (Front Panel Input)
  • -12 dBm To +12 dBm (Backplane Input)
Physical
  • 4HP 3U cPCI Form Factor
  • 64-Bit cPCI Connector (P2 Used For GPIO)
  • Copper (RJ-45) or Fiber (SFF MSA) Interface
  • Front-Panel SMA For IF In, Clock Reference, Trigger, And IF Out
  • Dual-Color LED Indicator
Power (Typical)
  • 500 mA @ 5 V
  • 900 mA @ 3.3 V
  • 50 mA @ -12 V
Operating Environment
  • 0 ºC To 50 ºC
  • 10% To 90% Relative Humidity