LOW-POWER PSK MODEM + VITERBI FEC + NETWORK


KEY FEATURES
  • Full duplex integrated PSK modem, including modulation, demodulation, convolutional error correction, scrambling, HDLC framing and network interface
  • Programmable symbol rates 2.4Ksymbols/s up to 14 Msymbols/s
  • Analog/IF interfaces:
    • Dual I/Q baseband inputs, 1Vpp differential
    • 70 MHz IF input: -50 to +5 dBm, 50 Ohm
    • 140 MHz IF input: -50 to +5 dBm, 50 Ohm
    • Outputs: dual I/Q baseband outputs, 2Vpp differential, 0.5V common mode
  • Convolution error correction, rates 1/2, 2/3, 3/4, 5/6 and 7/8.
  • Serial HDLC to transmit empty frames over the synchronous link when no payload data is available
  • V.35 scrambling to randomize the modulated data stream
  • Data interface:
    • 10/100 Ethernet LAN with built-in TCP server (COM-1704) or IP router (COM-1705)
    • USB 2.0
    • Synchronous serial interfaces: RS-422, LVDS
  • Small size (3x3x0.3) and low power (2W)
  • Modulation: BPSK/QPSK/OQPSK with output spectral shaping filter: raised cosine square root filter with 20% rolloff
  • Demodulator acquisition and tracking threshold: -1 dB Eb/No (2dB Eb/No when coded with rate FEC)
  • Other options available at the time of order:
    • +5VDC unregulated vs +3.3VDC regulated supply
    • TCXO vs external frequency reference

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    COM-1704/1705
    Other Demodulators
    Spread-Spectrum
    FSK/MSK/GFSK/GMSK
    PSK/QAM/APSK
    Documentation
    Specifications (666 KB)
    Schematics
    USB 2.0 User manual
    $395 COM-1704 module
    (with TCP server)
    $395 COM-1705 module
    (with IP router)