ST-135 www.sigtek.com Software Radio Demodulator Features • Demodulates BPSK, DBPSK, QPSK, DQPSK, OQPSK, MSK, and FSK • PSK symbol rates from 1.2 kS/s to 16 MS/s • FSK symbol rates from 1.2 kS/s to 500 kS/s • Phase estimator assisted TDMA burst acquisition • Tuning resolution of 1 Hz • JavaTM remote control over TCP/IP interface • NT device drivers (SolarisTM drivers optional) • TDM, TDMA, Push-to-Talk, SCPC • Matched filter CDMA spread spectrum RX (opt.) • FEC decoder (opt.) for demodulating diverse signals A member of Filtronic Sigtek’s high performance VME software radio family, the ST-135 high performance software radio demodulates a growing set of signals including BPSK, DBPSK, QPSK, DQPSK, FSK and MSK. Bit rates from 1.2 Kbps to 32 Mbps with future growth to 40 Mbps and beyond. The expandable software radio architecture allows addition and enhancement of demodulation types. Control software includes a JavaTM control application for TCP/IP remote operation and NT device drivers. Options include a direct sequence CDMA spread spectrum receiver and FEC decoder. ST-135 Software Radio Block Diagram CDMA Despread (optional) Analog IF Analog Tuner/ADC Digital Down Converter I Q Digital Demod Carrier NCO ST-135 VME Card I and Q Capture FEC Capture (optional) Soft Decisions Bit Mapper Symbol NCO INPUT IF: Level: External Reference: Connector: 120 to 200 MHz 45 to 95 MHz (optional) -10 to -60 dBm 10 MHz SMA, 50 ohm OUTPUT Soft decision bits: X-Y constellation: RS-422 and VME P2 SMA, high impedance scope DEMODULATION Signals: Rates: Burst acquisition: Carrier error tracking: Double width VME: 6U x 160mm Ordering Information ST-135-xxx Burst Demod -000 : Analog input -ECL : ECL input -DMF : CDMA option -FEC : FEC option BPSK, DBPSK, QPSK, DQPSK, FSK, and MSK PSK from 1.2 kS/s to 16 MS/s FSK from 1.2 kS/s to 500 kS/s Phase estimator assisted 5% of symbol rate FEC Decoder/Capture (optional) Viterbi FEC: Capture buffer: 1/2, 3/4, and 7/8 with constraint length 7 2 Msamples x 16-bit I and Q Direct Sequence CDMA Spread Spectrum Receiver (optional) Signals: Chip rates: Sequence Length: Acquisition: BPSK and QPSK 1 MHz to 16 MHz 24 to 221 (SRAM loadable) 1024 length, matched filter assisted, serial despreader *Chassis are available upon request 9075 Guilford Road, C-1 • Columbia, MD 21046 • 410-290-3918 • 410-290-8146 fax 001-0135-700 Rev. 1