DS Spread-Spectrum Modulator 10 Mchip/s

KEY FEATURES

A higher-performance newer generation DSSS modulator is now available: COM-1519

Direct sequence spread-spectrum (DS-SS) Modulator

Programmable chip rates up to 10 Mchip/s

Spreading codes:

• Gold sequences (up to 2²³-1 chips)
• Maximal length sequences, (max length 2²³-1 chips)
• Barker codes (length 11, 13)

Code modulation: BPSK/QPSK/OQPSK with output spectral shaping filter: raised cosine square root filter with 20%, 25%, or 40% rolloff

Internal generation of PRBS-11 pseudo-random bit stream and unmodulated carrier for test purposes

Built-in channel impairments generation:

• additive white Gaussian noise
• frequency offset (Doppler)

Connectorized 3”x 3” module for ease of prototyping. Standard 40 pin 2mm dual row connectors (left, right, bottom). Single 5V supply. Interfaces with 5V and 3.3V logic

ComBlock COMPATIBILITY LIST

Input	Output
COM-1010 Convolutional encoder	COM-1011/1018 DSSS Demodulator (back to back)
COM-7002 Turbo Code Error correction encoder	COM-2001 Digital-to-analog converter (baseband)
COM-8001 Arbitrary waveform signal generator 256MB/1GB	COM-4004 70 MHz IF modulator
	COM-1023 BER generator, AWGN generator
	COM-1024 Multipath simulator