DESCRIPTION
The VES 1993 is a single-chip channel receiver for satellite television reception which matches both DSS and DVB-S standards. The device contains a dual 6-bit flash analog to digital converter, variable rate BPSK/QPSK coherent demodulator and Forward Error Correction functions.The ADCs directly interface with I and Q analog baseband signals.

FEATURES
• DSS and DVB-S compatible single chip demodulator & forward error correction.
• Dual 6-bit ADC on chip.
• PLL for crystal frequency multiplication.
• Variable rate BPSK/QPSK coherent demodulator.
• Modulation rate from 1 to 45MBaud.
• Automatic Gain Control output.
• Digital symbol timing recovery : Acquisition range up to ±240ppm
• Digital carrier recovery : Acquisition range up to ±12% of symbol rate
• Half Nyquist baseband filters on chip roll-off = 0.35 for DVB and 0.2 for DSS
• Channel quality estimation.
• Viterbi decoder : Supported rates : from 1/2 to 8/9. Constraint length K = 7 with G1 = 171 8 G2 = 1338 VBER measurement provided.
• Convolutional deinterleaver and Reed Solomon decoder according to DVB and DSS specifications.
• Automatic Frame Synchronization.
• Selectable DVB-S descrambling.
• I2C bus interface.
• 100-pin MQFP package.
• CMOS technology (0.35 µm 3.3V).

APPLICATIONS
• DSS receivers.
• DVB-S receivers (ETS 300-421).
• Direct Broadcast Satellite (DBS).