The Digital Quadrature Tuner (DQT) provides many of the functions required for digital demodulation. These functions include carrier LO generation and mixing, baseband sampling, programmable bandwidth filtering, baseband AGC, and IF AGC error detection. Serial control inputs are provided which can be used to interface with external symbol and carrier tracking loops. These elements make the DQT ideal for demodulator applications with multiple operational modes or data rates. The DQT may be used with HSP50210 Digital Costas Loop to function as a demodulator for BPSK, QPSK, 8-PSK OQPSK, FSK, FM, and AM signals.

Features
• Input Sample Rates to 52MSPS
• Internal AGC Loop for Output Level Stability
• Parallel or Serial Output Data Formats
• 10-Bit Real or Complex Inputs
• Bidirectional 8-Bit Microprocessor Interface
• Frequency Selectivity <0.013Hz
• Low Pass Filter Configurable as Three Stage Cascaded-Integrator-Comb (CIC), Integrate and Dump, or Bypass
• Fixed Decimation from 1-4096, or Adjusted by NCO Synchronization with Baseband Waveforms
• Input Level Detection for External IF AGC Loop
• Designed to Operate with HSP50210 Digital Costas Loop
• 84 Lead PLCC

Applications
• Satellite Receivers and Modems
• Complex Upconversion/Modulation
• Tuner for Digital Demodulators
• Digital PLLs
• Related Products: HSP50210 Digital Costas Loop; A/D Products HI5703, HI5746, HI5766
• HSP50110/210EVAL Digital Demod Evaluation Board