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HSP50307 Datasheet Burst QPSK Modulator

Manufacturer: Intersil (now Renesas)

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General Description

The HSP50307 is a mixed signal burst QPSK Modulator for upstream CATV Applications.

The HSP50307 demultiplexes and modulates a serial data stream onto an RF Carrier centered between 8 and 15MHz.

The signal spectrum is shaped with α = 0.5 root raised cosine (RRC) digital filters.

Overview

HSP50307 December 1996 Burst QPSK Modulator.

Key Features

  • 256 KBPS Data Rate and 128 KBPS Baud Rate.
  • Burst QPSK Modulation.
  • Programmable Carrier Frequency from 8MHz to 15MHz With a Frequency Step Size of 32kHz.
  • α = 0.5 Root Raised Cosine (RRC) Filtering For Spectrum Shaping.
  • On-Board Synthesizer.
  • Programmable Output Level From 22 to 62dBmV in 1dB Steps.
  • Programmable Charge Pump Current Control.
  • 62dBmV Differential Output Driver for 75Ω Cable.

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