Burst Qpsk Modulator Corporation

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 cen- tered between 8 and 15MHz. The signal spectrum is shaped with = 0.5 root raised cosine (RRC) digital lters. On-chip l- tering limits spurs and harmonics to levels below -35dBc dur- ing transmissions. The output power level is adjustable over a 40dB range in 1dB steps. The maximum differential output level is +62dBmV into 75. A transmitter inhibit function dis- ables the RF output outside the burst interval. The differential output amplier int7-erfaces to the cable via a transformer. The Block Diagram of the HSP50307 QPSK Modulator is shown below. The HSP50307 consists of a digital control Interface an I/Q generator, a synthesizer, and a quadrature Modulator The data Clock is derived from the master Clock The HSP50307 demultiplexes the input data bits into in-phase (I) and quadrature (Q) data streams. The rst bit and subsequent alternating bits of the burst are in-phase data. The two data streams are ltered, converted from digital to Analog and low pass ltered to produce the baseband I and Q Analog signals. By Intersil Corporation
HSP50307 's PackagesHSP50307 's pdf datasheet

HSP50307 Pinout, Pinouts
HSP50307 pinout,Pin out
This is one package pinout of HSP50307,If you need more pinouts please download HSP50307's pdf datasheet.

HSP50307 Application circuits
HSP50307 circuits
This is one application circuit of HSP50307,If you need more circuits,please download HSP50307's pdf datasheet.

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