Intersil Corporation ST-114 Datasheet

ST-114

Product
Sheet

The ST-114 is a flexible PC/AT ISA bus evaluation platform for the Intersil HSP50214
Programmable Downconverter.Within a matter of minutes after installation in a PC, the ST­114 is up and running. The board simultaneously generates and tunes signals anywhere
from dc to 20 MHz. Signal types include FM, FSK, BPSK and QPSK. Tuning and
demodulation are completely digital and allow nearly continuous bandwidth and data rate
selection up to 1.2 MHz.

The board is controlled through a Windows interface which allows full access to all
HSP50214 registers, and provides controls and displays for FM, FSK, BPSK and QPSK
signal demodulation. To speed evaluation, the ST-114 includes a Intersil HI5703 10 Bit 40
Msample/sec A/D converter, Texas Instruments TMS320C50 DSP processor, Intersil
HSP45106 Numerically Controlled Oscillator, dual Intersil CA3338A high speed D/A
converters and a 16 bit audio D/A converter.

For rapid prototyping data and control signals can be accessed in a variety of ways. Analog
signals are connected to the HI5703 A/D converter through a rear panel mounted SMA
connector. Alternatively, parallel TTL level digital signals can be input through a ribbon
cable connector on the board. Input samples are then processed by the HSP50214 and
supplied to the TMS320C50 processor. The TMS320C50 implements carrier and data
tracking loops and formats the data for output through the 18 bit audio D/A converter that is
capable of driving standard multi-media speakers. The two CA3338A D/A converters
provide wideband I/Q outputs.

File Number 4305.1

Downconverter Evaluatiuon Board

ST-114

The Intersil HSP45106 NCO and internal bit error rate tester generate either digital or
analog FSK, BPSK or QPSK for loopback testing.

Key Features

• Input: Analog: -10 to -50 dBm, Digital: TTL data + clock

• Output: Audio, I/Q, Clock + Data, Parallel TTL

• DSP: TMS320C50 with JTAG connector

• Signal Generator: FSK, BPSK, QPSK

• Size: PC/AT with ISA bus

Windows™ Display

EXTERNAL CONTROL SIGNALS

ANALOG

EXTERNAL

DIGITAL

ANALOG

OUT

IN

A/D

HI5703

D/A

CA3338A

ST-114 Intersil HSP50214 Downconverter Evaluation Board

DUAL D/A

INPUT

SELECTOR

SIGNAL

GENERATOR

HSP45106

+BERT

HSP50214

DIGITAL

DOWNCONVERTER

PC ISA BUS
INTERFACE

CA3338A

16-BIT

AUDIO DAC

TMS320C50

ST-114 Block Diagram

SIGTEK Inc.
9075 Guilford Road, Suite C-1 • Columbia, MD 21046

[e-mail]

Phone [phone] • Fax [phone]

I OR DATA
O OR CLOCK

AUDIO OUT