FX506

更新时间： 2024-11-20 22:51:03

品牌	Logo	应用领域
CMLMICRO		晶体晶体管开关光电二极管无线
页数	文件大小	规格书
17页	199K
描述
Mobile Radio Audio Processor

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FX506 数据手册

CML Semiconductor Products

PRODUCT INFORMATION

Mobile Radio Audio Processor

FX506

Publication D/506/3 July 1994

Features/Applications

Military/Marine and Mobile

Radio Applications

Full Rx and Tx Filtering to

CEPT Standards

FM/AM/SSB Applications

Digital Control of Volume,

Noise Squelch and R.S.S.I.

16-kbit Data and Voice Scrambler

Compatible

Tx VOGAD Circuitry

Low-Power 5-Volt CMOS

Process

Serial µP Control of ALL Chip

Functions

Deviation Limiter

EXTERNAL AUDIO

PROCESSES

4.0MHz

AUDIO

RSSI

RECEIVER

REF.

MODULATION

TRANSMITTER

VCO

CTCSS and DATA

Tx AUDIO

FX506

MIC.1

Single-Chip

Audio Processor

MIC.2

SERIAL

BUS

SQUELCH/CARRIER

DETECT

SYSTEM

HIGH

SQUELCH

LOW

µP

VOLUME

DOWN

Brief Description

The Post-Process Path can adjust and prepare

the input audio for output to the chosen transmitter

driver or loudspeaker amplifier.

The FX506 is a µProcessor-controlled, single-chip

device containing ALL the circuit elements necessary

to perform the audio functions of a mobile (or portable)

radio system.

On-chip signal paths include: speech-band/pre-

emphasis filters, variable gain/attenuation stages,

voice-compression and deviation limiter circuitry.

Each function in the signal path can be addressed or

by-passed –– providing “real-time,” dynamic control ––

by the µProcessor. This half-duplex device comprises

two separate audio signal paths.

The Pre-Process Path performs filtering and level

adjustment on audio (Rx or Tx) for use in auxiliary

systems such as “Frequency Inversion Scrambling,”

“Sub-Audio” tone or “In-Band” data signalling. This path

is output at the “Pre-Process Audio Output” pin. If no

external processes are being used this output should

be connected to the “Pre-process Audio Input” pin.

Suitably software configured, the FX506, which can

operate on voice, direct-digital or tone-data and sub-

audio frequencies, is compatible with FM, AM and

SSB type transceivers. Digital gain elements are

provided on-chip for dynamic control and balance of

signal-path levels during manufacturing, test and

operation.

System Squelch, a separate path, is sourced from

either the incoming signal or Received Signal

Strength Indication (R.S.S.I.) from the radio circuitry.

The FX506, a low-power 5-volt CMOS device, is

available in 24-pin/lead plastic DIL and SMD

packages.

12 3 4 5 6 7...17

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