Evaluation Kit for CMX838 Family Radio Processor

2

EV8380 User Manual

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¤2001 MX-COM, Inc.

www.mxcom.com tel: 800 638 5577 336 744 5050 fax: 336 744 5054

Doc. # 20480230.001

4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA

All trademarks and service marks are held by their respective companies.

CONTENTS

Section ..........................................................................................................................Page

1

Preliminary Information ................................................................................................ 4

1.1 Laboratory Equipment........................................................................................................... 4

1.2 Handling Precautions............................................................................................................4

1.2.1

Static Protection...................................................................................................................... 4

1.2.2

Contents - Unpacking ............................................................................................................. 4

2

General Description ...................................................................................................... 4

3

Operation .......................................................................................................................4

3.1 Setting-Up............................................................................................................................. 4

3.2 EV8380 Graphical User Interface (GUI)................................................................................ 6

3.2.1

General Comments................................................................................................................. 6

3.2.2

Starting the EV8380 GUI ........................................................................................................ 6

3.2.3

EV8380 GUI Buttons and Text Boxes .................................................................................... 6

3.2.4

EV8380 GUI Examples: Direct Register Operations .............................................................. 7

3.2.5

EV8380 GUI Examples: Using Text Script Files with the “SEND FILE” Utility ....................... 7

3.2.6

Creating EV8380 Text Script Files ......................................................................................... 7

3.3 EV8380 External Connections ............................................................................................ 10

4

General Notes.............................................................................................................. 11

4.1 Baseband Clock Generation ............................................................................................... 11

4.1.1

Using the RF Reference Oscillator as the CMX838 Clock Source....................................... 11

4.1.2

Using External Sources as the CMX838 Clock Source........................................................ 11

4.2 Subaudio Processing .......................................................................................................... 12

4.2.1

Power-Up Initialization Sequence for CMX838 .................................................................... 14

5

Programming Examples ............................................................................................. 14

5.1 Device Setup ...................................................................................................................... 14

5.2 Tone Signaling Processor Examples .................................................................................. 17

5.2.1

How to Generate a Standard CTCSS Tone ......................................................................... 17

5.2.2

How to Generate A User-Defined TX Subaudio Tone.......................................................... 17

5.2.3

How to Generate an Audio Tone at the AUX I/O Pin............................................................ 17

5.2.4

How to Detect a Standard CTCSS Tone .............................................................................. 18

5.2.5

How to Quickly Enable/Disable Multiple Detectors............................................................... 19

5.2.6

How to Detect a User-Defined Subaudio Tone .................................................................... 20

5.3 Audio Filtering Examples .................................................................................................... 21

5.3.1

How to Generate “Melody Tone” And Process It with the CMX838 ..................................... 21

5.3.2

How to Use Pre-Emphasis/De-Emphasis ............................................................................. 21

5.4 RF Programming Examples ................................................................................................ 22

5.4.1

How to Change an FRS RF Channel ................................................................................... 22

5.4.2

How to Set the IF Offset For A FRS RX Channel................................................................. 22

5.5 Modulation Section Programming Example ........................................................................ 22