Comtech EF Data CDM-500 Installation And Operation Manual page 9

Satellite modem

Table of Contents

Preface

6.10 UTIL (Utility) ............................................................................................................................................. 6-25

6.10.1

(UTIL) SET-RTC (Set real-time clock) ............................................................................................ 6-25

6.10.2

(UTIL) DISPLAY (Display brightness)............................................................................................ 6-25

6.10.3

(UTIL) MAN-1:1 (Manual 1:1 switchover) ...................................................................................... 6-25

6.10.4

(UTIL) RECENTER-BUF (re-center buffer) .................................................................................... 6-25

6.10.5

(UTIL) ID (Circuit ID)...................................................................................................................... 6-26

CLOCKING .........................................................................................7-1

CHAPTER 7.

7.1

Transmit Clocking........................................................................................................................................ 7-1

7.1.1

Internal Clock .......................................................................................................................................... 7-1

7.1.2

External Clock ......................................................................................................................................... 7-1

7.1.3

Loop-Timed............................................................................................................................................. 7-2

7.2

Receive Clocking .......................................................................................................................................... 7-2

7.2.1

Buffer Disabled ....................................................................................................................................... 7-2

7.2.2

Buffer Enabled, Rx=Tx ........................................................................................................................... 7-2

7.2.3

Buffer Enabled, Rx<>Tx ......................................................................................................................... 7-2

7.3

X.21 Notes ..................................................................................................................................................... 7-2

EDMAC CHANNEL .............................................................................8-1

CHAPTER 8.

8.1

Theory Of Operation ................................................................................................................................... 8-1

8.2

M&C Connection ......................................................................................................................................... 8-2

8.3

Setup Summary ............................................................................................................................................ 8-3

SUMMARY OF SPECIFICATIONS .................................................... A-1

APPENDIX A.

A.1

Modulator .....................................................................................................................................................A-1

A.2

Demodulator .................................................................................................................................................A-2

A.3

Data Interfaces..............................................................................................................................................A-3

A.4

Miscellaneous................................................................................................................................................A-3

A.5

Approvals ......................................................................................................................................................A-3

REMOTE CONTROL.......................................................................... B-1

APPENDIX B.

B.1

Introduction ..................................................................................................................................................B-1

B.2

EIA-485 .........................................................................................................................................................B-1

B.3

EIA-232 .........................................................................................................................................................B-2

B.4

Basic Protocol ...............................................................................................................................................B-2

CDM-500 Satellite Modem

Rev. 1.3

Table of Contents