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Figure 1-2. system block diagram – Comtech EF Data SMS-451 User Manual

Page 17

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SMS-451 Sateliite Switch

Revision 0

Introduction

MN/SMS451.IOM

1–3

The system block diagram (Figure 1-2) shows how the switch provides the interface
between the prime modem, the terminal, and the customer equipment.

RX DATA

J15
J10

J12

SDM-450

FAULT

CA/0813-8

CA/0813-8

SMS-451A

J9

J8

SWITCH J14

FAULT

B

FAULT

A

CA/2590

CA/0813-8

J6
J1

TX DATA

J3

RX IF

J20

TX CLOCK

J4

REMOTE INTERFACE

CA/2674

RX RF

CLK

50 OHM - BNC

CA/0813-8

75 OHM - BNC

J11

CP2

J21
J19

J7
J2

J12

ESC

J5

J14

TX

EXT

TX RF

50 OHM - BNC

75 OHM - BNC

ESC-450

J10

J5

J13

J8

J9

J10

J12

J11

RX

DTA

RX

CLK

TX

CLK

TX

DTA

CP1

A

ALM J4

TWINAX

CABLES

J9

RX

*

TX IF

J18
J11

J13

SDM-450

TX RF

FAULT

50 OHM - BNC

75 OHM - BNC

B

CP1

SWITCH J14

TERR

UNIT

FRAMING

RX RF

CA/0737-4

J26

J27

CP2

B

ESC 2

A

ESC 2

TERR

75 OHM - BNC

50 OHM - BNC

SMS451T

BREAKOUT PANEL

B-141-1

CA/037-8

J28

J25

REMOTE

INTERFACE

J11

CLK

J12

ESC

TX

TERR

J14

EXT

CA/0813-8

CA/0737-4

CA/0813-8

ESC-450

J10

J5

J13

J8

RX

DTA

RX

CLK

TX

CLK

TX

DTA

J9

J10

J12

J11

ALM J4

CA/2590

TWINAX

CABLES

J9

RX

TERR

*

FRAMING

UNIT

Figure 1-2. System Block Diagram