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Comtech EF Data SMS-451 User Manual

Page 21

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SMS-451 Sateliite Switch

Revision 0

Introduction

MN/SMS451.IOM

1–7

Figure 1-6. SMS-451 Block Diagram with SDM-2020 Modulator and Demodulator with a

HSSI Interface


TT

ST

SD

CA

RT
RD

Cisco

Router

DTE

TT
SD

SMS-

451E

Data

Section

Of

Switch

TT

CA

x

SD

CA

x

SDM-2020

Modulator

ST

ST

SDM-2020

Modulator

DCE

Y-Cable

TA

DCE

Tx

IF

Tx

IF

SMS-

451E

IF

Section

Of

Switch

x = No Connection

Tx

IF

RD

CA

x

SDM-2020

Demodulator

RT

SDM-2020

Demodulator

Rx

IF

Rx

IF

Rx

IF

RD

CA

x

RT

Loop

Test

Translator

(L-Band)

70 MHz

IF

L-Band

or

70/170

IF

DCE

DTE

DCE

DTE

Y-Cable, PL/7126-1

Cable,
ECL (Switch) To
HSSI (Router)
PL/6697-1(Standard)

-1 = 4 ft (1.2 meter)
-2 = 6 ft (1.8 meter)
-3 = 8 ft (2.4 meter)