beautypg.com

Description, 1 description – Comtech EF Data SNM-1002 User Manual

Page 21

background image

SNM-1002 LinkSync™ Modem

Revision 2

Introduction

MN/SNM1002.OM

1–3

Figure 1-3. Typical LinkSync Redundancy

1.2.1 Description

The modem contains:

Built-in scramblers/descramblers

TX and RX frequency synthesizers

Differential encoder/decoder

Multi-rate FEC convolutional Viterbi Decoder



The modem is a complete, self-contained unit in a standard, one-rack unit (1 RU), 19-
inch (48 cm), rack-mountable enclosure weighing approximately 9 lbs. (4 kg). The unit
was constructed using modular design (Figure 1-4), and consists of from two to five
Printed Circuit Boards (PCBs), depending on the configuration. The modem consists of
two, major, replaceable assemblies as follows:

• Rear panel, main PCB, and power supply
• Upper and lower enclosures (chassis) and the front panel