CDM-Qx Satellite Modem

Revision 5

Introduction

MN/CDMQx.IOM

1.4FAST Options and Hardware Options

The Modem is extremely flexible and powerful, and incorporates a large number of optional features. Some customers may not require all of these features, and therefore, in order to permit a lower initial cost, the Modem may be purchased with only the desired modules and features enabled. If, at a later date, a customer wishes to upgrade the functionality of a modulator or demodulator, Comtech EF Data provides a system known as FAST (Fully Accessible System Topology) which permits the purchase and installation of options through the use of special authorization codes, entered through the front panel, or remotely.

The base configuration of the modulators and demodulators are equipped with Viterbi and R-S codecs. It offers modulation types, and data rates up to 5 Mbps. It is, however, limited to Closed Network operation.

The following table shows what other options are available:

 

Modulator & Demodulator

 

 

Description and Comments

 

 

Option

 

 

 

 

 

 

Installation

 

 

Options

 

 

 

 

 

 

 

 

 

 

 

Method

 

 

 

 

 

 

 

 

 

 

Low Rate Variable

 

 

Data rate 32 kbps to 5 Mbps

 

 

Base Unit

 

 

Mid-Rate Variable

 

 

Data rate 32 kbps to 10.0 Mbps

 

 

FAST

 

 

Full Rate Variable

 

 

Data rate 32 kbps to 20.0 Mbps

 

FAST

 

 

8-PSK

 

 

Modulation Type

 

 

FAST

 

 

16-QAM

 

Modulation Type

 

FAST

 

 

DoubleTalk Carrier-in-Carrier

 

128 ksps – 512 kbps

 

FAST

 

 

DoubleTalk Carrier-in-Carrier

 

128 ksps – 1 Mbps

 

FAST

 

 

DoubleTalk Carrier-in-Carrier

 

128 ksps – 2.5 Mbps

 

FAST

 

 

DoubleTalk Carrier-in-Carrier

 

128 ksps – 5 Mbps

 

FAST

 

 

DoubleTalk Carrier-in-Carrier

 

128 ksps – 1.0 Mbps

 

FAST

 

 

 

 

 

 

 

 

 

DoubleTalk Carrier-in-Carrier

 

128 ksps – 20 Mbps

 

FAST

 

 

Redundancy Capability

 

 

1:1 or 1:2 or 1:3 Redundancy

 

FAST

 

 

Turbo Codec – high rate

 

 

20 Mbps Turbo Codec

 

 

Hardware

 

 

High Stability Reference

 

Internal 10 MHz reference – 0.1 x 10-6

 

 

Hardware*

 

 

Low Stability Reference

 

Internal 10 MHz reference – 1 x 10-6

 

 

Hardware*

 

 

75Ω TX/RX Impedance

 

 

75Ω impedance with BNC female connectors

 

 

Hardware*

 

 

50Ω TX/RX Impedance

 

 

50Ω impedance with N female connectors (L-

 

 

Hardware*

 

 

 

 

 

Band)

 

 

 

 

*Factory installed only.

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Mocomtech CDM-QX operation manual Fast Options and Hardware Options