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Chapter 1. INTRODUCTION
1.1 Introduction
The CDM-Qx, Multi-Channel Satellite Modem with DoubleTalk™ Carrier-in-Carrier® is
a 70/140 MHz (or CDM-QxL with 950MHz-1950MHz L Band operation) modular multi-
channel modem with redundancy contained in a single rack unit (1RU) chassis. The
Modem offers flexibility, redundancy, integration, and performance with four slots
configurable as modulators or demodulators.
The CDM-Qx/QxL supports DoubleTalk Carrier-in-Carrier® option, allowing transmit
(Tx) and receive (Rx) carriers in a full-duplex link to use the same transponder segment.
Figure 1-1. CDM-Qx/QxL