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1.1
Overview
The CDM-710G High-Speed Satellite Modem (Figure 1-1) provides transmission of data using
the same powerful DVB-S2 techniques developed for video delivery in Digital Video Broadcast
(DVB) applications. It operates over satellite links with programmable symbol / data rates up to
45 Msps. The CDM-710G is intended for transmission of non-MPEG2 data. Its companion
product, the CDM-710, supports MPEG2 formats with various data interfaces.
Figure 1-1. CDM-710G High-Speed Satellite Modem (L-Band version shown)
Various modulations and coding combinations compliant with DVB-S2 are provided. The
modulation types supported include DVB-S2 QPSK, 8PSK, 16APSK and 32APSK.
Note: DVB-S and DVB-DSNG are not supported.
Constant Coding and Modulation (CCM) operation with a single input stream is provided for
operation. The unit is available in modulator only, demodulator only, and modem configurations.
The operating frequency of the CDM-710G is available in the following versions:
CDM-710G (70/140 MHz)
CDM-710GL (L-Band)
The terrestrial data interfaces, as depicted in the block diagram shown in Figure 1-2, are field
removable to allow different interface types:
•
CDI-10-1 Single G.703 E3/T3/STS1 Interface
•
CDI-60 HSSI Interface
•
CDI-70 1000 Base-T Ethernet (GigE) Interface
The CDM-710G is compact, being 1RU high x 18.65 inches deep, with low power consumption.
It has a front panel Vacuum Fluorescent Display (VFD) and keypad for local configuration and
Chapter 1. INTRODUCTION
52 to 88 MHz and 104 to 176 MHz in 100 Hz resolution
950 to 1950 MHz in 100 Hz resolution
1–1
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