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Modems

CDM-570/L & CDM-570/L-IP 

Satellite Modems 

Overview 

The CDM-570 and the CDM-570L are Comtech EF Data’s entry-level satellite modems that provide industry 
leading performance and flexibility in a 1 RU package at a very competitive price.  Designed to address the 
market for low-cost terminals, the modems are available with 70/140 MHz or L-Band IF and EIA-530/-422, 
V.35, EIA-232 and G.703 data interfaces. An optional Internet Protocol (IP) Module with 10/100Base-T 
Ethernet port is available for IP-centric applications. 

Typical Users 

• 

Enterprise 

• 

Internet Service 
Providers 

• 

Satellite Service 

Features 

 

Automatic Uplink Power Control (AUPC) 

 

Data rate range from 2.4 kbps to 9.98 Mbps 

 

Embedded Distant-end Monitor and Control 

Providers 

 

CDM-570 & CDM-570-IP: 50 to 90 or 100 to 180 

(EDMAC/EDMAC2) 

MHz IF range 

 

Redundancy options 

• 

Offshore & Maritime 

CDM-570L & CDM-570L-IP: 950 to 2000 MHz IF 

 

CDM-570 & CDM-570-IP: FSK 

range 

communications to CSAT-5060 or 

• 

Mobile Operators 

 

Modulation types: BPSK, QPSK, OQPSK, 8PSK, 

KST-2000A 

Patented 8-QAM, 16-QAM 

 

CDM-570L & CDM-570L-IP: 10 MHz reference 

Common Applications 

 

Forward Error Correction (FEC) choices include 
Turbo Product Code (TPC), Viterbi, Reed-

for BUC, FSK communications and optional 
BUC power supply 

• 

Mobile Backhaul 

Solomon, and Trellis Coded Modulation (TCM) 

 

Data Interfaces: EIA-422/530, V.35, G.703 T1/E1 
(option), 10/100Base-T Ethernet (option) 

 

CDM-570L & CDM-570L-IP: 10 MHz reference 
and power supply for LNB 

 

Optional, integrated IP Module with 

• 

Communications on­
the-Move 

 

Standards based management via SNMP, Web, 
or Telnet 

 

Symmetric as well as asymmetric operation for 
maximum bandwidth efficiency 

10/100Base-T Ethernet port (CDM-570-IP and 
CDM-570L-IP) 

Static IP routing for unicast and multicast 

Header and payload compression for 

• 

Disaster Recovery & 
Emergency 
Communications 

 

Support for mesh, star and hybrid network 
topologies 

maximum efficiency 

IGMP v1 and v2 

• 

Enterprise 

 

G.703 clock extension for IP backhaul (option) 

 

Fast acquisition demodulator (

±

 

32 kHz 

acquisition range, 64 kbps, Rate 1/2 QPSK: 
150 ms average) 

VLAN capability with 802.1Q compliant 
QoS 

Vipersat Management System (VMS) 
integration 

• 

Offshore & Maritime 
Communications 

• 

Satellite News 
Gathering

Turbo Product Coding

The optional Turbo Product Codec delivers significant performance improvement when compared to Viterbi 
with concatenated Reed-Solomon. It offers increased coding gain, lower decoding delay, and significant 
bandwidth savings compared to traditional FEC. 

EDMAC & AUPC Operation

The CDM-570/L-IP has the ability to monitor and control the distant end of a point-to-point satellite link using EDMAC or EDMAC2. User 
data is framed and bits are added to pass control, status, and AUPC information. This is transparent to the user. 

Management

The modems support SNMP, web-based and command line interfaces for management. The modems can also be configured and 
monitored from the front panel, or through the remote M&C port (for non-IP mode of operation). Ten complete RF configurations may be 
stored in the modem. An event log stores alarm and status information in non-volatile RAM, while the link statistics log stores link 
performance (Eb/No and AUPC performance) for monitoring and reporting purposes. 

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