Comtech EF Data LPOD Manual do Utilizador descarregar pdf (Página 1)

www.comtechefdata.com

Modems

CDM-625 Advanced Satellite Modem

with DoubleTalk

Carrier-in-Carrier

Overview

The CDM-625 Advanced Satellite Modem builds on Comtech EF Data’s legacy of providing the most

efficient satellite modems. It is the first modem to combine advanced Forward Error Correction (FEC) such

as VersaFEC



and Low Density Parity Check (LDPC) codes with the revolutionary DoubleTalk



Carrier-in-

Carrier



bandwidth compression, allowing for maximum savings under all conditions. This combination of

advanced technologies enables multi-dimensional optimization, allowing satellite communications users to:

 Minimize operating expenses (OPEX)

 Maximize throughput without using additional transponder resources

 Maximize availability (margin) without using additional transponder resources

 Minimize capital expenses (CAPEX) by allowing a smaller BUC/HPA and/or antenna

 Or, a combination to meet specific business needs

Features

 DoubleTalk Carrier-in-Carrier bandwidth

compression

 Adaptive Coding and Modulation (ACM)

 IP Packet Processor with header compression,

payload compression and advanced Quality of

Service (QoS)

 Dual Band Capability: 70/140 MHz and L-Band in

same unit

 Data Rate: 18 kbps to 25 Mbps

 Symbol Rate: 18 ksps to 12.5 Msps

 Modulation: BPSK, QPSK/OQPSK, 8-PSK/8-

QAM, 16-QAM

 FEC: Viterbi, Sequential, Concatenated Reed

Solomon, TCM, Turbo Product Code (TPC)

(IESS-315 Compliant), LDPC Code and

VersaFEC (low-latency LDPC)

 Widest Range of data interfaces: EIA-422/530,

V.35, G.703 T1, G.703 E1, G.703 T2, G.703 E2,

Quad G.703 E1, ASI, LVDS, HSSI, 4-port

10/100Base-T Ethernet

 4-port managed Ethernet switch with VLAN and

QoS

 Sub Mux to multiplex IP/Ethernet traffic with serial

or G.703 traffic

 Drop & insert for T1/E1

 Enhanced D&I++ for single T1/E1 & quad E1

 Management: 10/100Base-T Ethernet with

SNMP, Distant End SNMP Proxy, HTTP, Telnet

and EIA-232/EIA-485

 Embedded Distant-end Monitor and Control

(EDMAC)

 Automatic Uplink Power Control (AUPC)

 Engineering Service Channel (ESC/ESC++)

 Standard high-stability internal reference

(± 6 x 10

-8

)

 5-tap Adaptive Equalizer

 L-Band TX: 10 MHz reference for BUC, FSK

communications and optional BUC power supply

 L-Band: Advanced FSK for LPOD M&C

 L-Band RX: 10 MHz reference and LNB power

supply

 Open network modes

 CDM-600/L emulation mode

 1:1 and 1:10 redundancy switches available

 Backwards compatible with CDM-500/CDM-550,

CDM-550T, CDM-570/L and CDM-600/L

Satellite Modems

 Interoperable with many Comtech EF Data

Satellite Modems: CDM-Qx/L, SDM-8000, 300A,

and 300L3

Doubletalk Carrier-In-Carrier

DoubleTalk Carrier-in-Carrier is based on patented bandwidth compression technology originally developed

by Applied Signal Technology, Inc. Using “Adaptive Cancellation” it allows transmit and receive carriers of a

two-way link to share the same transponder space.

Typical Users

•

Mobile Operators

•

Telecom Operators

•

Satellite Service

Providers

•

Government & Military

•

Enterprise

•

Offshore

Common Applications

•

Mobile Backhaul

•

G.703 Trunking

•

IP Trunking

•

Offshore & Maritime

Communications

•

Enterprise

•

Communications on-

the-Move

•

Satellite News

Gathering

1 2 3 4 5 6

Resumo do Conteúdo

Página 1 - Carrier-in-Carrier

www.comtechefdata.com Modems CDM-625 Advanced Satellite Modem with DoubleTalk® Carrier-in-Carrier® Overview The CDM

Página 2 - Figure 1 Figure 2

Adaptive Coding & Modulation (ACM) Satellite users have traditionally relied on worst case link margin to overcome rain fade which leads to signi

Página 3

Dual Band Capability CDM-625 supports 70/140 MHz and L-Band capability in the same unit with independently selectable transmit and receive IF. This si

Página 4 - Specifications

Feature Enhancements Enhancing the capability of the CDM-625 in the field is easy. Features that do not require additional hardware can be added on si

Página 5

Output Impedance & Return Loss 50-180 MHz: 50 /75 , 16 dB minimum return loss (18 dB typical), BNC connector 950-2000 MHz: 50 , 19 dB mini

Página 6 - CDM-625 Rear Panel

2114 West 7th Street, Tempe, Arizona 85281 USA Voice: +1.480.333.2200 ● Fax: +1.480.333.2540 ● Email: [email protected]. Patents 7,