Comtech EF Data CDD-562AL, Инструкция по установке и эксплуатации

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CDD-562AL/564A/L Multi-Channel Demodulator Revision 0
Introduction MN-CDD562AL/564AL
1–2
1.1.1 CDD-56xA/L Features
The CDD-56xA/L has many standard and optional features:
•
Fast acquisition demodulator
•
The CDD-564A :
o
Provides a 70/140 MHz IF frequency range from 50 to 90 MHz and 100 to 180 MHz.
•
The CDD-564AL :
o
Provides an L-Band IF frequency range from 950 to 2250 MHz.
o
Supports external Low-Noise Block Down Converters (LNBs).
o
Consumes only 55 Watts (without LNB).
•
The CDD-564A/L is equipped for 10/100 BaseT Ethernet operation with a number of key
features for Wide Area Network (WAN) bandwidth optimization: very low overhead High-Level
Data Link Control (HDLC) encapsulation, Header and Payload Decompression.
•
The CDD-564A/L offers variable data rates from 16 kbps to 10.239 Mbps, in BPSK, QPSK, 8-
PSK, 8-QAM, and 16-QAM modes.
•
The CDD-564A/L provides, as Forward Error Correction (FEC) options: Turbo Product Coding
(TPC, IESS-315 compliant), ULL (Ultra Low Latency), and VersaFEC® (a short-block, low
latency Low-density Parity Check Coding (LDPC)).
•
The CDD-564A/L is compact – it is 1RU high, with a depth of 17.25 inches
•
The CDD-564A/L has an integrated 10/100 BaseT Ethernet interface for network-based remote
product M&C – including SNMP, HTTP (non-secure Web server), and Telnet.
1.2 Functional Description
The demodulator has three interface types: IF Ethernet (data), Traffic Ethernet (data) and M&C 100
(Dedicated Management Port).
• The IF interface provides independent unidirectional links (Rx only) with the satellite via the
downlink equipment.
• The Traffic Ethernet interface is a bidirectional path, which connects with the customer’s
equipment through an Ethernet Switch. The Ethernet interface is a 10/100 BaseT Ethernet port
where data flow is the combined output of the demodulator channels. Control and status
information also uses this port, if the Dedicated Management Port is disabled.
• The M&C Ethernet interface is a 10/100 Ethernet Port. It is used only for managing the modem
over Web/SNMP/Telnet when Dedicated Management Port operation is enabled. The modem can
be managed only through this M&C Ethernet port when Dedicated Management Port operation is
enabled. In Dedicated Management Port mode, the Traffic 100 port aggregates the data from all
demodulators, and the unit is not accessible for M&C, except through the M&C 100 port.
The10/100 Ethernet M&C port is inactive when Dedicated Management Port operation is
disabled.
In both L-Band and 70/140 MHz operation, receive signals are first converted to a UHF frequency for
SAW filtering. Then, they are down converted to a lower IF frequency for direct sampling in a high speed