Product specifications

CDM-710 Broadcast Satellite Modem Revision 10
Introduction MN/CDM710.IOM
The modem is compact, being 1RU high x 18.65 inches deep with low power consumption. It has
a front panel VFD display and keypad for local configuration and control, although it can be fully
remote-controlled via a RS-485 bus or 10/100 Base-T Ethernet Interface.
A block diagram of the modulator is shown in Figure 1-2.
Data
Interface
Slot 1
(Option)
Data
Interface
Slot 1
(Option)
Data
Interface
Slot 2
(Option)
Data
Interface
Slot 2
(Option)
EIA-
232/485
EIA-
232/485
Ethernet
10/100
BaseT
Ethernet
10/100
BaseT
Alarms
Alarms
Keypad
&
Display
Keypad
&
Display
uP
uP
Power
Supply
Power
Supply
CDM-710
Tx
70 / 140MHz
Or L-Band
Remote
Port
Ethernet
Alarms
DVB-S2
LDPC
+ BCH
DVB-S &
DSNG
Viterbi+RS
FEC
DVB-S2
LDPC
+ BCH
DVB-S &
DSNG
Viterbi+RS
FEC
Modulator
Future
Framer
Future
Mode
&
Stream
Adaptation
Future
Mode
&
Stream
Adaptation
Mapping
&
Pilot
Insertion
Mapping
&
Pilot
Insertion
Nyquist
Filters
Nyquist
Filters
Up
Converter
Up
Converter
Depends
On
Selected
Interface
Demodulator & FEC
Tx
Synth
Tx
Synth
Down
Converter
Down
Converter
Rx
Synth
Rx
Synth
Demod
Decoder
Demod
Decoder
Rx
70 / 140MHz
Or L-Band
Figure 1-2. Block Diagram
1.2 Standard and Optional Features
The modem operates in DVB-S (QPSK), DVB-DSNG (8-PSK and 16-QAM) and DVB-S2
(QPSK, 8-PSK, 16-APSK, and 32-APSK) modes. The modem is operated from the front panel
using the keypad and display or remote controlled via an RS-232 / RS-485 2/4 Wire bus or
10/100 Base-T Ethernet port located on the base modem.
The modem is available for either 70/140 MHz or L-Band applications. The standard 70/140 MHz
Tx-IF port has a BNC female connector that is programmable for either with 50Ω or 75Ω
impedance operations. Spectral rolloffs of 20, 25, and 35% are available.
1–2