Comtech EF Data CDM-710G, Installation And Operation Manual

Page: 38 / 246

CDM-710G High-Speed Satellite Modem Revision 1
Introduction MN-CDM710G
1–12
1.5 Summary of Specifications
Description Requirements
Type: DVB-S2 EN 302 307
Symbol Rate: DVB-S2 1 to 45 Msps (QPSK, 8PSK), 35 Msps (16APSK), 28 Msps (32APSK)
Data Rate
Corresponds to symbol rate. See paragraph 1.5.7
Symbol Rate / Data Rate See modulator/demodulator
Modulation/FEC:
DVB-S2
QPSK 1/2, 3/5, 2/3, 3/4, 4/5, 5/6, 8/9, 9/10 LDPC + BCH
8PSK 3/5, 2/3, 3/4, 5/6, 8/9, 9/10 LDPC + BCH
16APSK 2/3, 3/4, 4/5, 5/6, 8/9, 9/10 LDPC + BCH
32APSK 3/4, 4/5, 5/6, 8/9, 9/10
Operating Modes CCM only
Transport Streams Only Single Transport Stream supported
Spectral Mask 20%, 25%, or 35% (per DVB- S2) – See
Figure 1-6
and
Table 1-2
.
M&C/Remote Port RS-232 and RS-485 2W/4W with Comtech EF Data protocol
10/100 Base-T Ethernet with HTTP, SNMP or Telnet
Physical (PL) Layer
Scrambling User specified value (one) of n = 0 to 262,141, per EN 302 307.
Pilot Insertion Selection for On or Off
Reflash Ethernet port
Frequency Reference Selectable
Internal Reference 10 MHz for data and IF, stability
±
1.5 ppm
External Clock For data interfaces only, not IF. Clock Input depends upon data interface module.
External Ref 1, 2, 5, 10 or 20 MHz for IF, internally phase locked. Input is 50 or 75 Ω
 compatible
with 0.5 to 4.0 V
p-p
sine or square wave. Requires high stability source.
1:1 Redundancy Built in controller for operation with optional CRS-170A for L-Band and CRS-180 for
70/140 MHz
1: N Redundancy Supported by CRS-300
Fault Form C, see connector pinout information and notes
Configuration Non-volatile for 1-year minimum and returns upon power up.
External Tx Carrier Off TTL low signal – path bypasses microprocessor (Alarm Conn)
Agency Approval Safety, conducted and radiated emissions and Immunity sufficient for CE certification