Comtech EF Data CDM-740, Installation And Operation Manual

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CDM-740 Advanced Satellite Modem Revision 0
Introduction MN-CDM740
1–11
1.5.2 Receive / Demodulator
L-Band Input 950 to 2150 MHz, Type F female
L-Band Input Power Range
-25 to -55 dBm
Data Decapsulation MPE/IP (ETSI EN 301 192 Multi-Protocol Encapsulation)
FEC LDPC+BCH: 5 bit soft decision, proprietary
Operating Modes
DVB-S (ETSI EN 300 421):
•
Rate QPSK 1/2
•
Rate QPSK 2/3
•
Rate QPSK 3/4
•
Rate QPSK 5/6
•
Rate QPSK 7/8
DVB-S2 (ETSI EN 302 307):
•
Rate QPSK 1/4
•
Rate 8-PSK 9/10
•
Rate QPSK 1/3
•
Rate 16-APSK 3/5
•
Rate QPSK 1/2
•
Rate 16-APSK 2/3
•
Rate QPSK 3/5
•
Rate 16-APSK 3/4
•
Rate QPSK 2/3
•
Rate 16-APSK 5/6
•
Rate QPSK 3/4
•
Rate 16-APSK 8/9
•
Rate QPSK 5/6
•
Rate 16-APSK 9/10
•
Rate QPSK 8/9
•
Rate 32-APSK 3/5
•
Rate QPSK 9/10
•
Rate 32-APSK 2/3
•
Rate 8-PSK 3/5
•
Rate 32-APSK 3/4
•
Rate 8-PSK 2/3
•
Rate 32-APSK 5/6
•
Rate 8-PSK 3/4
•
Rate 32-APSK 8/9
•
Rate 8-PSK 5/6
•
Rate 32-APSK 9/10
•
Rate 8-PSK 8/9
Note: Refer to Table 5-2 through Table 5-4 for additional data rate/symbol rate
information.
LNB 10 MHz Reference On center conductor of L-Band input connector, selectable ON/OFF.
Level: -3dBm
±
3 dB.
Source : either Internal modem reference or External reference
Performance: For phase noise, refer to L-Band modulator 10 MHz Frequency
stability same as the modulator 10 MHz reference.
LNB Voltage
On center conductor of L-Band input connector, selectable ON/OFF, 13, 18 volts
per DiSEq 4.2 and 24VDC at 500 mA maximum.
LNB Current Alarm Programmable MIN and MAX current alarms.