Comtech EF Data CDD-880, Installation And Operation Manual

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CDD-880 Multi Receiver Router MN-CDD880
Introduction Revision 2
1–10
1.4.3.1 Receive
Parameter Specifications
Data Rate (each Demodulator) 16 kbps to 15.35 Mbps, in 1 bps step (CCM Mode) (Modulation and FEC dependent)
Maximum Aggregate Data Rate 50 Mbps
Symbol Rate (Each Demodulator) 16 ksps to 4.5 Msps (CCM Mode)
FEC Mode VersaFEC Decoder (Return Link ACM and VCM modes)
Modulation and Code Rates, Data
Rate Ranges
•
BPSK 0.488 16 kbps – 2.19 Mbps
• QPSK 0.533 18 kbps – 4.8 Mbps
•
QPSK 0.631 21 kbps – 5.56 Mbps
•
QPSK 0.706 23 kbps – 4.8 Mbps
•
QPSK 0.803 26 kbps – 7.22 Mbps
• 8-QAM 0.642 31 kbps – 8.67 Mbps
•
8-QAM 0.711 35 kbps – 9.6 Mbps
•
8-QAM 0.780 38 kbps – 10.53 Mbps
•
16-QAM 0.731 47 kbps – 13.16 Mbps
• 16-QAM 0.780 50 kbps – 14.04 Mbps
•
16-QAM 0.829 54 kbps – 14.91 Mbps
•
16-QAM 0.853 55 kbps – 15.35 Mbps
Figure 1-6. Rx Carrier Level vs. Symbol Rate (L-Band 950 – 2150 MHz)
1.4.3.2 Low Noise Block Down Converter (LNB) Support
Parameter Specifications
Reference (10 MHz)
Supplied through Rx IF center conductor, 10.0 MHz ±0.06 ppm, selectable ON/OFF,
-3.0 dBm ±3 dB
Voltage
Supplied through Rx IF center conductor, selectable ON/OFF, 13V DC, 18V DC, 24V
DC
Current 500 mA, maximum
Current Alarm Programmable MIN and MAX current alarms