Chapter 3: C4/C4c CMTS Specifications
STANDARD Revision 1.0
C4® CMTS Release 8.3 User Guide
© 2016 ARRIS Enterprises LLC. All Rights Reserved.
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RF Electrical Specifications
The following table lists the downstream RF electrical specifications for the C4 and C4c CMTSs.
Table 4.
Downstream RF Electrical Specifications
Specification
16D or XD CAM
Center frequency range supported:
57 - 999 MHz
a
Frequency step size:
125 kHz
b
Modulation types
64QAM, 256QAM
Downstream channel width:
North America (Annex B)
Europe (Annex A)
Europe (using Annex B)
6 MHz
8 MHz
6 MHz with 6 or 8 MHz channel spacing
Annex B symbol rates in Msym/sec
64QAM: 5.056941
256QAM: 5.360537
Annex A symbol rate in Msym/sec
64QAM or 256QAM: 6.952
Raw Bit Rate
Annex B: 64QAM
256QAM
Annex A: 64QAM
256QAM
30.342 Mbps
42.884 Mbps
41.712 Mbps
55.616 Mbps