Chapter 3: C4/C4c CMTS Specifications
STANDARD Revision 1.0
C4® CMTS Release 8.3 User Guide
© 2016 ARRIS Enterprises LLC. All Rights Reserved.
83
Specification
16D or XD CAM
RF output level
Overall: 41-60 dBmV
Channels used per connector
c
:
1: 41-60 dBmV 5: 41-51 dBmV
2: 41-56 dBmV 6: 41-50 dBmV
3: 41-54 dBmV 7: 41-49 dBmV
4: 41-52 dBmV 8: 41-49 dBmV
Return loss
> 14 dB in-band
Output impedance
75 Ohms
a
Note: The 16D hardware supports DS center frequencies up to 999 MHz, but for the best performance, it is advisable
to go no higher than 960 MHz. If the 999 MHz is attempted, the downstream maximum frequency must be set
appropriately using the
configure freq-ds-max
command.
b
For the XD CAM, see Spectrum Window and Frequency Grid for Channels on the Same F-connector.
c
The 16D CAM supports 1-4 channels per connector. The XD CAM in Annex B supports 1-4 channels per connector.
The XD CAM in Annex A supports 1-8 channels on connectors 0 and 2; 1-4 channels on connectors 1 and 3.
The following table lists the upstream RF electrical specifications.
Table 5.
Upstream RF Electrical Specifications
Specification
12U/24U
Frequency Range
5 - 65 MHz
RF channel frequency resolution
<1 kHz
Modulation types
Type 4 TLV: QPSK, 16QAM
Type 5 TLV: QPSK, 8QAM, 16QAM, 32QAM, and 64QAM
Raw bit rate (Max.)
30.72 Mbps
RF Input Level (dBmV)
-16 to 29