Chapter 8: Downstream Cable Access Modules (DCAMs)
STANDARD Revision 1.0 C4® CMTS Release 8.3 User Guide
© 2016 ARRIS Enterprises LLC. All Rights Reserved. 248
Downstream Frequency Range
The 16D and XD CAMs support the DOCSIS/EuroDOCSIS 3.0 extended frequency range of 85-999 MHz for Annex A and of
57-999 MHz for Annex B.
Note: The 16D hardware supports downstream center frequencies up to 999 MHz, but for the best performance, it is
advisable to go no higher than 960 MHz.
The following command sets the minimum downstream center frequency for all channels within the chassis:
configure cable freq-ds-min {57 | 85 | 91 | 112} [no]
The following command sets the maximum downstream center frequency for all channels within the chassis:
configure cable freq-ds-max {858 | 867 | 999} [no]
Table 32. Downstream Center Frequency Ranges Per Annex
The standard values shown in bold in the table above are the defaults.
If the no parameter is included in these commands, it sets the downstream center frequency range to the default values
based on the current annex.
The configure cable freq-ds-min and configure cable freq-ds-max commands do not permit an overlap with the current
upstream frequency range.
To display the downstream center frequency range, use the following command:
show cable global-settings
Sample system output:
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