Chapter 46: Command Line Descriptions
STANDARD Revision 1.0 C4® CMTS Release 8.3 User Guide
© 2016 ARRIS Enterprises LLC. All Rights Reserved. 1477
configure interface cable-downstream * cable frequency
Sets the center frequency for a downstream channel of a DCAM in Hertz.
configure interface cable-downstream <slot/port> cable frequency <frequency>
For Cable Access Modules without integrated up-converters (IUC), the downstream frequency must be set to match the expected
output frequency of the upconverter in the associated downstream path.
The digital carrier frequency is specified to be the center of a 6.0 MHz channel in Annex B (North America) or 8.0 MHz channel in
Annex A (Europe). The step size for defining valid downstream center frequencies is 125 kHz.
The DCAM supports the DOCSIS/EuroDOCSIS 3.0 extended frequency range of 85-860 MHz for Annex A and of 57-999 MHz for Annex
B.
Note: The 16D/XD CAM hardware supports downstream center frequencies up to 999 MHz, but for the best performance, it is
advisable to go no higher than 960 MHz
Parameters
The chassis slot in which the targeted downstream Cable Access Module resides. Valid range for the C4 CMTS is 0-15; valid range for
the C4c CMTS is 10-15.
Where frequency equals the center frequency of the DS channel
Valid range = 57000000 - 999000000 (57 - 999 MHz).
Default frequency is 321000000
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