Cisco Systems uBR7246VXR quick start

The amplitude and shape of the downstream IF carrier does not change after the router is configured, regardless of modulation scheme used whether 64 or 256-QAM.

Tip By default, Cisco uBR-MC16U or Cisco uBR-MC28U cable interface line cards have no output until the DS freq is set and the command no cab down rf-shutis applied.

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