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CHAPTER
4-1
Cisco uBR7225VXR Universal Broadband Router Hardware Installation Guide
OL-17309-02
4
Connecting the Cisco uBR7225VXR Router to the
Cable Headend
This chapter describes how to connect the Cisco uBR7225VXR universal broadband router to a cable
headend and contains the following sections:
• Two-Way Data Headend Architecture, page 4-2
• One-Way Data Headend Architecture, page 4-3
• RF and Digital Data Overview, page 4-3
• Connecting and Configuring the Downstream, page 4-4
• Measuring the Downstream RF Signal, page 4-4
• Connecting and Configuring the Upstream, page 4-18
• Measuring the Upstream RF Signal, page 4-22
• Measuring the RF Signal at the Forward Test Point on a Laser Transmitter, page 4-37
• Configuring the Digital Signal, page 4-40
Note Before installing your Cisco uBR7225VXR router, analyze the radio frequency (RF) setup at your
headend and configure the analog RF signals for interaction with digital data. This chapter guides you
through the process of configuring the RF and digital data at the headend for optimal performance.