Cisco Systems UBR7225VXR specifications OL-17309-02

Chapter 4 Connecting the Cisco uBR7225VXR Router to the Cable Headend

Measuring the Downstream RF Signal

Figure 4-10 Measuring the RF Signal at the Upconverter Output—Output Adjusted to Correct Range

Step 9 Select the video averaging feature on the spectrum analyzer. The signal becomes smoother and frequency response problems might become visible. Your analyzer now displays an RF signal similar to the one shown in Figure 4-11.

Figure 4-11 Measuring the RF Signal at the Upconverter Output Using Video Averaging

Note The approximate in-channel peak-to-valley flatness may be verified using the spectrum analyzer’s video averaging feature. Be aware, however, that amplitude values registered while in the video averaging mode are typically around 2.5 dB below the actual channel power.

	Cisco uBR7225VXR Universal Broadband Router Hardware Installation Guide
4-10	OL-17309-02