Cisco Systems UBR7225VXR specifications Viewing the Downstream if Signal on a Spectrum Analyzer

Chapter 4 Connecting the Cisco uBR7225VXR Router to the Cable Headend

Measuring the Downstream RF Signal

Figure 4-3 Viewing the Downstream IF Signal on a Spectrum Analyzer

Step 5 Measure the IF signal using the channel power option on your spectrum analyzer. Set your channel spacing and your channel bandwidth to 6 MHz. Your analyzer should display a signal similar to the one shown in Figure 4-4.

Figure 4-4 Measuring the IF Channel Power

Note The IF channel power in Figure 4-4is +34.23 dBmV, as displayed on the spectrum analyzer.

Step 6 Select the video averaging feature. Your spectrum analyzer should display a signal similar to the one shown in Figure 4-5.

Cisco uBR7225VXR Universal Broadband Router Hardware Installation Guide

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