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Cisco uBR7225VXR Universal Broadband Router Hardware Installation Guide
OL-17309-02
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 4-4 is +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.