Peak Upstream Noise Measurement; Figure 23: Average Upstream Noise Measurement Example; Table 34: Peak Noise Spectrum Analyzer Setup - Juniper G10 CMTS Hardware Manual

Noise Measurement Methodology
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Figure 23: Average Upstream Noise Measurement Example

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Peak Upstream Noise Measurement

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Table 34: Peak Noise Spectrum Analyzer Setup

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84 JUNOSg 3.0 G10 CMTS Hardware Guide
This section defines a procedure for taking the peak upstream noise measurements required
as part of the RF plant and HFC environment characterization. We recommend that you take
a sample of 10 percent of the nodes terminated at the installation site. Table 34 provides the
appropriate setup configuration settings for the HP 8591C spectrum analyzer.
Setting
Start frequency
Stop frequency
Resolution bandwidth
Video bandwidth
Scale
Internal amplifier
Attenuator
Reference level of headend
Max Hold
1. Connect the spectrum analyzer to the selected upstream signal at the upstream splitter
or at the CMTS upstream port.
2. Configure the spectrum analyzer using the values defined in Table 34.
3. Start the measurement.
After completing the measurement, the analyzer display should resemble Figure 24 on
page 85.
Value
2 MHz
45 MHz
100 kHz
30 kHz
5 dB/div
Off
0 dB
0 dBmV
1 minute