Noise Measurement Methodology
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Juniper Networks G10 CMTS Pre-Installation Guide
14
Figure 1: Average Upstream Noise Measurement Example
Peak Upstream Noise Measurement
This section defines a procedure for taking the peak upstream noise measurements
requested as part of the RF plant/HFC environment characterization. A statistical sample of
total nodes terminated at the installation site (10% recommended) should be taken. Table 9
provides the appropriate setup configuration settings for the HP 8591C spectrum analyzer.
Table 9: Peak Noise Spectrum Analyzer Setup
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 per the values defined in Table 9.
3.
Start the measurement.
Upon completing the measurement, the analyzer display should resemble Figure 2 on
page 15.
Setting
Value
Start Frequency
2 MHz
Stop Frequency
45 MHz
Resolution Bandwidth
100 kHz
Video Bandwidth
30 kHz
Scale
5 dB/div
Internal Amplifier
Off
Attenuator
0 dB
Reference Level of Headend
0 dBmV
Max Hold
1 minute
Содержание G10 CMTS
Страница 4: ... Juniper Networks G10 CMTS Pre Installation Guide iv ...
Страница 6: ...List of Figures Juniper Networks G10 CMTS Pre Installation Guide vi ...
Страница 8: ...List of Tables Juniper Networks G10 CMTS Pre Installation Guide viii ...
Страница 12: ...G10 CMTS Document Set Juniper Networks G10 CMTS Pre Installation Guide xii ...
Страница 27: ... Noise Measurement Methodology 15 Figure 2 Peak Upstream Noise Measurement Example ...
Страница 32: ...Additional Characterization Tables Juniper Networks G10 CMTS Pre Installation Guide 20 ...