问题：
My noise bandwidth has been changed by another user on the Carrier-to-Noise measurement in the 2714 or 2715 CATV Spectrum Analyzer.
答案：
The default noise bandwidth that the Cable TV industry uses for the C/N measurement is 4.0 MHz. This is set in the CATV Measurements menu, then select Carrier-to-Noise, then select Setup Carrier-to-Noise. Now select Noise Norm'd BW and set to 4.0 MHz.
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常见问题 ID 62051
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