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Re: John, you were sucker-punched, then piled on, by the Usual Suspects.


I would say: 50 dB in this case.

You would say? You don't seem too sure of that. Why would it apply 50dB of gain? I went back and searched a previous thread and found where you said that the oscillator had a fixed output of about 3 volts. To get the 30mV output you fed into the cable, that would require 40dB of attenuation.

If the 1700B's supposed to be normalizing the gain, why would it apply more gain than attenuation? I thought the point of normalizing the gain was so that the magnitude of the harmonics would be the same as they would be if they were referenced to the 3 volt output of the oscillator? In that case, it should be applying as much gain as attenuation. Which in this case it would be 40dB.

So how sure are you about the 50dB figure? If the 3 volt fixed level of the oscillator is correct, and the 30mV signal you sent through the cable is correct, 50dB doesn't seem to make any sense. Does the notch filter have a 10dB insertion loss or something?

se




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