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Not 1mv, I think you mean 1microvolt.
You want the least amount of signal that will allow the SINAD meter to work properly.
I have not examined the SINAD meter software as provided by ROBB to see if it has other frequencies as an option so I don't know if you can alter it to work with 400cps. (maybe this is a good time to alert ROBB to a private message from myself)
But I do know that a SINAD meter will not function properly if the tone is not exactly what it is supposed to be.
If you do the mod for the 1kc modulation tone you have to make sure that it is dead nuts on frequency, (1kcps) as the SINAD meter will not tolerate that being off frequency.
After considering what information you have provided I believe you are good to go with the generator.

[QUOTE="RADIOOMAN, post: 415531, member: 25990"] Not 1mv, I think you mean 1microvolt. You want the least amount of signal that will allow the SINAD meter to work properly. I have not examined the SINAD meter software as provided by ROBB to see if it has other frequencies as an option so I don't know if you can alter it to work with 400cps. (maybe this is a good time to alert ROBB to a private message from myself) But I do know that a SINAD meter will not function properly if the tone is not exactly what it is supposed to be. If you do the mod for the 1kc modulation tone you have to make sure that it is dead nuts on frequency, (1kcps) as the SINAD meter will not tolerate that being off frequency. After considering what information you have provided I believe you are good to go with the generator. [/QUOTE]

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