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Hello,
I have generate a bode plot. I want to get the gain value which is fallen to -1dB based on the gain value at 1kHz. I know I could take the cursors, but I want to take the measurement results.
For example 30.3dB at 1kHz and 29.3dB at x kHz.
I thought I can take the function: bandwidth(1,dB_level) from the measurement results. I write Bandwidth( DB(V(Uaus1)/V(Uein)) , 1 ) but I get no result.
Can everone help me, please?
Best regards
Dirk
I think you are looking for an measurement expression some thing like
Frequency at which GAIN is = db(Gain at 1KHz ) - 1db
I don't think, this is same as bandwidth(1,dB_level). This expression would give you bandwidth for "db_level" say 2db bandwidth.
You need to create your own custom measurement expression for that. You may want to refer "YatX" measurement expression syntax (Trace >measurement > View) and modify this as per your requirement.
thank you for your answer and for the note, with the YatX function. And you say, I should modify the YatX function. I have tried to create a new measurement expression, but it is not possible. I open Trace >measurement > New. Then I copy the data of an existing file, for example YatX an push ok. But there is no new Measurement. Can I only modify an existing measurement?
Do you know sources, about this theme, that I can reading about this?