My problem is easy to explain. I want to couple/add some Noise into 240V 50Hz. For this purpose, I have a Noise Generator which is triggered manually with a signal processed by a microcontroller.
I only have to couple that noise (high frequncy one) into those 240V. I found a PCB which consisted on a high pass filter, so I decided to see if this experiment could work. The idea is using the filter to couple the noise there, and also filtering the high voltage (50 Hz) in order to not to damage the Noise generator. (See the image below). There should be like 40dB of attenuation for the 240V 50Hz, so there is no problem with it I think.
The thing is that this doesn't work, and I dont know why. When I connect the filter, the Noise generator isn't able to get the expected V out, and, as a consequence of this, I dont get the results that I want. I have checked the maximum intensity that this generator is able to deliver (due to the low value of the resistor placed on the filter), and there is no problem with it.
So, is there anything that I am ignoring? Thanks :)