All,

I am doing some testing with an audio PA system that has the output of 100V (rms). What I am trying to do is take this 100V(rms) and bring it down to an audio line level of about 280 mV (rms). I am doing this with a resistor divider.


1.) An image of 100V (rms) input signal measured on oscilloscope is below:


http://s1070.photobucket.com/user/Mr...bcqkm.jpg.html


2.) I am then dividing this down to ~280mV with a resistor divider,
375k and 1k. Here is the image of the signal from the resistor divider:


http://s1070.photobucket.com/user/Mr...6hhbp.jpg.html


As you can see the signal here looks extremely distorted on the oscilloscope! I am not sure if this is what really is happening or if it is an artifact of the oscilloscope.


3.) We have some audio equipment from the company Audio Precision here and with their equipment the signal looks much cleaner. See image below:

http://s1070.photobucket.com/user/Mr...9km9s.jpg.html


4.) There are some transformer options out there to take a 100V signal and bring it to a line level but I wanted to see if we could do this with a less expensive resistor divider solution.

Thank you from any thoughts you have on this.

-Robert