Hi ! I am making an RF Transmitter and i have a problem with power leakage for LO port to IF port and RF port. I don't know what to do and i am little confused about how can i fix this.
Source(-10 or -20dBm) 10KHz --------->MIxer conv.loss=8db--------->RF port
L.O=30.01MHz and 7dbm
I put an oscilloscope to mixers input IF and i don't see a sin wave from my Source. I is a sine wave with a lot of phase noice and amplitude variations..when i decrease the L.O power the sine becomes better.:o
I have heard about attenuators but i cannot understand how they will solve the problem. They attenuate maybe the standing waves that maybe create ?Also and my signal right? I don't understand... http://i1284.photobucket.com/albums/a578/fovos1/P5181092_zps5ee33fa8.jpg