Mismatch&power leakage with port of mixers..attenuators solution

Fovakis

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

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>RF port

and

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?

http://i1284.photobucket.com/albums/a578/fovos1/P5181092_zps5ee33fa8.jpg
I don't understand...

kwinn

Sorry Fovakis, but this is probably the wrong forum to post this question, and even if it was the right one there is nowhere near enough information in your post for anyone to help you.