*If you know the level
at 45 MHz and the level you want out of the MMIC, you can place a simple
resistive PI or T attenuator between your 45 MHz source and the MMIC,
then the output of the MMIC would be the level arriving at the MMIC plus
it's associated gain.http://www.minicircuits.com
N0EDV
Is a bad idea. Atttenuation before MMIC invrease NF of receiever.