[Elecraft] K144xv power output

[Fausto Coletti]

Hi all, 

I should reduce the output power of the K144XV to a level of less than 1 Watt. 
I need this because I use the 144 MHz band to drive my microwave transverter. 
I tried to adjust the parameter "config XV1 PWR" to the value L .01 but the output power does not drop below 3 W. 
Then I thought of two possible solutions: 

1) insert an attenuator on the cable "IF IN" of the K144XV 
2)try adjusting the trimmer R87 on the K144XV 

Which is the best solution? 

73, Fausto IK4NMF