| There is another way, homebrew a inexpensive  measure receiver ( please view 
W7ZOI Wes Hayward's EMRF), it shoud be do this job. I have a question too, we  
test  IMD using a two tone generator and a SSB transmitter, but you know, your 
transmitter with IMD too , use  a "dirty "  signal  as a driver,How we 
calculate the amplifier 's IMD under test( if we know the transmitter's IMD)? 
if we can not calcaulate it,we must using two "clean" single tone 
transmitterer(CW transmitter) +combiner as a driver? 
 
      73! Hsu
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