OK, today seems like a good day for IF and AGC questions, which is exactly where I am :-). On step 19 of table 5-5, it says to feed 100uV into the radio and read -4.0V on TB102-3, and to feed 10mV into the radio and read -1.4V on TB102-3. Shouldn't a higher signal level produce a more negative voltage there? Tim.