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high band power attenuated on e4407b.

Question asked by metrotechdude on Nov 7, 2017

recently installed new RF assembly and had no frequency above 3ghz so i swapped high frequency card and was able to get readings through the high band to 26.5 ghz. however the signal is attenuated by 8db when reading -10db at max range, it begins to attenuate right after 2.9 ghz. any suggestions? i have changed LOIS  but did not solve. I am at a loss with the service manual it isnt very helpful. low band works great. #analyzer #power #frequency #e4407b