1. We use STM32 to control the LMX2592 as a signal source output.
The flatness of the output at greater than 1 GHz to 3.55 GHz is very poor.
We tried to adjust the output match of the LMX2592 without any significant improvement. We did not notice any significant improvement by referring to the circuit on datashet.
2. As above, a mutation of 10 dBm in amplitude was output near the frequency of 3.55 GHz, and the program code was checked for a long time and no problem was found.
3. The test instrument we used was the E4407B. A 3dB attenuator was connected to the input of the E4407B.
