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Hello, I am new to this forum and working on my first VHF transceiver design.

I have been evaluating the ADF4153A with the simulation software and have a bug. After setting everything up and running a simulation, I go back and increase my upper frequency range. When I do this, the ACP for channel one increases by 20 dB. When I revert back to my original band, the ACP does not drop back, but remains about 20 dB high. I have changed nothing else. I have tried manually recalulating. This has me questioning which figure, if any, can I put any confidence in?

Original range 150-174 MHz     ACP @ 12.5 kHz is -72 dBc

New range 150-184 MHz          ACP @ 12.5 kHz is -52 dBc

Thank you!