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Output Power should be vicinity of P1dB. In fact, there isn't any convention about that because some manufacturers use P3dB some of them P1dB.
Nevertheless, P1dB Compression Point is chosen and Input Power is adjusted in according with that.Because Optimum Load will be used to achieve max. [specification]<interested specification="">
<interested specification=""> [specification]: max Pdelivered or max. Efficiency or max. Power Gain..</interested></interested>
You should drive the PA until the PA enters into SAT mode in order to observe the Efficiency in Main and Aux. Amplifier regions. Back-Off effect in Efficiency can be observed with this method ..Thanks for the valuable information. Is the same thing is considered for doherty sub-amplifiers (main & auxiliary)? I want to do a correct DPA design, but still confusing about load pull setting such as input power level for each one of the sub-amplifiers