Angel of Attack wrote on Dec 10^th, 2020 at 8:01am:

Another thing I noticed is the target TO EPR will decrease with speed growth, I know it will be ture if N1 is fixed or if it's a fuelflow controller engine, but not sure how it should be for EEC engine like 757's. But I would assume the EEC would keep EPR constant. For most weight I have, the ATM temp can even push the TO EPR at about 180~200kts to be lower than CLB2 EPR when it switches, even when the TO EPR at stationary are higher than CLB one. It can't be set lower than CLBx one as TMC setting, but on CS757 this only apply when stationary.

After watch some cockpit video, I'm sure my assumption is correct: EEC should keep EPR constant at the whole TO run