Constant power for all waveforms?

The image above is from the presentation given by Professor John Roulston who masterminded the development of Blue Vixen radar.

According to Jane’s, RN Sea Harrier FA2s ‘surprised’ USAF F-15Cs in the exercise Purple Star in 1996 by firing simulated AMRAAMs in TWS rather than STT mode – the F-15C’s RWR couldn’t tell whether the Sea Harrier fired AMRAAMs or not.

Now here is the question – does “constant power for all waveforms” has anything to do with deceiving the opponent’s RWR?

Thanks in advance,
Sunho