Is't the above mentioned example wrong?
60W setting should then be within 48-72W?
Yes, it´s wrong and nobody noticed, not even me
It should be "For example, if the diagram shows that at the 50 ohms control setting and with X load resistance the output would be 60 Watts, when you measure it according to the standard the real output has to be between 40-72 Watts."
40-72 Watts is +- 20% of 60 W.
Hope they did understand back them though.
Thanks for this!