Hello , i am having trouble understanding what was done in the table in the attahed photo
?

thanks

we want a 20dB couping with 1dB ripple, so Cmax is -19 and Cmin is -21

what kind of itterations?, why they pick each time a different C_max?
C max is -19 dB which is 0.112202
C max and Cmin are given to us from the question

Thanks

неприличными словами не выражаться!