between when

[notletrest]

"This is basically the time interval between when the output changes due to the input change which caused it."

The above means:1.This is basically the time interval from output to input. 2.This is basically the time interval from the first output to the sencond output.
Which do you agree with?
Thanks !

[Frank Antonson]

The sentence doesn't make sense. You need and "and" in it. Where did you get that sentence?

[notletrest]

The sentence doesn't make sense. You need and "and" in it. Where did you get that sentence?

The one came from a text book by a nation -wide teaching group.

[Frank Antonson]

Well, it still doesn't make any sense.

[notletrest]

Well, it still doesn't make any sense.

Thanks for your help!