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I have seen several block diagrams with diagonal inputs, drawn with an arrow through the block.

enter image description here and others like that (via Google image search)

What is difference between this and a typical signal input? What are the dotted lines signifying?

Nick Alexeev
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andrewhunter
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1 Answers1

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The diagonal input generally means that it changes some parameter of the block, such as its gain, without otherwise becoming part of the signal that the block is processing.

Dave Tweed
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