triggering a wave chop

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I have a chop network where I take some static geometry and modify it's tz channel with a wave chop. I've done this as I've seen on several examples here via a lookup chop.

The thing that I want to add to this is to have the wave “ripples” start when a trigger goes off. I have a trigger sop that goes off when an attribute reaches a certain value. But I don't know how to make that trigger drive the animation (amplitude/phase) of the wave.

Thanks.
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can you upload your scene, that doesn't make sense
Houdini is a big thing!
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perhaps you can consider using chopf() function to look up the wave value? You can either use global frame or some sort of time/age variable to looking up the wave value.
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The easiest way is maybe that if your trigger is an integer with values 1 and 0 you can use a switch node in your chop network to activate a certain part of the network.
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