Ok…It's not how I explained it…but here is one way.
You could a couple constants each trimmed and sequenced, then use the cycle node to repeat.
I'll post shortly with an example
Don't see any “channel rop” available in the chop net.
There is only a rop network available.
But then too, why use a “channel rop” when you can simply just save out to file. No extra nodes required.